1.完整项目描述和程序获取
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2.部分仿真图预览
3.算法概述
在通信系统中,在基带系统中插入均衡器能够减小码间干扰的影响。均衡器(equalizer) 通信系统中,校正传输信道幅度频率特性和相位频率特性的部件。将频率为f的正弦波送入传输信道,输出电压与输入电压的幅度比随f变化的特性称为幅度频率特性,简称幅频特性;输出电压与输入电压间的相位差随f变化的特性称为相位频率特性,简称相频特性。
4.部分源码
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SNR = 30;
train_code_num = 500;
info_code_num = 5000;
code_num = train_code_num + info_code_num;
[ src_codes ] = bitsgen( code_num );
[ response_codes ] = channel( 21,128,SNR,src_codes );
.............................................................
figure
subplot(2,3,1)
plot(I,Q,'b.',...
'LineWidth',1,...
'MarkerSize',6,...
'MarkerEdgeColor','k',...
'MarkerFaceColor',[0.0,0.9,0.0]);
axis([-2,2,-2,2])
I = real(response_codes(train_code_num+1:end-FrontOrder+1))/std(real(response_codes(train_code_num+1:end-FrontOrder+1)));
Q = imag(response_codes(train_code_num+1:end-FrontOrder+1))/std(imag(response_codes(train_code_num+1:end-FrontOrder+1)));
subplot(2,3,2)
plot(I,Q,'b.',...
'LineWidth',1,...
'MarkerSize',6,...
'MarkerEdgeColor','g',...
'MarkerFaceColor',[0.0,0.9,0.0]);
axis([-4,4,-4,4])
I = real(am_xEst(train_code_num+1:end))/std(real(am_xEst(train_code_num+1:end)));
Q = imag(am_xEst(train_code_num+1:end))/std(imag(am_xEst(train_code_num+1:end)));
title(['SNR=',num2str(SNR)])
subplot(2,3,3)
plot(I,Q,'b.',...
'LineWidth',1,...
'MarkerSize',6,...
'MarkerEdgeColor','r',...
'MarkerFaceColor',[0.0,0.9,0.0]);
axis([-2,2,-2,2])
subplot(2,3,[4,5,6])
plot(ee);
A592