2004 IEEE Radar Conference

Innovative Radar Technologies - Expanding System Capabilities

 April 26-29, 2004 Wyndham Philadelphia at Franklin Plaza Philadelphia, Pennsylvania
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Session 2.4
Adaptive beam-domain processing for space-based radar

Braham Himed - Air Force Research Laboratory

Tue, 27 April 2004, 10:20 AM - 12:00 PM


This paper discusses beam-domain space-time adaptive processing (STAP) algorithms for a low-earth-orbit (LEO) space-baced radar (SBR). The performance of subarray-based joint-domain-localized (JDL) algorithm is first examined for various processor parameters. Then, a combined beam-domain STAP algorithm approach that combines JDL with difference ( beams is presented. It is shown that the combined JDL- algorithms offer less system complexity and yield performance similar to that of JDL that uses higher degrees of freedom. It is also shown that the earth?s rotation induces a crab angle to the platform, which makes the clutter range-Doppler spectrum vary with range. Illustrative examples show that this crab angle severely degrades the signal-to-interference-plus-noise ratio (SINR), thereby reducing the minimum detectable velocity (MDV) of STAP systems.

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