Real FFT for C54x | TMS320C54x

Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).

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Hi

I need an optimized double precision ( fixed point Q31 format ) 1024 point
real
FFT routine for the TMS320C54x DSP family. The DSPLIB from Texas only
contains single precision ( Q15 format ) FFTs.

Best regards
Torgeir Jakobsen
e-mail: t...@aanderaa.no

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Hi I found a document from Texas describing how to do a real FFT by using a complex FFT. The document "Implementing Fast Fourier Transform Algorithms of Real-Valued Sequences with the TMS320 Family" descirebes how to do it (SPRA291). Instead of using the single precision FFT described in this document, I use the Double-Precision Complex FFT described in SPRA554A. This way you can use a N/2 point complex FFT to transform a N point real sequence. Best regards Torgeir Jakobsen e-mail: wrote: original article:http://www.egroups.com/group/c54x/?start=20 > Hi > > I need an optimized double precision ( fixed point Q31 format ) 1024 point > real > FFT routine for the TMS320C54x DSP family. The DSPLIB from Texas only > contains single precision ( Q15 format ) FFTs. > > Best regards > Torgeir Jakobsen > e-mail:

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Discussion Groups | TMS320C54x | Real FFT for C54x

Real FFT for C54x - Torgeir Jakobsen - Jul 9 14:06:00 1999

Re: Real FFT for C54x - Author Unknown - Aug 25 9:52:00 1999