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Re: [Discuss-gnuradio] bell 202 modulation
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] bell 202 modulation |
Date: |
Tue, 28 Mar 2006 14:50:31 -0800 |
User-agent: |
Mutt/1.5.9i |
On Tue, Mar 28, 2006 at 11:51:03PM +0200, Matteo Campanella wrote:
> Hello, I am trying to find the best way to implement a bell 202 modem in
> gnuradio. The problem I am facing is that I need to produce two tones, one
> for mark and one for space, and I have to switch from one to other
> depending on which symbol I am sending. The duration of the tone (or tone
> switch) must be set exactly according to the baud rate of 1200 I have to
> produce.
>
> I was thinking to use the nco class to generate the tones, and to output n
> samples per symbol at a certain fixed sample rate that would be enough for
> the 1200 baud, let´s say the standard audio 48000.
>
> Has anyone better suggestions to work this out?
>
> MC
Use the gr.frequency_modulator_fc block to generate complex baseband FSK.
You'll probably want to use gr.bytes_to_syms to in front of it, or in
the more general case: gr.packed_to_unpacked followed by
gr_chunks_to_symbols_bf.
Eric
- [Discuss-gnuradio] bell 202 modulation, Matteo Campanella, 2006/03/28
- Re: [Discuss-gnuradio] bell 202 modulation, Marcus Leech, 2006/03/28
- Re: [Discuss-gnuradio] bell 202 modulation,
Eric Blossom <=
- Re: [Discuss-gnuradio] bell 202 modulation, Matteo Campanella, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Eric Blossom, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Robert McGwier, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Matteo Campanella, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Robert McGwier, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Matteo Campanella, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Gregg Levine, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, John Ackermann N8UR, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Matteo Campanella, 2006/03/29
- Re: [Discuss-gnuradio] bell 202 modulation, Eric Blossom, 2006/03/29