DOA估计MATLAB代码

Smart Antennas for Wireless Applications；This code creates Figure 7.3, plot of a Capon (ML)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%                                                         %%
%% ******************************************************  %%
%% * Smart Antennas for Wireless Applications w/ Matlab *  %%
%% ******************************************************  %%
%%                                                         %%
%% Chapter 7: Ex 7.6                                       %%
%%                                                         %%
%% Author: Frank Gross                                     %%
%% McGraw-Hill 2005                                       %%
%% Date:  1/26/2004                                        %%
%%                                                         %%
%% This code creates Figure 7.3 plot of a Capon （ML）      %%
%%     Pseudospectrum for theta1= -5 & theta2 = 5          %% 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%      

%%------------------- Define Variables:--------------------%%
% M - # of elements in array                                %
% sig2 - noise variance                                     %
% th1 th2 - angles of arrival                              %
% a1 a2 a - array steering vectors