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【MATLAB】MATLAB 仿真模拟调制系统 — DSB 系统
2022-07-04 03:55:00 【嵌入式职场】
目录
1、DSB 系统
close all;
clear all;
clc;
fm = 1; %信源最高频率
fc = 10; %载波中心频率
dt = 0.001; %时间采样间隔
T = 5; %信号时长
t = 0:dt:T;
mt = cos(2*pi*fm*t); %基带信号
%DSB 已调信号
s_dsb = mt.*cos(2*pi*fc*t);
% %生成窄带高斯白噪声
% B = 2*fm;
% N0 = 0.01; %白噪单边功率谱密度
% noise = noise_nb(fc,B,N0,t);
% s_dsb = s_dsb+noise;
figure(1);
subplot(2,1,1); plot(t,mt,'b-');
xlabel('t (s)'); title('基带信号');
grid on;
subplot(2,1,2); plot(t,s_dsb,'b-');
hold on; plot(t,mt,'r:');
xlabel('t
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