21 lines
649 B
Matlab
21 lines
649 B
Matlab
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function out_signal = rx_channel_est(signal,uw)
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% MMSEƵ<45><C6B5><EFBFBD><EFBFBD><EFBFBD>⺯<EFBFBD><E2BAAF>
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% <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>xΪȥ<CEAA><C8A5>CP<43><50><EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD>䳤<EFBFBD><E4B3A4>ΪL;
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% uwΪϵͳ<CFB5><CDB3>ʹ<EFBFBD>õĶ<C3B5><C4B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD>Ϊuw_num;
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% <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>yΪ<79><CEAA><EFBFBD><EFBFBD>FDE<44><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD>ΪL-uw_num<75><6D>
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%
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L = size(signal,2); %<25><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еij<D0B5><C4B3><EFBFBD>;
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uw_num = size(uw,2); %<25><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵij<D6B5><C4B3><EFBFBD>;
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sigstmp(1,:) = signal(1,(uw_num+1):end); %<25><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>;
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uwstmp(1,:) = signal(1,1:uw_num); %<25><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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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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