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Re: [Discuss-gnuradio] change bitrate dynamically in tunnel.py

From: Tom Rondeau
Subject: Re: [Discuss-gnuradio] change bitrate dynamically in tunnel.py
Date: Mon, 9 Jan 2012 19:37:56 -0500

On Mon, Jan 9, 2012 at 2:24 AM, Kouta NISHIDA <address@hidden> wrote:
Hi all,

Now I use tunnel.py with USRP2.

I set bitrate when I run tunnel.py.
I cannot change the bitrate until I finish tunnel.py.
But, I want to change bitrate dynamically when I am running tunnel.py.

Does anyone know the ways to change bitrate dynamically?


Hi Kouta,
It's not set up to work that way right now, but you should be able to hack it to do what you want.

There are a couple of settings that affect the bitrate: the rate of the USRP and the number of samples per symbol (sps). In the current implementations of the PSK modulations, you can set a real number for the sps, so you should be able to change that to affect the bit rate. But remember, look for any place that is used since you'll have to also reset the taps for the filters on both the RX and TX sides.

You can also set the sample rate of the USRP as well to affect this.

Let us know how you do with this.


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