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【MATLAB】MATLAB 仿真数字带通传输系统 — ASK、 PSK、 FSK 系统
2022-07-04 03:55:00 【嵌入式职场】
目录
1、ASK、 PSK、 FSK 系统
clear all;
clc;
A = 1; %载波幅度
fc = 4; %载波频率
N_sample = 20;
Ts = 1; %码元间隔
dt = Ts/(fc*N_sample); %波形采样间隔
N = 1000; %码元个数
t = 0:dt:(N*Ts-dt);
T = dt*length(t);
Lt = length(t);
% ======== 基带信号 ========
d = sign(randn(1,N)); %生成双极性码
dd = sigexpand((d+1)/2,fc*N_sample);%生成单极性码并插值
gt = ones(1,fc*N_sample); %NRZ 波形
d_NRZ = conv(dd,gt);
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