On Fri, Oct 14, 2011 at 1:42 PM, John Ackermann N8UR <j...@febo.com> wrote:
> Marcus D. Leech said the following on 10/14/2011 01:18 PM: > > On 14/10/2011 12:53 PM, John Ackermann N8UR wrote: >> > > Doesn't the PFB channelizer down-sample as well? So your output sample >> rates from the channelizer will be mis-matched to the >> UHD USRP sink? >> > > That's what I'm trying to figure out. A 4x interpolator doesn't seem to > help, though. I'm not sure if the "oversample" parameter in the channelizer > might act as an interpolator, or if that provides some other function. > > John > The oversample parameter is to make the outputs have some n samples/channel. By default, it's 1, so the output sample rate of each channel is fs_in/M for M channels; this is also the bandwidth (the signal is critically sampled). If you have n=2, then the sample rate of each channel is 2*fs_in/M, but your bandwidth is still fs_in/M. So you shouldn' need to worry about the oversample rate. So, yes, the channels are downsampled by a factor of M. Tom
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