数字通信QAM调制及其MATLAB仿真程序(共4页).doc

精选优质文档-倾情为你奉上数字通信QAM调制及其MATLAB仿真程序1. %数字通信QAM仿真2. clear3. %产生基带符号流4. M=16; %进制 16QAM5. N=40; %信源比特流长度,为保证对齐,选择是log2(M)的整倍数6. bitstream=zeros(1,N);7. symbolstream=zeros(1,N/log2(M);8. for n1=1:N9. bitstream(n1)=binornd(1,0.5,1,1);10. end11. %格雷码编码12. for n1=1:length(symbolstream)13. pack=bitstream(4*(n1-1)+1) bitstream(4*(n1-1)+2) bitstream(4*(n1-1)+3) bitstream(4*(n1-1)+4);14. ifpack=0 0 0 015. symbolstream(n1)=1+j;16.