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Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??
From: |
Charles Swiger |
Subject: |
Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ?? |
Date: |
Fri, 17 Mar 2006 14:46:34 -0500 |
On Fri, 2006-03-17 at 10:16 -0800, Eric Blossom wrote:
> The function has the right name, mod_2pi, but the wrong implementation ;)
> These are commonly called bugs ;) Hence my comments above about doing the
> mod the right way.
Roger that. Plowing right ahead with a hacked 1st order PLL filter,
here's a screenshot of Sync AM detection rev 1.0, suprisingly works:
http://webpages.charter.net/cswiger/AM_sync.jpg
the carrier at 7.5k in the upper screen (Voice of Turkey) bounces
between 15 and 30db, while the phase locked, filtered and scaled one in
the bottom is nailed at 20db. Convert to real and mix yeilds audio.
There must be a trivial way to change +7.5kHz to -7.5kHz so we can use
complex mixing...
--Chuck
- [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Robert McGwier, 2006/03/16
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??,
Charles Swiger <=
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, ldoolitt, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Charles Swiger, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Matt Ettus, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Robert McGwier, 2006/03/17
- Re: [Discuss-gnuradio] pll_refout_cc - finding optimum alpha & beta ??, Eric Blossom, 2006/03/20
- Re: [Discuss-gnuradio] fixing gr_pll_*_c[cf], Charles Swiger, 2006/03/22
- Re: [Discuss-gnuradio] fixing gr_pll_*_c[cf], Eric Blossom, 2006/03/22