argminmmse.m

对Vblast—oFdm系统地仿真

function [k, postSNR] = argminmmse(G,H,sigma2,krest)
kno=length(krest);
Gnorm=zeros(2,kno);
% H
% G
GH2=abs(G*H).^2;
G2=abs(G).^2;
GH2norm=sum(GH2,2);
G2norm=sum(G2,2);
for ii=1:kno
    jj=krest(ii);
    if G2norm(jj)~=0
        Gnorm(:,ii)=[jj;GH2(jj,jj)/(sigma2*G2norm(jj)+GH2norm(jj)-GH2(jj,jj))];
    else
        Gnorm(:,ii)=[jj;-inf];
    end
end
% Gnorm
[minnorm, mincol]=min(Gnorm(2,:));
k=Gnorm(1,mincol);
postSNR=minnorm;