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<a href="#var-members">Variables</a> </div>
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<div class="title">Complex FFT Tables<div class="ingroups"><a class="el" href="group__ComplexFFT.html">Complex FFT Functions</a></div></div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a>
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Variables</h2></td></tr>
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<tr class="memitem:gae247e83ad50d474107254e25b36ad42b"><td class="memItemLeft" align="right" valign="top">const uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae247e83ad50d474107254e25b36ad42b">armBitRevTable</a> [1024]</td></tr>
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<tr class="separator:gae247e83ad50d474107254e25b36ad42b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gae75e243ec61706427314270f222e0c8e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae75e243ec61706427314270f222e0c8e">twiddleCoef_16</a> [32]</td></tr>
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<tr class="separator:gae75e243ec61706427314270f222e0c8e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga78a72c85d88185de98050c930cfc76e3"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga78a72c85d88185de98050c930cfc76e3">twiddleCoef_32</a> [64]</td></tr>
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<tr class="separator:ga78a72c85d88185de98050c930cfc76e3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga4f3c6d98c7e66393b4ef3ac63746e43d"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga4f3c6d98c7e66393b4ef3ac63746e43d">twiddleCoef_64</a> [128]</td></tr>
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<tr class="separator:ga4f3c6d98c7e66393b4ef3ac63746e43d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga948433536dafaac1381decfccf4e2d9c"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga948433536dafaac1381decfccf4e2d9c">twiddleCoef_128</a> [256]</td></tr>
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<tr class="separator:ga948433536dafaac1381decfccf4e2d9c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gafe813758a03a798e972359a092315be4"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gafe813758a03a798e972359a092315be4">twiddleCoef_256</a> [512]</td></tr>
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<tr class="separator:gafe813758a03a798e972359a092315be4"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gad8830f0c068ab2cc19f2f87d220fa148"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gad8830f0c068ab2cc19f2f87d220fa148">twiddleCoef_512</a> [1024]</td></tr>
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<tr class="separator:gad8830f0c068ab2cc19f2f87d220fa148"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga27c056eb130a4333d1cc5dd43ec738b1"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga27c056eb130a4333d1cc5dd43ec738b1">twiddleCoef_1024</a> [2048]</td></tr>
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<tr class="separator:ga27c056eb130a4333d1cc5dd43ec738b1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga23e7f30421a7905b21c2015429779633"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga23e7f30421a7905b21c2015429779633">twiddleCoef_2048</a> [4096]</td></tr>
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<tr class="separator:ga23e7f30421a7905b21c2015429779633"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gae0182d1dd3b2f21aad4e38a815a0bd40"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae0182d1dd3b2f21aad4e38a815a0bd40">twiddleCoef_4096</a> [8192]</td></tr>
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<tr class="separator:gae0182d1dd3b2f21aad4e38a815a0bd40"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaef4697e1ba348c4ac9358f2b9e279e93">twiddleCoef_16_q31</a> [24]</td></tr>
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<tr class="separator:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8ba78d5e6ef4bdc58e8f0044e0664a0a">twiddleCoef_32_q31</a> [48]</td></tr>
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<tr class="separator:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga6e0a7e941a25a0d74b2e6590307de47e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6e0a7e941a25a0d74b2e6590307de47e">twiddleCoef_64_q31</a> [96]</td></tr>
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<tr class="separator:ga6e0a7e941a25a0d74b2e6590307de47e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gafecf9ed9873415d9f5f17f37b30c7250"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gafecf9ed9873415d9f5f17f37b30c7250">twiddleCoef_128_q31</a> [192]</td></tr>
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<tr class="separator:gafecf9ed9873415d9f5f17f37b30c7250"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaef1ea005053b715b851cf5f908168ede"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaef1ea005053b715b851cf5f908168ede">twiddleCoef_256_q31</a> [384]</td></tr>
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<tr class="separator:gaef1ea005053b715b851cf5f908168ede"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga416c61b2f08542a39111e06b0378bebe"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga416c61b2f08542a39111e06b0378bebe">twiddleCoef_512_q31</a> [768]</td></tr>
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<tr class="separator:ga416c61b2f08542a39111e06b0378bebe"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga514443c44b62b8b3d240afefebcda310"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga514443c44b62b8b3d240afefebcda310">twiddleCoef_1024_q31</a> [1536]</td></tr>
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<tr class="separator:ga514443c44b62b8b3d240afefebcda310"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga9c5767de9f5a409fd0c2027e6ac67179"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga9c5767de9f5a409fd0c2027e6ac67179">twiddleCoef_2048_q31</a> [3072]</td></tr>
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<tr class="separator:ga9c5767de9f5a409fd0c2027e6ac67179"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga67c0890317deab3391e276f22c1fc400"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga67c0890317deab3391e276f22c1fc400">twiddleCoef_4096_q31</a> [6144]</td></tr>
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<tr class="separator:ga67c0890317deab3391e276f22c1fc400"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8e4e2e05f4a3112184c96cb3308d6c39">twiddleCoef_16_q15</a> [24]</td></tr>
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<tr class="memitem:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gac194a4fe04a19051ae1811f69c6e5df2">twiddleCoef_32_q15</a> [48]</td></tr>
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<tr class="separator:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaa0cc411e0b3c82078e85cfdf1b84290f">twiddleCoef_64_q15</a> [96]</td></tr>
|
||
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<tr class="separator:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memSeparator" colspan="2"> </td></tr>
|
||
|
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<tr class="memitem:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gabfdd1c5cd2b3f96da5fe5f07c707a8e5">twiddleCoef_128_q15</a> [192]</td></tr>
|
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<tr class="separator:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memSeparator" colspan="2"> </td></tr>
|
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<tr class="memitem:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6099ae5262a0a3a8d9ce1e6da02f0c2e">twiddleCoef_256_q15</a> [384]</td></tr>
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<tr class="separator:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga6152621af210f847128c6f38958fa385"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6152621af210f847128c6f38958fa385">twiddleCoef_512_q15</a> [768]</td></tr>
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<tr class="separator:ga6152621af210f847128c6f38958fa385"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8a0ec95d866fe96b740e77d6e1356b59">twiddleCoef_1024_q15</a> [1536]</td></tr>
|
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<tr class="separator:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gadd16ce08ffd1048c385e0534a3b19cbb">twiddleCoef_2048_q15</a> [3072]</td></tr>
|
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<tr class="separator:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga9b409d6995eab17805b1d1881d4bc652"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga9b409d6995eab17805b1d1881d4bc652">twiddleCoef_4096_q15</a> [6144]</td></tr>
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<tr class="separator:ga9b409d6995eab17805b1d1881d4bc652"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
|
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
|
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<h2 class="groupheader">Variable Documentation</h2>
|
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<a class="anchor" id="gae247e83ad50d474107254e25b36ad42b"></a>
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<div class="memitem">
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<table class="memname">
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<tr>
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<td class="memname">const uint16_t armBitRevTable[1024]</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Pseudo code for Generation of Bit reversal Table is </dd></dl>
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<dl class="section user"><dt></dt><dd><pre>for(l=1;l <= N/4;l++)
|
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{
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for(i=0;i<logN2;i++)
|
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{
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a[i]=l&(1<<i);
|
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}
|
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for(j=0; j<logN2; j++)
|
||
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{
|
||
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if (a[j]!=0)
|
||
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y[l]+=(1<<((logN2-1)-j));
|
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}
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y[l] = y[l] >> 1;
|
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} </pre> </dd></dl>
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<dl class="section user"><dt></dt><dd>where N = 4096 logN2 = 12 </dd></dl>
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<dl class="section user"><dt></dt><dd>N is the maximum FFT Size supported </dd></dl>
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<p>Referenced by <a class="el" href="group__ComplexFFT.html#gac9565e6bc7229577ecf5e090313cafd7">arm_cfft_radix2_init_f32()</a>, <a class="el" href="group__ComplexFFT.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, <a class="el" href="group__ComplexFFT.html#gabec9611e77382f31e152668bf6b4b638">arm_cfft_radix2_init_q31()</a>, <a class="el" href="group__ComplexFFT.html#gaf336459f684f0b17bfae539ef1b1b78a">arm_cfft_radix4_init_f32()</a>, <a class="el" href="group__ComplexFFT.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group__ComplexFFT.html#gad5caaafeec900c8ff72321c01bbd462c">arm_cfft_radix4_init_q31()</a>.</p>
|
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</div>
|
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</div>
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<a class="anchor" id="ga27c056eb130a4333d1cc5dd43ec738b1"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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||
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<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_1024[2048]</td>
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||
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</tr>
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||
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</table>
|
||
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</div><div class="memdoc">
|
||
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<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
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{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
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twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
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} </pre> </dd></dl>
|
||
|
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<dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
|
||
|
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<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
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|
||
|
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<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
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|
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</div>
|
||
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</div>
|
||
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<a class="anchor" id="ga8a0ec95d866fe96b740e77d6e1356b59"></a>
|
||
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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||
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<tr>
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||
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<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_1024_q15[1536]</td>
|
||
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</tr>
|
||
|
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</table>
|
||
|
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</div><div class="memdoc">
|
||
|
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<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
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|
||
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</div>
|
||
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</div>
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||
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<a class="anchor" id="ga514443c44b62b8b3d240afefebcda310"></a>
|
||
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<div class="memitem">
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<table class="memname">
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||
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<tr>
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||
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_1024_q31[1536]</td>
|
||
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</tr>
|
||
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</table>
|
||
|
|
</div><div class="memdoc">
|
||
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<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
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<a class="anchor" id="ga948433536dafaac1381decfccf4e2d9c"></a>
|
||
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<div class="memitem">
|
||
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<div class="memproto">
|
||
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<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_128[256]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
||
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|
||
|
|
</div>
|
||
|
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</div>
|
||
|
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<a class="anchor" id="gabfdd1c5cd2b3f96da5fe5f07c707a8e5"></a>
|
||
|
|
<div class="memitem">
|
||
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<div class="memproto">
|
||
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|
||
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<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_128_q15[192]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gafecf9ed9873415d9f5f17f37b30c7250"></a>
|
||
|
|
<div class="memitem">
|
||
|
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|
||
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|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_128_q31[192]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gae75e243ec61706427314270f222e0c8e"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
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<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_16[32]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
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<a class="anchor" id="ga8e4e2e05f4a3112184c96cb3308d6c39"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_16_q15[24]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
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<a class="anchor" id="gaef4697e1ba348c4ac9358f2b9e279e93"></a>
|
||
|
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<div class="memitem">
|
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<div class="memproto">
|
||
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<table class="memname">
|
||
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<tr>
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||
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_16_q31[24]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga23e7f30421a7905b21c2015429779633"></a>
|
||
|
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<div class="memitem">
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<div class="memproto">
|
||
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<table class="memname">
|
||
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<tr>
|
||
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<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_2048[4096]</td>
|
||
|
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</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gadd16ce08ffd1048c385e0534a3b19cbb"></a>
|
||
|
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<div class="memitem">
|
||
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<div class="memproto">
|
||
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<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_2048_q15[3072]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga9c5767de9f5a409fd0c2027e6ac67179"></a>
|
||
|
|
<div class="memitem">
|
||
|
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<div class="memproto">
|
||
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<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_2048_q31[3072]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gafe813758a03a798e972359a092315be4"></a>
|
||
|
|
<div class="memitem">
|
||
|
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<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_256[512]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga6099ae5262a0a3a8d9ce1e6da02f0c2e"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_256_q15[384]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gaef1ea005053b715b851cf5f908168ede"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_256_q31[384]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga78a72c85d88185de98050c930cfc76e3"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_32[64]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gac194a4fe04a19051ae1811f69c6e5df2"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_32_q15[48]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga8ba78d5e6ef4bdc58e8f0044e0664a0a"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_32_q31[48]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="gae0182d1dd3b2f21aad4e38a815a0bd40"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_4096[8192]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
||
|
|
{
|
||
|
|
twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<a class="anchor" id="ga9b409d6995eab17805b1d1881d4bc652"></a>
|
||
|
|
<div class="memitem">
|
||
|
|
<div class="memproto">
|
||
|
|
<table class="memname">
|
||
|
|
<tr>
|
||
|
|
<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_4096_q15[6144]</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div><div class="memdoc">
|
||
|
|
<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
||
|
|
|
||
|
|
<p>Referenced by <a class="el" href="group__ComplexFFT.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group__ComplexFFT.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>.</p>
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_4096_q31[6144]</td>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
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{
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twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
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twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
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} </pre> </dd></dl>
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<dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
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<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
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<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
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<p>Referenced by <a class="el" href="group__ComplexFFT.html#gabec9611e77382f31e152668bf6b4b638">arm_cfft_radix2_init_q31()</a>, and <a class="el" href="group__ComplexFFT.html#gad5caaafeec900c8ff72321c01bbd462c">arm_cfft_radix4_init_q31()</a>.</p>
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<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_512[1024]</td>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
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{
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twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
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twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
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} </pre> </dd></dl>
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<dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
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<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
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<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
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<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_512_q15[768]</td>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
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{
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twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
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twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
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} </pre> </dd></dl>
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<dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
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<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
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<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_512_q31[768]</td>
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</table>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
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{
|
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twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
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twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
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} </pre> </dd></dl>
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<dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
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<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
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<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
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<td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_64[128]</td>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
|
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< N/; i++)
|
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{
|
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twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
|
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twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
|
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} </pre> </dd></dl>
|
||
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<dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
|
||
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<dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
|
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<p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
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<a class="anchor" id="gaa0cc411e0b3c82078e85cfdf1b84290f"></a>
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<td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_64_q15[96]</td>
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</table>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
|
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<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
|
||
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twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
|
||
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} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
|
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<a class="anchor" id="ga6e0a7e941a25a0d74b2e6590307de47e"></a>
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_64_q31[96]</td>
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</div><div class="memdoc">
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<dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd><pre>for(i = 0; i< 3N/4; i++)
|
||
|
|
{
|
||
|
|
twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
|
||
|
|
twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
|
||
|
|
} </pre> </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
|
||
|
|
<dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
|
||
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||
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</div>
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</div>
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</div><!-- contents -->
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<li class="footer">Generated on Wed Feb 8 2017 10:20:51 for CMSIS-DSP by ARM Ltd. All rights reserved.
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