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Re: [Discuss-gnuradio] DBSRX used for GPS: cycle slip

From: Chris Stankevitz
Subject: Re: [Discuss-gnuradio] DBSRX used for GPS: cycle slip
Date: Mon, 02 Jun 2008 18:54:19 -0700
User-agent: Thunderbird (Windows/20070326)

Heckler, Gregory W. (GSFC-596.0) wrote:
I was referring to the Doppler estimate output by your PLL over time (traditional tracking), whereas you indicated that you were looking at repeated acquisition attempts.


While performing traditional tracking with a PLL using "prompt" accumulations, I noticed my PLL could not keep track. As a debugging tool I conducted repeated acquisitions and it was there I noticed that the freq was suddently changing -- aha the source of my PLL problem!

This image should give you an idea of what we are doing. It's a matlab plot of various outputs from our traditional tracker.


Thanks, I will take a look at the frequency being passed to DBSRX.


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