Impact of wideband channel-to-channel mismatch on adaptive arrays

David D. Aalfs; E. Jeff Holder; John Crawford

doi:10.1117/12.391843

19 July 2000 Impact of wideband channel-to-channel mismatch on adaptive arrays

David D. Aalfs, E. Jeff Holder, John Crawford

Proceedings Volume 4033, Radar Sensor Technology V; (2000) https://doi.org/10.1117/12.391843
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.391843

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