Three basic problems that arise in signal resolution are examined: what i is the shortest angular distance between signal sources that can be resolved by a discrete array; what is the largest number of resolvable signal sources of unknown power, and what is the nature of optimum processing to resolve signal sources of unknown power that are close to one another? The results cited indicate that the resolution of an antenna array can exceed the Rayleigh limit and Is determined by the output signal/noise ratio, while the number of signals that can be resolved depends on the number of different spatial frequencies in the aperture; of the array. It is shown that in the Gaussian approximation, the optimum - processing algorithm for resolution reduces to weighted processing of estimates of the cross-correlation moments for signals from all elements of the array and makes it possible to ensure resolution near i the potential limit.
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