Study on Pattern Distortion and DOA Estimation Performance of Crossed-Loop/Monopole Antenna in HF Radar

“…Circular array is one of the most common arrays in the radar reconnaissance system [29,30]. The measurements from the electric dipole circular array and magnetic dipole circular array are available separately in practice [31][32][33]. In recent years, there are many research results of polarisation sensitive array, which provide strong technical support for engineering application.…”

Section: Data Modelmentioning

confidence: 99%

Joint estimation of DOA and polarisation for radar signals based on dual‐polarised antenna array

Zhu

He³

et al. 2020

IET Microwaves, Antennas & Propagation

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To apply polarisation information of radar signal in radar reconnaissance equipment, a joint estimation algorithm of the radar signal direction of arrival (DOA) and polarisation parameters based on dual‐polarisation antenna array has been researched in this study. The mathematical model of dual‐polarised circular array has been given, and the joint estimation method of DOA and polarisation parameters for radar signal based on multiple signal classification (MUSIC) algorithm has been analysed. To overcome the shortcomings such as high calculation cost for the MUSIC algorithm, the DOA‐matrix algorithm has been presented. DOA‐matrix algorithm can effectively distinguish the radar signals with different polarisation states in the same direction by use of eigen‐decomposition of the DOA‐matrix. Through matrix correlation calculation, spectral peak search has been avoided, and the computational cost and algorithm complexity are greatly reduced. Finally, the feasibility of the DOA‐matrix algorithm has been simulated and analysed. The simulation results show that the DOA‐matrix algorithm can effectively complete the joint estimation of DOA and polarisation parameters for radar signal. The running time reaches millisecond level, which has a strong application value in engineering.

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“…For an idealized CLM antenna, the MUSIC error variance has been deduced by [20] and can be expressed as…”

Section: Music Algorithm and Estimation Errormentioning

confidence: 99%

DOA Estimation Performance Analysis and Verification of Dual Crossed-Loop/Monopole Antenna Array

Wang

Wen

Tian

2019

International Journal of Antennas and Propagation

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The compact high-frequency surface wave radar using a crossed-loop/monopole (CLM) antenna as the receiving sensor has been widely used in ocean remote sensing and target monitoring. However, the direction of arrival (DOA) estimation accuracy of a single CLM antenna is the dominant factor that restricts the target monitoring performance of the compact HF radar. Besides, the single CLM antenna can estimate two signals simultaneously at most, but its effectiveness is challenged by the pattern distortion and the existence of coherent sources, which limits the application range of the compact HF radar. In this study, a compact array combining two CLM antennas is proposed to improve the DOA estimation accuracy and solve the multisource DOA estimation problem. The estimation error and multisource DOA estimation performance of a dual CLM antenna array are analyzed by formula derivation and simulation. Furthermore, the field experiment results are given to demonstrate the performance improvement of the dual CLM antenna array.

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Study on Pattern Distortion and DOA Estimation Performance of Crossed-Loop/Monopole Antenna in HF Radar

Cited by 29 publications

References 23 publications

Fully digital multi‐frequency compact high‐frequency radar system for sea surface remote sensing

Fully digital multi‐frequency compact high‐frequency radar system for sea surface remote sensing

Joint estimation of DOA and polarisation for radar signals based on dual‐polarised antenna array

DOA Estimation Performance Analysis and Verification of Dual Crossed-Loop/Monopole Antenna Array

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