Maximum Likelihood Angular Resolution of Multiple Sources

normal. If dn denotes the distance of the n The maximum likelihood technique is developed for estimating the directions Of multiple, ClOSelYspaced signal sources from data obtained at the elements of an array. The technique makes use of a certain matrix decomposition which results in some computational simp1 ification. Statistical written as test criteria, which do not require the determination of subjective thresholds, are also applied to the maximum likelihood technique for estimation of the number of sources. The Performance of the maximum likelihood technique and comparison with an eigenvector decomposition technique and the Minimum-Energy technique is determined by computer Simulation. element from some arbitrary first element (origin) and ak(i) denotes the complex amplitude of the ith signal at the origin at time instant tky the observations at the nth element can be