Problems with RFFT/CFFT - DSPlib | 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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Hello!

I�m using the C5416 DSK and now I�m writing a code that do the FFT of a signal generated on the same code. I�ve used the cbrev functions, to reverse the bits and after I�ve used the RFFT function. But the results are diferent from the Matlab. In fact, I didn�t understand how interpret the result that RFFT gives. I know it has to result complex numbers, but it didn�t (obviously, it is in C language). But, so, how can I generate the complex numbers? I�ve tried to do the complex numbers with the half of the output vector as the real and the second half output as the imaginary, but the result continues wrong. I�ve tried to use the Cfft too, but I�ve continue with the problem. I saw the example in the directory of DSPlib, but I didn�t understand. Can you help me with this problem?

Thank you,

Guilherme

_____________________
Guilherme Martinhon
Engenheiro Eletricista
Mestrando em Engenharia El�trica
�rea: Instrumenta��o Eletr�nica
Laborat�rio de Ultra-Som
UNESP - Campus de Ilha Solteira

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Discussion Groups | TMS320C54x | Problems with RFFT/CFFT - DSPlib

Problems with RFFT/CFFT - DSPlib - Guilherme Martinhon - Jan 31 19:41:00 2006