steering_f.m

目标定位和跟踪的源程序

%% ULA array steering vector;
%% introduce the unkown parameter fk(frequency);
%% 2005-8-27; Madengyong

%% parameters: 
   %% fk: the absolute frequency of each point in frequency domain;
   %% r_a: the range of array aperture;
   %% vs: the propagation velocity of sound signal; 
   %% L: the number of array elements;
   %% sita : the azimuth angle;
   
function D=steering_f(fk,r_a,vs,L,sita)

  sita=sita*pi/180;

  D=exp(-j*2*pi*fk*r_a*[0:L-1].'*sin(sita)./vs);
  
end