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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 374342, 8 pages
http://dx.doi.org/10.1155/2013/374342
Research Article

Low-Grazing Angle Detection in Compound-Gaussian Clutter with Hybrid MIMO Radar

College Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China

Received 15 April 2013; Revised 12 September 2013; Accepted 17 September 2013

Academic Editor: Hang Hu

Copyright © 2013 Jincan Ding et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper focuses on the target detection in low-grazing angle using a hybrid multiple-input multiple-output (MIMO) radar systems in compound-Gaussian clutter, where the multipath effects are very abundant. The performance of detection can be improved via utilizing the multipath echoes. First, the reflection coefficient considering the curved earth effect is derived. Then, the general signal model for MIMO radar is introduced in low-grazing angle; also, the generalized likelihood test (GLRT) and generalized likelihood ratio test-linear quadratic (GLRT-LQ) are derived with known covariance matrix. Via the numerical examples, it is shown that the derived GLRT-LQ detector outperforms the GLRT detector in low-grazing angle, and both performances can be enhanced markedly when the multipath effects are considered.