Take a look at the phase rotator in the frequency translating FIR filter.
Is it done with sine/cos lookups or is it a rotating phasor? Rotating
phasors can lose amplitude due to finite precision effects.
Matt
On Fri, Aug 14, 2015 at 1:57 PM, John Ackermann N8UR wrote:
> Still working with the
On Fri, Aug 14, 2015 at 4:57 PM, John Ackermann N8UR wrote:
> Still working with the polyphase channelizer program. While everything
> "works", there is something very strange: the output amplitude slowly drops
> the longer the program runs. As near I can tell, this happens in or
> following th
Still working with the polyphase channelizer program. While everything
"works", there is something very strange: the output amplitude slowly
drops the longer the program runs. As near I can tell, this happens in
or following the frequency translating FFT block.
To test, I stripped the flowgr
