multirece.m

In 揚erformance of multi-carrier DS CDMA Systems?we apply a multi-carrier signaling technique to a di

function [z]= multirece(rec,h,t,Nsample,Nc,pn,M,fc,Nusers) 
% ----------------------------------------------------------------------- %
Nf = 31; 
alpha = 0.5; 
T = 1; 
Tc = (T/Nc); 
Fs = Nsample/Tc;
%Multiplying multicarrier M 
for a = 1:Nusers
    for b = 1:M, 
        demod(b,:) = sqrt(2)*rec(a,:).*cos(2*pi*fc(b)*t); 
        [ht] = Fil_ter(Nf,Tc,alpha,Fs,0); 
        aa = conv(demod(b,:),ht);
        filter_output(b,:) = aa(1+(Nf-1)/2:length(aa)-(Nf-1)/2);
        %sampling
        for k = 1:Nc,
            rec1(b,k) = filter_output(b,((k-1)*Nsample+1));
        end; 
        %despread
        temp(b) = conj(h(b))*sum(rec1(b,:).*pn(1,:)); 
    end; 
    y(a) = sum(real(temp)); 
end
z = y; %Decision
% ----------------------------------------------------------------------- %