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Re: [Discuss-gnuradio] Galois-form LFSR now in trunk (r4613)

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Galois-form LFSR now in trunk (r4613)
Date: Fri, 23 Feb 2007 12:30:37 -0800
User-agent: Thunderbird (X11/20070103)

Eric Blossom wrote:

> Looks like this needs some QA code.
> The original version probably didn't _really_ generate an m-sequence ;)

The QA code is there; it actually checks for the proper auto-correlation
properties for all sequences of degree 1 through 11, which implies the
length calculation is correct also. Since the auto-correlation is done
naively and in Python, it's dog slow, and anything longer than 2047
starts to take many seconds to complete.

I'll add some QA code that only instantiates the block and asks it what
length it thinks it's going to have. The bug Trond identified would only
have created a problem with a sequence of degree 32.

Johnathan Corgan
Corgan Enterprises LLC

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