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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