Rayleigh Channel power normalization

Vladislav Borchsh

2020 11 16

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2 次查看（30 天）

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I have to use a Raleign channel as built-in function. And there some misunderstanding.

I set zero-delay and zero-gain for that channel. So, I expect the channel witouh fading, because all parameters is zero. Code here:

clear all
close all
clc
Fs = 72e6;
M = 4;
dpskMod = comm.DPSKModulator('ModulationOrder', M);
dpskDemod = comm.DPSKDemodulator('ModulationOrder', M);
numBits = 1000; % Each trial uses 10000 bits.
numTrials = 10;  % Number of BER computations
PathDelays = [0]*1e-9;
PathGains = [0];
rayleighCh = comm.RayleighChannel(...
    'SampleRate', Fs, ...
    'PathDelays', PathDelays, ...
    'AveragePathGains', PathGains, ...
    'NormalizePathGains', true, ...
    'MaximumDopplerShift', 0, ...
    'PathGainsOutputPort', true);
nErrors = zeros(1,numTrials);
for n = 1:numTrials
   tx = randi([0 M-1],numBits,1);
   dpskSig = dpskMod(tx);
   [fadedSig, pg] = rayleighCh(dpskSig);
end
disp(pg(1));