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Re: [Discuss-gnuradio] Very low packet loss rate for the discontinuous B

From: Sreeraj Rajendran
Subject: Re: [Discuss-gnuradio] Very low packet loss rate for the discontinuous BPSK communications- the analysis and looking for solution
Date: Wed, 6 Mar 2013 19:42:33 +0800 (SGT)

>>I don't believe this problem can be solved by adjusting the loop bandwidth.

Acquisition time is roughly inversely proportional to loop_bw and error variance is proportional to loop_bw. So there is always a tradeoff between acquisition time and tracking performance. You should try adjusting loop_bw (http://www.trondeau.com/blog/2011/8/13/control-loop-gain-values.html).

>>Applying faster tracking algorithm may solve this problem, but I think it takes long time to develop for a new guy.

If you have a good understanding of the algorithm, its really easy to prototype the alogorithm in GRC or  by using gnuradio python-block coding support. "gr_modtool" is always there to make block coding easier.


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