DIRECTION FINDING OF SOURCES OF RANDOM AND UNKNOWN SIGNALS.

The method of maximum likelihood is used to synthesize algorithms for estimation of the angular coordinate, and also of the spectral intensity and related parameters, for different cases of a priori information on the signal: an unknown deterministic signal with a known frequency bandwidth, a random signal and an unknown signal with an unknown bandwidth. The accuracy of estimation of the angular coordinate and of the spectral intensity is determined. Three possible versions of the received signal processing are given for measurement of information-carrying parameters. These allow one to realize the estimation algorithms in both analog and digital form.