CCS - Digital Transmission via Carrier Modulation - Carrier-Phase Modulation

Carrier-Phase Modulation

We observe that binary phase modulation is identical to binary PAM (binary antipodal signals).

Matlab Coding

 1 % MATLAB script
 2 echo on
 3 T=1;
 4 M=8;
 5 Es=T/2;
 6 fc=6/T;                    % carrier frequency
 7 N=100;                    % number of samples
 8 delta_T=T/(N-1);
 9 t=0:delta_T:T;
10 u0=sqrt(2*Es/T)*cos(2*pi*fc*t);
11 u1=sqrt(2*Es/T)*cos(2*pi*fc*t+2*pi/M);
12 u2=sqrt(2*Es/T)*cos(2*pi*fc*t+4*pi/M);
13 u3=sqrt(2*Es/T)*cos(2*pi*fc*t+6*pi/M);
14 u4=sqrt(2*Es/T)*cos(2*pi*fc*t+8*pi/M);
15 u5=sqrt(2*Es/T)*cos(2*pi*fc*t+10*pi/M);
16 u6=sqrt(2*Es/T)*cos(2*pi*fc*t+12*pi/M);
17 u7=sqrt(2*Es/T)*cos(2*pi*fc*t+14*pi/M);
18 u8=sqrt(2*Es/T)*cos(2*pi*fc*t+16*pi/M);
19 
20 % plotting commands follow
21 subplot(9,1,1);
22 plot(t,u0);
23 subplot(9,1,2);
24 plot(t,u1);
25 subplot(9,1,3);
26 plot(t,u2);
27 subplot(9,1,4);
28 plot(t,u3);
29 subplot(9,1,5);
30 plot(t,u4);
31 subplot(9,1,6);
32 plot(t,u5);
33 subplot(9,1,7);
34 plot(t,u6);
35 subplot(9,1,8);
36 plot(t,u7);
37 subplot(9,1,9);
38 plot(t,u8);

Simulation Result

Reference,

　　1. <<Contemporary Communication System using MATLAB>> - John G. Proakis

标签：subplot,plot,via,Modulation,fc,Carrier,sqrt,pi,Es
来源： https://www.cnblogs.com/zzyzz/p/13688320.html