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Re: [Discuss-gnuradio] bpsk Simulation

From: Axel Belliard
Subject: Re: [Discuss-gnuradio] bpsk Simulation
Date: Tue, 16 Mar 2010 10:18:32 +0100 (CET)
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I think our issues are related to the synchronizations parameters (Costa's
loop and M&M). It seems that they must be chosen very carefully,
especially costas_alpha and gain_mu.
In order to choose them, I plugged a constellation sink into my modulator
using GRC. As the constellation sink is using synchronisation algorithm, I
was able to play with the synchronization parameters and see the
consequences on the constellation.

I would like to learn more about these two algorithms. Where can I find
some interesting reading on the internet?

Eg : for a d8psk, with no gray coding I used : alpha= 0.001 and gain_mu=0.005


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