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Re: [Discuss-gnuradio] BER AWGN example - question
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From: |
Martin Braun (CEL) |
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Subject: |
Re: [Discuss-gnuradio] BER AWGN example - question |
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Date: |
Sun, 8 Dec 2013 15:48:57 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Sat, Dec 07, 2013 at 02:26:18PM +0100, address@hidden wrote:
> Could you explain how the converting the EbNo value to the noise
> voltage in the following example is done?
> http://gnuradio.org/redmine/projects/gnuradio/repository/entry/gr-digital/examples/berawgn.py
>
> I can see that there is a function (EbNo_to_noise_voltage)
> responsible for that but I have problem with understanding where
> this equation came from. Could you possibly explain it to me or at
> least recommend some book where I can find the solution?
Given an E_b of 1, what is the noise *voltage* (i.e. the expected
amplitude of the AWGN process) that will cause an E_b / N_0 of x, if E_b
/ N_0 is given in dB?
If you take pencil and paper, and solve for the noise voltage, you'll
get this equation.
MB
--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)
Dipl.-Ing. Martin Braun
Research Associate
Kaiserstraße 12
Building 05.01
76131 Karlsruhe
Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu
KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association
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