Matlab仿真: 1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真
2007-12-11 16:11阅读：
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%=======================
%1,2,5,2kHz锯齿波的产生:
clear;clc;
f_tri=1
figure(1)
t=[0:0.01:1];
y=sawtooth(2*pi*f_tri*t,1);
subplot(2,2,1)
plot(t,y)
title('1Hz -- 锯齿波形')
%--------
f_tri=2
t=[0:0.00001:1];
y=sawtooth(2*pi*f_tri*t,1);
subplot(2,2,2)
plot(t,y)
title('2Hz -- 锯齿波形')
%--------
f_tri=5
t=[0:0.00001:1];
y=sawtooth(2*pi*f_tri*t,0);
subplot(2,2,3)
plot(t,y)
title('5Hz -- 锯齿波形')
%--------
f_tri=2000
t=[0:0.00001:1];
y=sawtooth(2*pi*f_tri*t,1);
subplot(2,2,4)
plot(t,y)
title('2kHz -- 锯齿波形')
%--------
%查看2kHz -- 锯齿波的2个三角波形
f_tri=2000
TDu=0.001
t=[0:0.00001:TDu];
y=sawtooth(2*pi*f_tri*t,1);
figure(2)
plot(t,y)
title('2kHz -- 查看2个锯齿波形')
%--------
%查看2kHz -- 锯齿波的10个三角波形
f_tri=2000
TDu=0.005
t=[0:0.00001:TDu];
y=sawtooth(2*pi*f_tri*t,1);
%y=sawtooth(2*pi*f_tri*t,0);%反方向的锯齿波形
figure(3)
plot(t,y)
title('2kHz -- 锯齿波的10个波形')
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%====================================
%
% 1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真
%====================================
%=======================
%1Mhz正弦载波产生,查看2个锯齿波形的调制
%==================================
%1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真:查看2个锯齿波形的调制
plot(t,UDSB)
axis([0 TDu -1.1 1.1 ])
title('1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真--2个波形')
%=========================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%=======================
%1Mhz正弦载波产生,查看10个锯齿波形的调制
%==================================
%1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真:查看10个锯齿波形的调制
plot(t,UDSB)
axis([0 TDu -1.1 1.1 ])
title('1Mhz正弦载波与2kHz锯齿波调制信号进行调制仿真--10个波形')