资源简介
K-best球形译码，最近正在做的一个项目，希望大家多多指导
代码片段和文件信息
Const_size=4; %% QAM_size = Const_size^2;
Constellation = [-（Const_size-1）:2:Const_size-1];
snr_db=[10:3:25];
Nr =4; Nt=Nr; sigma=0.41;
err_num=[0 0 0 0];
MaxIter=1000;K_size=16;
for Iter=1:MaxIter
H=generate_channel（NrNt）;
[QR]=qr（H）;
noise = randn（Nr*21）*sigma;
x=Constellation（unidrnd（Const_size2*Nt1））‘;
rx = H*x + noise;
n1 = Q‘*noise;
r1 = R*x+n1;
%%%%%%%%%%%% K Best algorithm %%%%%%%%%%%%%
[x_est1metric1]=K_best（RConstellationr1K_size）;
x_hat = x_est1（:1）;
err_num（1）= err_num（1）+sum（x_hat~=x）;
%%%%%%%%%%%% Double K Best algorithm %%%%%%%%%%%%%
[x_est1metric21]=K_best（R（Nt+1:2*NtNt+1:2*Nt）Constellationr1（Nr+1:2*Nr）K_size）;
[Q2R2]=qr（H（:[Nt+1:2*Nt 1:Nt]））;
r2=Q2‘*rx;
[x_est2metric22]=K_best（R2（Nt+1:2*NtNt+1:2*Nt）Constellationr2（Nr+1:2*
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