NDLI: Multi-mode propagation mode localisation and spread-Doppler clutter suppression method for multiple-input multiple-output over-the-horizon radar

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Multi-mode propagation mode localisation and spread-Doppler clutter suppression method for multiple-input multiple-output over-the-horizon radar

Content Provider	IET Digital Library
Author	Yu, Wenqi Chen, Jianwen Bao, Zheng
Abstract	Multi-mode spread-Doppler clutter (SDC), caused by a stratified ionosphere, affects the detection performance of over-the-horizon radar on slow ships. To improve a multiple-input multiple-output over-the-horizon radar (MIMO-OTHR) system's performance and to mitigate the lingering effect of SDC, a novel multi-mode SDC suppression method based on full-mode spatial separation is proposed here. Furthermore, authors’ method can estimate the elevation angle of direction of departure (DOD) and direction of arrival (DOA), contributing to mode localisation. By applying the bi-orthogonality of matrices, the cost function of single-mode component analysis is constructed under a least square criterion. By iteratively solving for the cost function, and by applying a systematic multistage decomposition, the elevation DOD and DOA and the slow-time Doppler information of each mode are obtained sequentially. Compared with classical SOBI and SS-SOBI methods, the proposed method improves the output signal-to-clutter-plus-noise ratio for spatial filtering. The estimated DOD and DOA do not need to be paired, reducing the angle error inherent in the SR method while performing the transmit-receive cascade refinement searching step. Simulation results demonstrate the excellent performance of the proposed method, which is beneficial to improve the ability of MIMO-OTHR to detect slow ships and determine the propagation mode.
Starting Page	1214
Ending Page	1224
Page Count	11
ISSN	17518784
Volume Number	13
e-ISSN	17518792
Issue Number	Issue 8, Aug (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2018.5479
Journal	IET Radar, Sonar & Navigation
Publisher Date	2019-03-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Angle Error Reduction Blind Source Separation Cost Function Detection Performance Direction of Arrival Estimation Direction of Departure Estimation DOA Estimation DOD Estimation Doppler Radar Elevation Angle Estimated DOD Filtering Method in Signal Processing Full-mode Spatial Separation Interpolation And Function Approximation Ionospheric Electromagnetic Wave Propagation Least Square Criterion Least Squares Approximation Linear Algebra Lingering Effect Mitigation Matrix Algebra Matrix Bi-orthogonality MIMO Radar MIMO-OTHR Mode Localisation Multimode Propagation Mode Localisation Multimode Spread-Doppler Clutter Multiple-input Multiple-output Over-the-horizon Radar System Performance Novel Multimode SDC Suppression Method Numerical Analysis Output Signal-to-clutter-plus-noise Ratio Propagation Mode Radar Clutter Radar Detection Radar Equipment Radar Signal Processing Signal Detection Single-mode Component Analysis Slow Ship Detection Slow-time Doppler Information Spatial Filter Spatial Filtering Spread-Doppler Clutter Suppression Method SR Method SS-SOBI Method Statistical Analysis Statistics Stratified Ionosphere System And Application Systematic Multistage Decomposition Transmit-receive Cascade Refinement Searching Step
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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