21 lines
649 B
Matlab
Executable File
21 lines
649 B
Matlab
Executable File
function out_signal = rx_channel_est(signal,uw)
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% MMSE频域均衡函数
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% 输入序列x为去掉CP后的接受序列，设其长度为L;
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% uw为系统中使用的独特字序列,长度为uw_num;
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% 输出序列y为经过FDE后的输出序列,长度为L-uw_num。
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%
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L = size(signal,2); %求输入序列的长度;
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uw_num = size(uw,2); %求独特字的长度;
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sigstmp(1,:) = signal(1,(uw_num+1):end); %提取数据信息流;
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uwstmp(1,:) = signal(1,1:uw_num); %提取独特字序列;
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H = fft(uwstmp)./fft(uw);
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h = ifft(H);
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u = [h,zeros(1,L-2*uw_num)];
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U = fft(u);
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W = conj(U)./(U.*conj(U));
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Sig = fft(sigstmp);
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Y = W.*Sig;
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out_signal = ifft(Y);
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end
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