Patent ID: 8274432

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 antennas that are spaced apart in a linear array by predefined spacings; simultaneously sampling the respective signals of each of the antennas at a predetermined 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 of sampled values S i,n ; and identifying peaks in the Fourier transform satisfying one or more predetermined criteria, wherein an identified peak satisfying the predetermined criteria is indicative of a signal source in the surveillance space, and wherein a location of the peak in the Fourier transform F jk indicates a frequency and an azimuth of the respective signal source and an amplitude of the peak indicates an amplitude of the signal source; and for the identified peak, calculating the frequency of the respective signal source using an algebraic involving the predetermined sampling rate.