Re: [Discuss-gnuradio] Rounding errors in PFB channelizer?

On 11/30/2017 02:08 PM, Müller, Marcus (CEL) wrote:
[ snip ]

> You can do that (obviously, it works!), but I'd recommend you just use
> a channelizer with N=125 instead of 117! Your channel map can be used
> to ignore the channels you don't need (which seem to be the 4 upper and
> lower "edge" ones), and by only increasing the workload of the PFB ever
> so slightly (probably even actually decreasing it, because an 125=5³-
> FFT is likely to be much more efficient than an 117=3²·13-FFT), you get
> rid of the rational resampler, which not only brings more CPU load, but
> also a resampling filter response that might have ripple and aliases.

Thanks for that suggestion, Marcus! I have the resampler version
running right now but will change to use the channel count idea instead.

John

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