Patent ID: 8022874

Claim:
A method for determining a respective electromagnetic parameter and spatial disposition of one or more signal sources in a surveillance space simultaneously bombarded by multiple signals, the method comprising: receiving said multiple signals at each of a plurality of widebeam, wideband antennas that are spaced apart in a linear array by equal mutual spacings; simultaneously sampling the respective signals S i,n of each of the antennas at a sampling rate to generate a two-dimensional array of sampled values S i,n , where S i,n is the n-th sample of the signal received at an antenna i; calculating a two-dimensional Fourier transform F jk of the array S i,n ; and identifying peaks in the Fourier transform satisfying one or more predetermined criteria, a peak satisfying the predetermined criteria being indicative of a signal source in the surveillance space, whereby the location of the peak in said two-dimensional Fourier transform F jk indicates the frequency and the azimuth of the respective signal source and the amplitude of the peak indicates the amplitude of the signal source.