On Wed, Dec 30, 2015 at 5:33 AM, Marcus Müller <marcus.muel...@ettus.com> wrote:
> I must admit I did that, but feel unsure about how many sines I'd need to > use to simulate spread. > The result I got with 8 and standard doppler spread don't look overly > healthy, and osmocore/gr-gsm has a hard time understanding noise-free > synthetic bcch bursts after going through the fading model. > Any advice on that? > > Best regards, > Marcus Talk to Tom Tsou and show him your results. He has a lot of experience looking at these things and should be able to tell you within a few orders of magnitude* if they look at all reasonable. Tom * "Few orders" is kind of a joke. But not entirely. > Am 29. Dezember 2015 22:16:53 MEZ, schrieb Johnathan Corgan < > johnat...@corganlabs.com>: >> >> On Tue, Dec 29, 2015 at 11:50 AM, Marcus Müller <marcus.muel...@ettus.com >> > wrote: >> >> >>> ETSI TS 145 005 V[1] specifies the relevant GSM channel models. >>> >>> I do have a bit of python code that converts those to 10MS/s sampled >>> FIRs. Should I just add something to gr-channels python code that gives >>> you FIR taps for different of these models? >>> >> >> It would be useful to see how well the Annex C tables can be mapped to >> the Frequency Selective Fading Model block parameters and do some resulting >> simulations with these. The block simulates the time-varying effects of >> doppler and Rician/Rayleigh fading given a power delay profile and other >> relevant parameters. >> >> >> -- >> Johnathan Corgan >> Corgan Labs - SDR Training and Development Services >> http://corganlabs.com >> > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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