Adaptive Antenna Systems
Abstract:
The basic principles of adaptive antenna systems are reviewed. Special attention is given to the sidelobe canceller--the prototype and classic example of adaptive antenna systems. The operation of the sidelobe canceller is interpreted in terms of noise cancelling and adaptive null steering. The classical theory of adaptive elements is developed. Tapped-delay-line and frequency-domain array-processing filters are discussed. The signal-to-noise ratio and the mean-square-error performance criteria are distinguished. The general theory of adaptive noise cancelling is linked to the sidelobe canceller, the classical theory of adaptive elements, and the adaptive notch filter. An adaptive antenna system is derived from the constrained minimum power criterion, which limits the cancellation of the desired signal. Author