LFM信号的欠定DOA估计

2012 Second International Conference on Instrumentation, Measurement, Computer, Communication and Control Pub Date : 2012-12-08 DOI:10.1109/IMCCC.2012.209

Zhou-hua Zhu, Lu Shun-jun, Zhang Er-yang, L. Yaomin

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引用次数: 2

摘要

提出了一种基于欠确定假设的LFM信号分离方法。其中传感器较少，则信号被分离。由于LFM信号属于非平稳信号，该方法基于时频分布(TFD)分析。通过抑制TFD的交叉项，使自项变得突出。提出了一种利用自动项点的旋转方法，通过该方法对每个LFM信号的TFD区域进行分类。利用自动项点对应的STFD矩阵，可以单独估计每个LFM信号的到达方向(DOA)。通过仿真验证了该方法的有效性。

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Underdetermined DOA Estimation of LFM Signals

A method is proposed to separate received LFM signals on underdetermined hypothesis. In which the sensors is less then the signals to be separated. As LFM signal belongs to nonstationary signal, the proposed method is based on Time Frequency Distribution (TFD) analysis. Through suppressing the cross term of the TFD, auto term become prominent. A rotation way utilizing the auto term points is presented, by which the TFD area of each LFM signal is classified. Using the STFD matrices corresponding to the auto term points, the Direction Of Arrival (DOA) of each LFM signal can be estimated individually. Through simulation, it is proved that the proposed method is effective.

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来源期刊

2012 Second International Conference on Instrumentation, Measurement, Computer, Communication and Control

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