Phase-Only Space-Time Adaptive Processing
نویسندگان
چکیده
Space-time adaptive processing (STAP) is a well-known and effective method to detect targets, obscured by interference, from airborne radars that works coherently combining signals phased antenna array (spatial domain) with multiple radar pulses (temporal domain). As widely demonstrated, optimum STAP, in the sense of maximizing output signal interference plus noise ratio (SINR), coherent, linear, transversal filter (i.e., tapped delay line), can be synthesized complex-valued weight vector. This paper extends previous work focused on spatial-only nulling, derives phase-only STAP; namely, optimal vector maximizes SINR subject constraint it belongs N-torus complex vectors, where N number spatio-temporal degrees freedom. Because this problem does not admit closed-form solution, solved numerically using conjugate gradient (CGM). The effectiveness STAP demonstrated both values receiving beampattern shape, comparing fully-adapted nonadapted beam former responses as well other possible counterparts. Additionally, several analyses practical utility also demonstrate benefits provided STAP.
منابع مشابه
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ژورنال
عنوان ژورنال: IEEE Access
سال: 2021
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2021.3122837