: casper@lists.berkeley.edu
Subject: Re: [casper] VEGAS PFB / FFT
The CASPER PFB uses a sample NTAPS times, using a sliding window that jumps by
NCHAN time samples.
On Mon, Dec 5, 2016 at 7:33 AM Jayanth Chennamangalam
mailto:jayan...@gmail.com>> wrote:
Hi Richard,
In the VEGAS LBW modes, a s
The CASPER PFB uses a sample NTAPS times, using a sliding window that jumps
by NCHAN time samples.
On Mon, Dec 5, 2016 at 7:33 AM Jayanth Chennamangalam
wrote:
> Hi Richard,
>
> In the VEGAS LBW modes, a sliding window is implemented. As you've pointed
> out, the existence of a pre-filtering sta
Hi Richard,
In the VEGAS LBW modes, a sliding window is implemented. As you've pointed
out, the existence of a pre-filtering stage does not change the rate of
availability of spectra at the output.
Perhaps someone else can clarify how it's implemented on the FPGA.
Cheers,
Jayanth
On 5 Decemb
Hi Richard,
I will let someone else say how the PFB block is actually implemented, but
the correct method is as you have described, so that each sample in a 4-tap
PFB will be used 4 times. I do not see how it could work otherwise, and
indeed the whole point of the PFB is to give the effect of a w
Hi All -
[ Long time CASPER groupie, first time posting. :) ]
I am trying to understand the VEGAS implementations of the PFB/FFT technique,
both in the FPGA and the CPU. For simplicity, I will use the example on the
CASPER wiki page,
https://casper.berkeley.edu/wiki/The_Polyphase_Filter_Bank_T
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