Hi Adrian, On 07/06/2016 09:20 PM, Adrian Musceac wrote: > I have read your blog posts about the 2400B modem, but I would really > like to understand more, like what kind of filters do you use for > pulse shaping and how do they affect performance/bandwidth, how do you > track the carrier frequency and correct frequency and phase errors. > This does not seem to be explained anywhere (I know I could just look > at the code, but reading an explanation seems easier :) ) >
I can help you with that one (I was curious as well): The waveform is just a square manchester encoding. Any filtering will come from the transceivers. I have not yet tested it, but my gut feeling says some pulse shaping (even just a sine table) would probably improve the error rate a bit. Regards, Jeroen ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
