Hello all,
I just had a quick
question regarding the polyphase channelizer. As a start, I'm trying to
divide an input spectrum into 6 channels of equal width. My sample rate
for now is 5 MHz and the way I'm calculating the taps as follows:
firdes.low_pass2(1.0, samp_rate, samp_rate/(nchan*2.15), samp_rate/(nchan*13.8),attenuation_dB = 10, window = firdes.WIN_HAMMING)
The
channels are being divided equally now, but the first channel behaves very
different from the rest, it becomes super wide for a moment, and then
shrinks back to normal just like the rest of the channels and this
happens repeatedly. I'm honestly stumped as to what the reason could be,
so would really appreciate if anybody can point me in the right
direction or at least clarify why this is happening.
You can find the images here:
http://tinypic.com/a/3e8so/4