matlab分集仿真报告.docxVIP

分集matlab仿真实验报告 学院：电子信息工程学院班级：通信1106班姓名：胡梦春学号导教师：杨维老师 时间：2014年5月27日分集MATLAB仿真报告要求现给出最大比合并（MRC）、等增益合并（EGC）和选择性合并的分集合并程序，理解各程序，完成以下习题。将程序运行结果及各题目的解答写入word中：1. 用matlab分别运行“BPSKMRC.m”、“BPSKEGC.m”以及“BPSKSEL.m”（a）在程序中标注“注释”处加上注释（英文或中文）①BPSKMRC.m% bpsk.m% Simulation program to realize BPSK transmission system%************* Preparation part ***********nd = 10000; % Number of symbols that simulates in each loopsnr_in_dB=[0:15] ; ber=zeros(1,length(snr_in_dB));forsnr_num=1:length(snr_in_dB) SNR=exp(snr_in_dB(snr_num)*log(10)/10);%************* START CALCULATION ************nloop=100; % Number of simulation loopsnoe = 0; % Number of error datanod = 0; % Number of transmitted datafor iii=1:nloop%********* Data generation ************* data1=rand(1,nd)0.5; data2=2.*data1-1;%******* Attenuation Calculation ******%********** rayleigh channel ******code_rate=1;E=1;sigma=E/sqrt(2*SNR*code_rate); n =[randn(1,nd) + j*randn(1,nd)]; h1 =1/sqrt(2)*[randn(1,nd) + j*randn(1,nd)]; % Rayleigh channel data41=data2.*h1+sigma.*n; h11=conj(h1); %注释：取h1的共轭data411=data41.*h11; %注释：最大比值合并，每条支路加权系数与本条支路信号幅度成正比%*********************** n =[randn(1,nd) + j*randn(1,nd)]; h2 =1/sqrt(2)*[randn(1,nd) + j*randn(1,nd)]; % Rayleigh channel data42=data2.*h2+sigma.*n; h22=conj(h2); data422 =data42.*h22; %*********data4=data411+data422;%注释：将加权后的各支路信号进行合并%********* BPSK Demodulation *******demodata1=data4 0; %**********Bit Error Rate (BER) ******* noe2=sum(abs(data1-demodata1)); nod2=length(data1); noe=noe+noe2;nod=nod+nod2;end%**********Output result ***********ber(snr_num) = noe/nod end; %********* end of file ************figure;semilogy(snr_in_dB,ber,O-) %注释：画出实际误码率曲线hold onsemilogy(snr_in_dB,0.5*erfc(sqrt(2*10.^(snr_in_dB/10))/sqrt(2)),+-);%注释：画出高斯信道理论误码率曲线hold onsemilogy(snr_in_dB,0.5.*(1-sqrt((10.^(snr_in_dB/10))./(10.^(snr_in_dB/10)+1))),-);%注释：画出瑞利信道理论误码率曲线ylabel(BER);xlabel(E_b/N_0 [dB]);legend(simulation BPSK MRC L=2,theory gngaussBPSK,theoryreyleigh ); %%%%%%%%%%%%%%%%%②BPSKEGC.