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1、本科毕业设计IS-95前向链路通信系统的设计与仿真(附录）姓名李家蓬学院信息与电气工程学院专业电子信息工程专业年级2008级学号20082312608指导教师王丽丽2012年5月21日IS-95系统仿真源程序%main_IS95_forward.m%此函数用于IS-95前向链路系统的仿真，包括扩%频调制，匹配滤波，RAKE接收等相关通信模块。%仿真环境:加性高斯白噪声信道.%数据速率=9600KBps%clearallcloseallclcdisp('--------------start-------------------'
2、);globalZiZqZsshowRGiGqclearj;show=0;SD=0;%选择软/硬判决接收%-------------------主要的仿真参数设置------------------BitRate=9600;ChipRate=1228800;N=184;MFType=1;%匹配滤波器类型--升余弦R=5;%+++++++++++++++++++Viterbi生成多项式++++++++++++++++++G_Vit=[111101011;101110001];K=size(G_Vit,2);L=size(G_Vit
3、,1);%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++++++Walsh矩阵++++++++++++++++++++++++WLen=64;Walsh=reshape([1;0]*ones(1,WLen/2),WLen,1);%Walsh=zeros(WLen,1);%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++扩频调制PN码的
4、生成多项式++++++++++++++%Gi=[1010001110100001]';%Gq=[1001110001111001]';Gi_ind=[15,13,9,8,7,5,0]';Gq_ind=[15,12,11,10,6,5,4,3,0]';Gi=zeros(16,1);Gi(16-Gi_ind)=ones(size(Gi_ind));Zi=[zeros(length(Gi)-1,1);1];%I路信道PN码生成器的初始状态Gq=zeros(16,1);Gq(16-Gq_ind)=ones(size(Gq_ind));Z
5、q=[zeros(length(Gq)-1,1);1];%Q路信道PN码生成器的初始状态%++++++++++++++++++++++++++++++++++++++++++++++++++++++%+++++++++++++++++++扰码生成多项式++++++++++++++++++++++Gs_ind=[42,35,33,31,27,26,25,22,21,19,18,17,16,10,7,6,5,3,2,1,0]';Gs=zeros(43,1);Gs(43-Gs_ind)=ones(size(Gs_ind));Zs=[z
6、eros(length(Gs)-1,1);1];%长序列生成器的初始状态%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++++++AWGN信道++++++++++++++++++++++++EbEc=10*log10(ChipRate/BitRate);EbEcVit=10*log10(L);EbNo=[-2:0.5:6.5];%仿真信噪比范围(dB)%EbNo=[2:0.5:2.5];%++++++++++++++++++++++
7、++++++++++++++++++++++++++++++++%------------------------------------------------------%-------------------------主程序-------------------------ErrorsB=[];ErrorsC=[];NN=[];if(SD==1)fprintf('SOFTDecisionViterbiDecoder');elsefprintf('HARDDecisionViterbiDecoder
8、');endfori=1:length(EbNo)fprintf('Processing%1.1f(dB)',EbNo(i));iter=0;ErrB=0;ErrC=0;while(ErrB<300)&(iter<150)drawnow;%+++++++++
