MAXIMUM-LIKELIHOOD RECEIVER FOR LOW-ANGLE TRACKING RADAR. PART 2: ; THE NONSYMMETRIC CASE.

An asymmetric maximum-likelihood receiver (based on the Gram-Schmidt orthonormalization procedure) is described for handling the low-angle tracking-radar problem where the direct and specular multipath components of the received signal impinge on the array antenna from arbitrary directions. By means of a simple test based on Fisher's F-statistic, one is able to determine the most likely number of waves incident on the array. The processor is …