Utilizing Waveform Features for Adaptive Beamforming and Direction Finding with Narrowband Signals

■ Extensive research has been done on the use of antenna arrays for direction finding and beamforming; this research focuses on the detailed behavior of specific techniques rather than on actual signal processing applications. In most applications, there is a fundamental signal feature that provides essential leverage for an effective processing approach. This article, which is structured around such features, presents a comprehensive framework for selecting an appropriate adaptive approach for processing cochannel narrowband signals. We address the roles of antenna calibration and prior waveform knowledge, and give examples of effective, practical direction-finding and beamforming procedures that cover a wide range of potential applications.

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