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

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.

Frequency Diverse Array MIMO Radar Adaptive Beamforming with Range-Dependent Interference Suppression in Target Localization

“…The eigenvalue decomposition (EVD) of an × Hermitian symmetric matrix requires a computation complexity of (4(1/3) 3 ) [28]. According to Section 3, the total computation complexity of an FDA MIMO radar is (5(1/3) 3 3 ), which is the same as that of a traditional MIMO radar. When the transmit and receiving arrays have the same element spacing, the computation complexity will be (5(1/3)( + ) 3 ) [29].…”

“…Multiple-input and multiple-output (MIMO) radar has received much attention in recent years. But for conventional colocated MIMO radar, the array manifold caused by time delay only depends on the angle and thus has difficulty in distinguishing the targets and interferences that have the same angle but different ranges by general beamforming techniques [1][2][3]. Moreover, the localization performance will also be significantly degraded [4,5] with the targets with the same angle but different ranges.…”

Target Detection in Low Grazing Angle With Ofdm Mimo Radar

“…In [19], the authors demonstrated that the detection performance could be significantly improved through multipath utilization with statistical MIMO radar. The detection performances of two kinds of generalized likelihood ratio test (GLRT) detectors with hybrid MIMO radar in low grazing angel were discussed in [20].…”