form_q_symm.m

实现mimo预编码环境中容量的所有计算,包括不同的准则

function [Q_new] = form_Q_symm(x_new, N, Nr, Nx, ind3)
%------------------------------------------------------------
% Function to reorganize a vector into a covariance matrix
%
% Author: Mai Vu
% Date: 11/30/2003
% Revised: 04/12/2004
%------------------------------------------------------------
   
  x_all = [2*x_new(1:N); x_new(N+1:Nr) + j*x_new(Nr+1:Nx); x_new(N+1:Nr) - ...
           j*x_new(Nr+1:Nx)];
  Q_new = reshape(x_all(ind3),N,N);