Re: [Discuss-gnuradio] Channel Model and SNR

[Francisco Albani]

1) The last time I checked the code, I arrived at the same conclusion.

2) Its just a name for a complex number in which the real and imaginary parts are taken from a gaussian distribution. I think it comes from the fact that a 2D gaussian random vector radius has Rayleigh distribution.

You didn't asked, but just in case you find this in the future: the relation between the N_0 parameter of a continuum white noise model and the SNR (or variance) of its discrete counterpart is not trivial.

2015-07-25 20:38 GMT-03:00 Richard Bell <address@hidden>:

I'm trying to figure out how to convert the channel model noise voltage value into an SNR value for a simulation I'm making. The user wants to be able to enter an SNR value and simulate the BER. So I'm looking at the source code for Channel Model, and two things happen:

1) I would conclude that the Noise Voltage value corresponds to the standard deviation of the noise that will be produced, am I correct?

 

2) A question arises, why does gnuradio call rayleigh_complex() to produce Gaussian noise?

Thanks,

Rich

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