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Re: [Discuss-gnuradio] BER over air

From: Marcus Müller
Subject: Re: [Discuss-gnuradio] BER over air
Date: Sun, 28 Dec 2014 18:31:18 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0

Hello Mostafa,

I've forgot to add that
> All nonlinear and time variant effects isn't just due to the channel
> but the RF hardware.
is usually not true -- again, SNR is signal to noise, and maybe your
signal undergoes correction, and I don't know if that is going to be
Far more importantly, real radio channels *are not* flat. They are
frequency-selective, and they are time-variant. In many (easier) cases,
you can consider the channel to be flat for your very limited bandwidth,
and you can consider it's properties (or at least the statistical
properties of these properties) to be stationary -- but if you're
serious about channel characteristics, you can't just say "my channel is
flat and time-invariant", without really saying why you can make these


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