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[Discuss-gnuradio] GMSK minimum bitrate
From: |
Håvard Espeland |
Subject: |
[Discuss-gnuradio] GMSK minimum bitrate |
Date: |
Tue, 8 May 2007 22:49:30 +0200 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
We're writing a gmsk radio module with low bitrate (<5 kbps) and
continuous constant bitrate transmission using Gnuradio 3.0.3 and USRP.
The code is based on the digital/tx_voice.py example, and I have two
unanswered questions.
By hacking on the example, pick_bitrate fails to return a lower bitrate
than 35.714kb/sec. Is it possible to support a precisely defined lower
bitrate, or is there a technical limitation?
Another issue is underflow handling. Is there a way to gracefully
detect and handle underflow if the producer (codec) lacks behind or
stops? If unhandled, we would loose syncronization with the receiver.
--
Håvard Espeland
- [Discuss-gnuradio] GMSK minimum bitrate,
Håvard Espeland <=