chn_simu

Radio channel simulation (noise, phase error, frequency error, ...)

Calling sequence

y = chn_simu(x,prm);

Parameters

x:

input RF signal

prm:

structure defining the channel parameters (can be initialized with chn_simu_prm)

y:

output, distorted, RF signal

Description

This function simulates various distortions than can arise through a radio propagation channels. The parameter structure enables to specify the different possible distortions is documented here.

Example

prm = chn_simu_prm();
// Add white noise
prm.sigma_wn = .1;
mod = mod_init('qpsk',fs=1e6,fi=100e3,fsymb=10e3,'c');
[mod,x] = mod_process(mod,prbs(nsymb=100));
scf(0); clf(); plot_const(x); xtitle("Before channel");
x = chn_simu(x,prm);
scf(1); clf(); plot_const(x); xtitle("After channel");

Before and after channel simulation

Examples




See also