[matlab] matlab simulation modulation system - VSB system

Catalog

1、VSB System

2、 Program run results

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1、VSB System

close all;
clear all;
clc;
fm = 5; % The highest frequency of baseband signal 
fc = 20; % Carrier center frequency 
dt = 0.001; % Time sampling interval 
T = 5; % Signal duration 
t = 0:dt:T;
mt = sqrt(2)*( cos(2*pi*fm*t) + sin(2*pi*0.1*fm*t) );
%VSB  modulation 
s_vsb = mt.*cos(2*pi*fc*t);
[f,sf] = T2F(t,s_vsb);
[t,s_vsb] = vsbpf(f,sf,0.2*fm,fm,fc);
figure;
subplot(3,1,1); plot(t,s_vsb,'b-');
hold on; plot(t,mt,'r:');
title('VSB  Modulated signal ');
xlabel('t (s)'); grid on;
% VSB  Power spectrum of modulated signal 
[f,sf] = T2F(t,s_vs