| 一种新的椭圆球面波信号时频域滤波方法 |
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| 引用本文： | 王媛媛,毛忠阳,陆发平.一种新的椭圆球面波信号时频域滤波方法[J].海军航空工程学院学报,2023,38(2):173-178. |
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| 作者姓名： | 王媛媛 毛忠阳 陆发平 |
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| 作者单位： | 91001部队,北京 100841;海军航空大学,山东烟台 264001;91206部队,山东青岛 266109 |
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| 摘 要： | 针对如何在时频域降低干扰噪声对椭圆球面波函数(Prolate Spheroidal Wave Functions,PSWFs)信号时频域分布特性的影响,引入精细滤波,提出了 1种新的椭圆球面波信号时频域滤波方法。仿真结果表明,所提方法在时频域以能量峰值点为基准,构造以距离为依据的滤波算子调节参数,能够有效抑制噪声对 PSWFs信号时频域分布特 性的影响,提高信号局部区域的能量聚集性。
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| 关 键 词： | 椭圆球面波 时频分布特性 时频域滤波 精细滤波 |
A Novel Time-Frequency Filter Method for Prolate Spheroidal Wave Function Signal |
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| WANG Yuanyuan,MAO Zhongyang,LU Faping.A Novel Time-Frequency Filter Method for Prolate Spheroidal Wave Function Signal[J].Journal of Naval Aeronautical Engineering Institute,2023,38(2):173-178. |
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| Authors: | WANG Yuanyuan MAO Zhongyang LU Faping |
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| Institution: | The 91001st Unit of PLA, Beijing 100841, China;Naval Aviation University, Yantai Shandong 264001, China; The 91206th Unit of PLA, Qingdao Shandong 266109, China |
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| Abstract: | Aiming at how to reduce the influence of interference noise on the time-frequency distribution characteristics of prolate spheroidal wave functions(PSWFs) signals in the time-frequency domain, a new time-frequency domain filtering forthe PSWFs signal is proposed by introducing fine filtering. Simulation analysis show that the proposed method takes the en.ergy peak point as the reference in the time-frequency domain and constructs the filter operator adjustment parametersbased on the distance, which can effectively suppress the influence of noise on the time-frequency distribution characteris.tics of the PSWFs signal, at the same time, can improve the energy aggregation degree of the signal locally. |
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| Keywords: | Prolate Spheroidal Wave Functions time-frequency characteristics time-frequency filtering fine filtering |
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