schrieb Patrick Strasser on 2011-01-25 16:55: > schrieb Bernardo Gonçalves am 2011-01-25 10:15:
>> Basically, the problem is that it works just as mono, not stereo... > Second, I looked at your flowgraph. You shift the difference part from > center frequency 38kHz to 0 with the Xlating FIR filter, and then use a > complex-to-float block. This will not result in the positive > frequencies. You'd rather have to filter out the negative frequencies > with a Hilbert transformer, that is a special FIR filter keeping only > positive frequencies, before converting to float again. Sorry, I was wrong. You did the low-pass filtering, that was already right. But two other things I did notice: 1) The difference signal, which is shifted down from 38kHz is several 10dB lower than the sum signal. With different gains I got something more stereo-like. 2) The sum signal is faster than the difference signal. In the diff-signal path you have more blocks that are processed. Some delay (delay block) could maybe fix this problem, but I did not get the right value at a quick try. Patrick -- Engineers motto: cheap, good, fast: choose any two Patrick Strasser <patrick dot strasser at tugraz dot at> Student of Telematik, Techn. University Graz, Austria _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
