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19 July 2000 Impact of wideband channel-to-channel mismatch on adaptive arrays
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The wide waveform bandwidths desired for fine range resolution is current and future phased array radars have an impact on the performance of adaptive digital beamforming due to the inevitable frequency response mismatches that occur from channel to channel across the band. In previous work, analytical expressions for the covariance between channels have been developed for a simple two channel array with a sinusoidal ripple in either the amplitude or phase response in one of the channels. This paper extends those results to a more general model that allows larger arrays utilizing time delay steering to be modeled. Expressions are developed for the covariance between channels as a function of the parameters of the channel frequency responses. The performance of the adaptive beamformer is characterized with respect to SINR for waveforms that are flat over the bandwidth and for LFM waveforms processed using stretch processing.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David D. Aalfs, E. Jeff Holder, and John Crawford "Impact of wideband channel-to-channel mismatch on adaptive arrays", Proc. SPIE 4033, Radar Sensor Technology V, (19 July 2000);

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