shiftzero.m

rang doppler imaging and motion compensation中的源代码

function [centerdata,index] = shiftzero(data,freq)
%	
%	This function moves the radar image to the center of
%	the imaging window.
%
%	data: Radar signature from the target.
%	freq: transmitted radar signature.
%

   [m,n]=size(freq);
   if m == 1
      m = n;
      n = 1;
      freq = freq(:);
   end
   
   [m,n] = size(data); 
   hm=m/2;
   index = (freq(hm)+freq(hm+1))/2;     
   
   modfreq = tranfreqm(m,n);
   mulfreq = exp(-j*index*modfreq); 
   centerdata = data.*mulfreq;