5G - Pre Trial - Physical Signal - BRS                    Home : www.sharetechnote.com

 

 

 

 

 

BRS (Beam Reference Signal)

 

 

 

BRS Full

BRS - Initial 62 data

 

 

Disclaimer : This code is just to push myself (probably readers) to look into the algorithm (formula) specified in the specification to the most detailed level. If you try to convert the specification into the programming code whatever language you choose, you will understand the equation / algorithm in much more detailed level than just reading the document. However, this code has not been verified with any real data.

 

Filename : Generate_Brs.m

Last Update : Dec 24, 2016

%V5G.211 - 6.7.4.1

function SequenceBrs = Generate_Brs(BRS)

 

    NID_Cell = BRS.NID_Cell;

    N_RB_MAX_DL = BRS.N_RB_MAX_DL;

 

    r_m = [];

    

    for l = 0:13

        

        % Generate Psuedo Random Sequence

        ns = floor(1/7);

        lp = mod(l,7);

        C_init = 2^10 * (7*(ns + 1) + lp + 1) * (2 * NID_Cell + 1) + 2 * NID_Cell + 1;

 

        r_m_l = [];

        c_m_even = [];

        c_m_odd = [];

 

        PR.x2_init = C_init;

 

        for m = 0 : (8*(N_RB_MAX_DL-18)-1)

          PR.n = 2*m;

          c_m = Generate_PR(PR);

          c_m_even = [c_m_even c_m];

          PR.n = 2*m+1;

          c_m = Generate_PR(PR);

          c_m_odd = [c_m_odd c_m];

        end;

 

        r_m_l = (1 ./ sqrt(2) * (1 - 2 .* c_m_even)) + (j .* 1 ./ sqrt(2) * (1 - 2 .* c_m_odd));

        

        r_m = [r_m ; r_m_l];

 

    end;

    

    SequenceBrs.r_m = r_m;

    

end

 

 

Filename : PlotSequence_Brs.m

Last Update : Dec 24, 2016

function h=PlotSequence_Brs(BrsSequence,PlotOption)

 

    plotData = BrsSequence.r_m;

    if isfield(PlotOption,'NumOfDataToPlot') == 1

       NumOfDataToPlot = PlotOption.NumOfDataToPlot;

    end;

    

    w = 10;

    

    for l = 0:13

        d_n=plotData(l+1,:);

        

        subplot(14,w,(l*w)+1);

        plot(real(d_n),imag(d_n),'ro', ...

             'MarkerFaceColor',[1 0 0],'MarkerSize',2);

        set(gca,'xticklabel',[]);set(gca,'yticklabel',[]);

        set(gca,'xtick',[]);set(gca,'ytick',[]);

        ylabel(strcat('s = ',num2str(l)));

        set(gca,'fontsize',6);

 

        subplot(14,w,[((l*w)+2) ((l*w)+w)]);

        n = 0:length(d_n)-1;

        plot(n,real(d_n),'r-',n,imag(d_n),'b-');

        if exist('NumOfDataToPlot') == 1

            xlim([0 NumOfDataToPlot]);

        else    

            xlim([0 n(end)]);

        end;    

        set(gca,'xticklabel',[]);set(gca,'yticklabel',[]);

        set(gca,'xtick',[]);set(gca,'ytick',[]);

    end

 

end

 

 

Filename : Test_Generation_Brs.m

Last Update : Dec 24, 2016

 

clear

PlotOption = [];

 

BRS.NID_Cell = 0;

BRS.N_RB_MAX_DL = 100;

 

BrsSequence = Generate_Brs(BRS);

 

%PlotOption.NumOfDataToPlot = 62;

PlotSequence_Brs(BrsSequence,PlotOption);