[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] Re: FSK now (really) working at 100kbit/sec
From: |
Matt Ettus |
Subject: |
Re: [Discuss-gnuradio] Re: FSK now (really) working at 100kbit/sec |
Date: |
Fri, 15 Apr 2005 09:46:26 -0700 |
User-agent: |
Internet Messaging Program (IMP) 4.0-cvs |
Quoting Deqiang chen <address@hidden>:
> hello, Eric,
>
> I remembered there is an annoucement that FSK can work at 100kbps.
> So I dig it out and take a look at the source code for the FSK ( fsk_rx.py)
> . I am a little surprised
> that there are no time recovery there. My understanding is that for fsk, if
> you
> use noncoherent demodulation, you would not need the phase information.
> However, you still need to know the timing in order to correctly sampling
> the output of correlator or matched filter.
> Could you give a hint of what is going on here ?
The timing recovery is happening in the gr.simple_correlator. It finds the
sampling point by doing a correlation on the preamble.
Matt
Re: [Discuss-gnuradio] No module named wx, Eric Blossom, 2005/04/14
Re: [Discuss-gnuradio] No module named wx, Angilberto Muniz Sb, 2005/04/15