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loss of quantization bits when doing FFT and IFFT

Started by ahgu October 6, 2003
cbrev(x,x,NX/2);
rfft(x,NX,1);
unpacki(x,NX);
cbrev(x,x,NX/2);
rifft(x,NX,1); When I get the result back, the data is reduced by a factor of 128. How to
do FFT/IFFT without loss of quantization bits? Anyone has routine I can use?

thanks
Andrew