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Re: [Discuss-gnuradio] noise level estimation

From: Martin Braun
Subject: Re: [Discuss-gnuradio] noise level estimation
Date: Mon, 9 Feb 2009 12:49:00 +0100
User-agent: Mutt/1.5.17 (2007-11-01)

On Sun, Feb 08, 2009 at 07:36:28PM -0500, Ran Tian wrote:
> HI,
> Could anyone help me with noise level Estimation using the GNU Radio block
> gr.null_source (float [gr_complex])
> I just want to send a constant zero signal an drecord the output.
> How to write this simple flow graph?

Probably best not to write it at all. Just assign a variable the value
0. If you use this as an estimator, it will have exactly the same mean
and variance as the null source [1].

But seriously, I assume you mean something else. I recommend reading
that, should cover the basics (assuming you want to use Python).


[1] They are both zero, by the way.

Dipl.-Ing. Martin Braun           Phone: +49-(0)721-608 3790
Institut fuer Nachrichtentechnik  Fax:   +49-(0)721-608 6071
Universitaet Karlsruhe (TH)       http://www.int.uni-karlsruhe.de/

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