function [CIR_mean_multicast] = CIR_mean_for_multicast(CIR)

[m,n]=size(CIR);

CIR_mean_multicast(1,:)=CIR(1,:);

for i=2:m
    for j=1:45000
        CIR_mean_multicast(i,j)=mean(CIR(1:user,j));
    end
end