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Proceedings Paper

Impact of wideband channel-to-channel mismatch on adaptive arrays
Author(s): David D. Aalfs; E. Jeff Holder; John Crawford
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Paper 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.

Paper Details

Date Published: 19 July 2000
PDF: 8 pages
Proc. SPIE 4033, Radar Sensor Technology V, (19 July 2000); doi: 10.1117/12.391843
Show Author Affiliations
David D. Aalfs, Georgia Tech Research Institute (United States)
E. Jeff Holder, Georgia Tech Research Institute (United States)
John Crawford, National Missile Defense Program Office (United States)

Published in SPIE Proceedings Vol. 4033:
Radar Sensor Technology V
Robert Trebits; James L. Kurtz, Editor(s)

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