A Switched-Element System Based Direction of Arrival (DOA) Estimation Method for Un-Cooperative Wideband Orthogonal Frequency Division Multi Linear Frequency Modulation (OFDM-LFM) Radar Signals

A Switched-Element System Based Direction of Arrival (DOA) Estimation Method for Un-Cooperative Wideband Orthogonal Frequency Division Multi Linear Frequency Modulation (OFDM-LFM) Radar Signals
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基于开关元件系统的非协作宽带正交频分多线性调频 (OFDM-LFM) 雷达信号到达方向 (DOA) 估计方法

DOI:
10.3390/s19010132
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发表时间:
2019-01
期刊:
影响因子:
3.9
通讯作者:
Tang Bin
Tang Bin
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Liu Yifei;Zhao Yuan;Zhu Jun;Wang Jun;Tang Bin

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本文提出了一种基于开关元件测向(SEDF)系统的非协作宽带正交频分多线性调频(OFDM-LFM)雷达信号到达方向(DOA)估计方法。该方法旨在改善大多数DOA算法占用大量信道和计算资源来处理宽带信号测向的问题。然后,通过导出SEDF系统截获的OFDM-LFM信号的解析导向矢量,设计了迭代空间参数估计器,可以显着减轻高线性调频速率引起的色散效应。最后,给出了算法流程和数值模拟,以验证我们提出的DOA方法的可行性和有效性。
This paper proposes a switched-element direction finding (SEDF) system based Direction of Arrival (DOA) estimation method for un-cooperative wideband Orthogonal Frequency Division Multi Linear Frequency Modulation (OFDM-LFM) radar signals. This method is designed to improve the problem that most DOA algorithms occupy numbers of channel and computational resources to handle the direction finding for wideband signals. Then, an iterative spatial parameter estimator is designed through deriving the analytical steering vector of the intercepted OFDM-LFM signal by the SEDF system, which can remarkably mitigate the dispersion effect that is caused by high chirp rate. Finally, the algorithm flow and numerical simulations are given to corroborate the feasibility and validity of our proposed DOA method.
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