17 June 2011 Combining synthetic aperture radar and space-time adaptive processing using a single receive channel
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Abstract
We propose a single-receive, multiple-transmit channel imaging radar system that limits received data rate while also providing spatial processing for improved detection of moving targets. A multi-input, single-output (MISO) system uses orthogonal waveforms to separate spatial channels at the single receiver. The use of orthogonal waveforms necessitates several modications to both synthetic aperture radar imaging and adaptive space-time beamforming. An orthogonal frequency-division transmit waveform scheme is proposed, and we derive the attendant extensions to the standard backprojection and space-time beamforming algorithms.. We demonstrate imaging and moving target detection results using data from an airborne X-band system. We conclude with a discussion of the clutter covariance matrix of the resulting space-time beamformer and a suggested waveform scheduling scheme to minimize the rank of the observed clutter subspace.
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Christie Bryant, Christie Bryant, Emre Ertin, Emre Ertin, Lee C. Potter, Lee C. Potter, } "Combining synthetic aperture radar and space-time adaptive processing using a single receive channel", Proc. SPIE 8051, Algorithms for Synthetic Aperture Radar Imagery XVIII, 80510G (17 June 2011); doi: 10.1117/12.888953; https://doi.org/10.1117/12.888953
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