资源描述：
《基于MATLAB地CDMA系统仿真.doc》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。
1、基于MATLAB的CDMA系统仿真姓名：班级：学号：指导老师：日期：作业要求1.分析附录的源程序，逐行给出中文注释，并分析仿真结果。2.按照下列框图设计一个CDMA系统，并进行仿真。信源卷积编码交织编码加扰码扩频调制AWGN信道调制解扩信宿解卷积解交织去扰码1.分析附录的源程序，逐行给出中文注释，并分析仿真结果。%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%
2、clearallcloseallclcdisp('--------------start-------------------');globalZiZqZsshowRGiGqclearj;show=0;%控制程序运行中的显示SD=0;%选择软/硬判决接收%-------------------主要的仿真参数设置------------------BitRate=9600;%比特率ChipRate=1228800;%码片速率N=184;%源数据数MFType=1;%匹配滤波器类型--升余弦R=5;%+++++
3、++++++++++++++Viterbi生成多项式++++++++++++++++++G_Vit=[111101011;101110001];%Viterbi生成多项式矩阵K=size(G_Vit,2);%列数L=size(G_Vit,1);%行数%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++++++Walsh矩阵++++++++++++++++++++++++WLen=64;%walsh码的长度Wals
4、h=reshape([1;0]*ones(1,WLen/2),WLen,1);%32个10行%Walsh=zeros(WLen,1);%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++扩频调制PN码的生成多项式++++++++++++++%Gi=[1010001110100001]';%Gq=[1001110001111001]';Gi_ind=[15,13,9,8,7,5,0]';%i路PN码生成多项式参数G
5、q_ind=[15,12,11,10,6,5,4,3,0]';%q路PN码生成多项式参数Gi=zeros(16,1);%16×1的0矩阵Gi(16-Gi_ind)=ones(size(Gi_ind));%根据Gi_ind配置i路PN码生成多项式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);%16×1的0矩阵Gq(16-Gq_ind)=ones(size(Gq_ind));%根据Gq_ind配置q路PN码生成多项式Zq=[zeros(l
6、ength(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);%43×1的0矩阵Gs(43-Gs_ind)=ones(size(Gs_i
7、nd));%根据Gs_ind配置扰码生成多项式Zs=[zeros(length(Gs)-1,1);1];%长序列生成器的初始状态%++++++++++++++++++++++++++++++++++++++++++++++++++++++%++++++++++++++++++++++AWGN信道++++++++++++++++++++++++EbEc=10*log10(ChipRate/BitRate);%处理增益EbEcVit=10*log10(L);EbNo=[-2:0.5:6.5];%仿真信噪比范围(
8、dB)%EbNo=[-2:0.5:-1.5];%++++++++++++++++++++++++++++++++++++++++++++++++++++++%------------------------------------------------------%-------------------------主程序-------------------------ErrorsB=[];ErrorsC=[]
