Hi Robert! This is strange -- but could be explained by the fact that numerical inaccuracy don't allow us to *exactly* recreate all values during fft-ifft operation. Also, make sure you use a rectangular window.
How do you know there is this very low frequency carrier? how low is it? How much power does it have? Greetings Marcus On 11/18/2013 03:40 AM, Robert James wrote:
When I take a signal, stream->vector-->FFT-->IFFT-->vector->stream, I'd expect to get the original signal back. Instead, I'm getting something like the original signal, but following a very low frequency carrier. I thought this was due to the limits in vector size, but making this very high (many times the sample size and signal freq) and the problem continues, What's weirdest is that a low pass filter or band pass filter on the output don't seem to solve the problem! What is my mistake? _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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