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Re: [Discuss-gnuradio] Additional Decimation
From: |
Martin Dvh |
Subject: |
Re: [Discuss-gnuradio] Additional Decimation |
Date: |
Tue, 09 Oct 2007 22:15:06 +0200 |
User-agent: |
Icedove 1.5.0.12 (X11/20070607) |
Gregory W Heckler wrote:
> Would anyone be interested in an additional decimation stage after the CIC
> and
> the halfband filters? The usable bandwidth is ~25-50% of the actual post
> decimation sample rate, an additional decimation stage (no filtering, just a
> plain decimation) would allow the sample rate pushed across the USB to be
> decreased while discarding the unused bandwidth. I am going to pursue this
> myself and wondered if I should post any Verilog changes I make.
You should be carefull with decimation without additional filtering.
Without filtering your spectrum will flip over at the new niquist boundaries.
Greetings,
Martin
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