Progress in Near-field Source Localization via Uniform Circular Array
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摘要: 近场源定位在雷达、声呐和通信中发挥着重要的作用。该文利用均匀圆阵的阵列结构优势，系统梳理了窄带近场源定位方法以及解模糊方法，并在此基础上从时域、频域、分数阶傅里叶域等方面阐述了近场线性调频(LFM)信号的方位角、俯仰角和距离等3维位置参数快速精确估计方法。最后，对相干辐射源和近远场混合源参数估计等后续研究内容进行了展望。Abstract: Near-field source localization plays an important role in the radar, sonar and communications. The near-field source localization methods and the resolving ambiguity methods via uniform circular array are systematically introduced in this paper. On this basis, the fast and accurate algorithms for three-dimensional position parameter (azimuth angle, elevation angle and range) estimation of near-field Linear Frequency Modulated (LFM) signal are further introduced from time domain, frequency domain, and fractional Fourier domain. Finally, the following research ideas are proposed from the aspects of coherent source and mixed source localization.
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表 1 单次运行平均时间对比(s)
基于均匀圆阵的近场LFM信号定位算法 时间 基于聚焦变换的算法 2.98e-02 基于分数阶傅里叶变换的算法 2.74 基于时延的算法 2.02e-02 ISSM-3DMUSIC算法 29.38 
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