|Nicholas B. Pulsone and Edward J. Baranoski
MIT Lincoln Laboratory
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Abstract Adaptive array processing techniques are useful for rejecting coherent interference in applications such as radar, sonar, and communications. However, the performance of these techniques degrades with increasing bandwidth of the interference. Two methods for improving the bandwidth performance of an adaptive array processor include tapped delay-line processing and Discrete Fourier Transform (DFT) subband processing. This work analyzes the bandwidth performance of these methods for a beamspace application constrained to a limited number of beams. We relate the performance of these methods to the bandwidth, power, and bearing of the interference as well as to the antenna patterns of the beamspace application. Performance results are illustrated using both simulations and measurements made with AN/SPY-1.
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