资源简介
针对初学者的球形解码仿真,有部分不完善的地方,请多多指教
代码片段和文件信息
function xHat=auto_SD(yHm)
%apt to 4-by-4 complex channel matrix H;
% for integer min square problems;
% y denotes the receive signals‘ vectors;
%H dentes the channel matrix which constrains to idd Gaussian distribution;
%m denotes transmit antennas‘ number as well as that of recieve‘s
% xHat denotes the output signals‘ vectors;
% the function isfirst developed by Karen SU.then revised and modified by
% YU Wang from DUTadapted to 16 QAM with alphabet[-3-1+1+3].
global w;
global z;
global cn;
global zp;
global alphabet;
%initial procedure
xHat=[ ];
wHat=inf;
m=2*m;
y = [real(y);imag(y)];
H = [[real(H)-imag(H)];[imag(H)real(H)]];
alphabet=[-3-113];
[HqHr] = qr(H);
wRoot = 0;
yR = Hq‘*y;
%main tracing back procedure
w=zeros(1m+1);
py=zeros(mm);
z=zeros(1m);
dim=m;
cn=zeros(1m);
zp=zeros(1m);
lb=ones(18);
ub=4*ones(18);
%lb&ub denotes the min & max limit of alphabet respectively;
dimp=dim+1;
w(dimp)=wRoot;
% the algrithom searches nodes by deep-first;
% Compute first child of root node
py(1:dimdim)=yR;
%.........调用首孩子比较节点函数!!!!function
compFirstChild(dimdimplb(dim)ub(dim)Hr(dimdim)py(dimdim));
backtrack=0;
while dim<=m
if w(dim) if dim==1
wHat=w(dim);
xHat=z;
backtrack=1;
dim=dimp;
dimp=dimp+1;
if cn(dim)<=ub(dim)-lb(dim)
backtrack=0;
%%调用比较兄弟节点的函数!!!!function
compNextSibling(dimdimplb(dim)ub(dim)Hr(dimdim)py(dimdim));
end
elseif backtrack&&cn(dim)>ub(dim)-lb(dim)
dim=dimp;
if dim<=m
dimp=dimp+1;
if cn(dim)<=ub(dim)-lb(dim)
backtrack=0;
%%调用比较兄弟节点的函数!!!function
compNextSibling(dimdimplb(dim)ub(dim)Hr(dimdim)py(dimdim));
end
end
else
dimp=dim;
dim=dim-1;
py(1:dimdim)=py(1:dimdimp)-Hr(1:dimdimp)*z(dimp);
%% 调用比较首孩子节点的函数!!!function
compFirstChild(dimdimplb(dim)ub(dim)Hr(dimdim)py(dimdim));
end
else
dim=dimp;
backtrack=1;
if dim<=m
dimp=dimp+1;
if cn(dim)<=ub(dim)-lb(dim)
backtrack=0;
%%调用比较兄弟节点的函数!!!function
compNextSibling(dimdimplb(dim)ub(dim)Hr(dimdim)py(dimdim));
end
end
end
end
m1=m/2;
xHat=xHat(1:m1)+i*xHat(m1+1:2*m1);
% internal recall functiom :1.compFirstChild();2.compNextSibling().
function compFirstChild(dimdimplbdubdHrddpydd)
global w;
global z;
global cn;
global zp;
global alphabet;
z0=pydd/Hrdd;
z1=decasd(z0);
z1=min([z1alphabet(ubd)]);
z1=max([z1alphabet(lbd)]
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 4295 2010-06-18 21:52 SD\auto_SD.m
文件 1062 2010-05-04 20:39 SD\jakes.m
文件 3720 2014-06-10 14:37 SD\MAIN.m
目录 0 2014-06-10 14:32 SD
----------- --------- ---------- ----- ----
9077 4
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