2-D Direction of Arrival Estimation Method Using Radon-Wigner Transform
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摘要: 针对宽带多线性调频信号2维波达方向(2-D DOA)估计精度低的问题，该文提出了一种基于Radon-Wigner变换(RWT)的2-D DOA估计方法。该方法利用RWT在多目标环境下能够有效抑制交叉项干扰和噪声，具有很好的时频汇聚性特点，通过峰值搜索确定目标个数并重构信号阵列，最后利用MUSIC空间谱分析方法实现了对多个LFM信号的2-D DOA估计。仿真实验表明，基于RWT的DOA估计方法能对非平稳信号进行有效的2-D DOA估计。
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关键词:
- 信号处理 /
- 线性调频信号 /
- 2维波达方向估计 /
- Radon-Wigner变换(RWT)
Abstract: According to the problem of two-dimension (2-D) Direction Of Arrival (DOA) estimation accuracy low for wideband Linear Frequency Modulation (LFM) signals, a method of 2-D DOA estimation based on Radon-Wigner Transform (RWT) is proposed. In this method, by using the excellent time-frequency concentration performance of RWT which can eliminate cross interference terms and noise effectively in the background of multiple sources firstly, the number of target is determined by peak researching, and the array signal is reconstructed. Finally the MUSIC spatial spectrum analysis algorithm is used to estimate the 2-D DOA of multiple LFM signals. The simulation results show that the method based on RWT can efficiently estimate 2-D DOA for non-stationary signals. 期刊类型引用(5)
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