GLRT-based Detection Algorithm for Polarimetric MIMO Radar Against SIRV Clutter |
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Authors: | Guolong Cui Lingjiang Kong Xiaobo Yang |
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Affiliation: | 1. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu City, China
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Abstract: | This paper mainly deals with target detecting problem using polarimetric Multiple Input Multiple Output (MIMO) radar against
Spherically Invariant Random Vector (SIRV) clutter. First, we develop the MIMO signal model to two polarimetric channels and
SIRV clutter-dominated scenario, and then the Generalized Likelihood Ratio Test (GLRT) is derived with known covariance structure.
Meanwhile, three estimation strategies of covariance, such that Sampled Covariance Matrix (SCM), Normalized Sampled Covariance
Matrix (NSCM) and Fixed Point Estimation (FPE) matrix, are introduced to make derived receiver fully adaptive. A thorough
performance assessment is given by several numerical examples, and the results show that the polarimetric diversity and the
spatial diversity can be exploited to improve the detection performance, and it outperforms the conventional polarimetric
phased-array counterpart. Meanwhile, the FPE strategy is more suitable to implement the adaptive detection algorithm, the
adaptive loss of which is completely acceptable in practical applications. |
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Keywords: | |
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