(7,4) HAMMING coding.rar_7 4汉明码_Hamming (7_4) code._alikecmf_汉明码

%（7，4）HAMMING码系统仿真结果与未编码的比较main_ce55_74.m %仿真序列长度2*10^4，运行时间约2分钟。仿真序列长度10^5，运行时间约20分钟 echo on SNRindB55741=0:1:10; SNRindB55742=0:1:10; smld_err_prb55=zeros(1,length(SNRindB55741)); smld_err_prb74=zeros(1,length(SNRindB55741)); SNR5574=0; theo_err_prb5574=zeros(1,length(SNRindB55742));% for i=1:length(SNRindB55741) smld_err_prb55(i)=smldPe55(SNRindB55741(i)); smld_err_prb74(i)=smldPe55_74(SNRindB55741(i)); end for i=1:length(SNRindB55742) SNR5574=exp(SNRindB55742(i)*log(10)/10); theo_err_prb5574(i)=(1/2)*erfc(sqrt(2*SNR5574)/sqrt(2)); %Qfunct y=(1/2)*erfc(x/sqrt(2)); %theo_err_prb(i)=Qfunct(sqrt(2*SNR)); end %[p_err_ha,gamma_db_ha]=p_e_hd_a(5,16,4,7,3); %p_e_hd_a.m 硬判决性能估计函数 %[p_err_sa,gamma_db_sa]=p_e_sd_a(5,16,4,7,3); %p_e_sd_a.m 软判决性能估计函数 %绘图语句 figure; semilogy(SNRindB55741,smld_err_prb55,'b*-'); hold on axis([0,10,1e-5,1]); xlabel('Eb/N0(dB)'); ylabel('BER'); title('(7,4)HAMMING码，未编码与理论值的仿真结果比较'); semilogy(SNRindB55741,smld_err_prb74,'ro-'); semilogy(SNRindB55742,theo_err_prb5574,'bs:'); %semilogy(gamma_db_ha,p_err_ha,'g'); %semilogy(gamma_db_sa,p_err_sa,'m'); legend('未编码','(7,4)HAMMING码','理论值'); %ce55_74.m 仿真绘图语句