Thanks for your reply Tom. Could I have some more explanation on it? if a training sequence at start of each burst could help in fast convergence for burst modem?
-- Bob On Mon, May 12, 2014 at 6:01 AM, Tom Rondeau <[email protected]> wrote: > On Mon, May 12, 2014 at 5:59 AM, bob wole <[email protected]> wrote: > >> I want to work on equalization for ISI removal due to multipaths for >> burst frequency shift keying system. I found equalizer class in gnruadio, I >> want to know if somebody used cma_equalizer for the task with success or if >> I can use it for equalization of burst frequency shift keying system before >> continuing with it? >> >> >> Thanks >> >> -- >> Bob >> > > It'll conceivably work, but the challenge with the CMA equalizer (and the > LMS-DD equalizer as well) is the long convergence time. Between every > burst, you're going to lose tracking of the taps, so you might want to > think of a way to shut down the tap update loop when you're not receiving a > packet (which involves knowing when that's happening in time to send the > info to the equalizer). For starters, just use a few taps in the equalizer > and a gain higher than you would expect to see if you can get it to > converge to "close enough" early in the burst. > > Tom >
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