nti_tr_uwb_2.m

这是一个较为完整的tr方式uwb接收机的M文件

%-----------------------------------------------------------------------
%-----------------------------------------------------------------------
%-----------------------------------------------------------------------
load tx;
ber=[];
for ii = 1:1
    snr = 20;
    ii    
    rx = awgn(tx,snr);
    rx = reshape(rx,nTs,data_length);
    
    %-----------------------------------------------------------------------
    %basic settings
    sample_time = 1e-10;
    Ns = 6; %Ts/Tf
    nTp = 10;
    nTd = 50;
    nTf = 120;
    nTs = Ns*nTf;
     
    data_length = 100000;
    
    %----------------------------------------------------------------------
    for s=1:1   
        nTi = 7+3*s;

        %-----------------------------------------------------------------------
        %small trick
        reference_index_select = [];
        for i=1:Ns
            reference_index_select = [reference_index_select,(i-1)*nTf+1:(i-1)*nTf+nTi];
        end

        data_index_select = [];
        for i=1:Ns
            data_index_select = [data_index_select,(i-1)*nTf+nTp+nTd+1:(i-1)*nTf+nTp+nTd+nTi];
        end

        %-----------------------------------------------------------------------
        %seperate reference and data pulse
        rx_reference = rx(reference_index_select,:);
        rx_data = rx(data_index_select,:);

        %-----------------------------------------------------------------------
        %demodulation
        de = rx_reference.*rx_data;
        de = sum(de,1);
        de = de>0;
        source = source>0;
        ber(s,ii) = (data_length - sum(de==source))/(data_length);
    end
end
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