扩频通信基于matlab扩频通信系统仿真【含Matlab源码 337期】.zip

%***********?‾????main.m*********** clear clc %N=input('walsh???℅??N='); N=16; for i=1:4 switch i case 1 %nA=input('???∫A????nA='); nA=fix(unifrnd(0,255));%?迆?迆????℅??????迆???? m=i+1; figure(1); [nA_2,ChannelA]=send_module(nA,N,m); case 2 %nB=input('???∫B????nB='); nB=fix(unifrnd(0,255));%?迆?迆????℅??????迆???? m=i+1; figure(2); [nB_2,ChannelB]=send_module(nB,N,m); case 3 %nC=input('???∫C????nC='); nC=fix(unifrnd(0,255));%?迆?迆????℅??????迆???? m=i+1; figure(3); [nC_2,ChannelC]=send_module(nC,N,m); case 4 %nD=input('???∫D????nD='); nD=fix(unifrnd(0,255));%?迆?迆????℅??????迆???? m=i+1; figure(4); [nD_2,ChannelD]=send_module(nD,N,m); otherwise disp('error'); end i=i+1; end figure(5); Channel=ChannelA+ChannelB+ChannelC+ChannelD; q=1:1:128*8; subplot(2,1,1); plot(q,Channel); title('????????') axis([1 1024 -5 5]) snr=0000.1; y = awgn(Channel,snr,'measured') ; subplot(2,1,2); plot(q,y); axis([1 1024 -15.5 15.5]) title('????????') for i=1:4; switch i case 1 m=i+1; figure(6); receiveA=receive_module(N,y,m); case 2 m=i+1; figure(7); receiveB=receive_module(N,y,m); case 3 m=i+1; figure(8); receiveC=receive_module(N,y,m); case 4 m=i+1; figure(9); receiveD=receive_module(N,y,m); otherwise disp('error'); end i=i+1; end %???赤?????‾ send=[nA_2;nB_2;nC_2;nD_2;] receive=[receiveA;receiveB;receiveC;receiveD;] count=0; for i=1:32 if send(i)~=receive(i) count=count+1; end end disp('?車??????');