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2. 发明公开

EP3227703A1 METHODS AND SYSTEMS FOR SPECTRAL ANALYSIS OF SONAR DATA 有权
标题翻译：用于声波数据谱分析的方法和系统
公开(公告)号：EP3227703A1
公开(公告)日：2017-10-11
申请号：EP14821885.2
申请日：2014-12-02
申请人： Thales Solutions Asia Pte Ltd. , Nanyang Technological University
发明人： LIM, Hock-Siong , NG, Boon Poh , REDDY, Vinod Veera
IPC分类号： G01S3/80 , G01S15/42 , G01S15/58
CPC分类号： G01S3/8006 , G01S15/42 , G01S15/58
摘要： Methods and systems are presented for spectral analysis of data generated by one or more sonar sensors. A covariance matrix of the captured sound is derived, denoted by an LxL matrix R, and for each power value which is to be calculated for each direction, a set w of L weights are derived which minimize w H Rw subject to a constraint which is itself a function of a covariance matrix of sound captured by the sensors or based on a theoretical noise model. The set of weights w is used to produce a power spectrum at a particular time instant. Embodiments of the invention can be used to compute two types of spectrum: (i) a spatial spectrum and (ii) a frequency spectrum (or, by extension, a Doppler spectrum). That is, it may be performed in either the spatial or the frequency domain.
摘要翻译：提供了用于由一个或多个声纳传感器生成的数据的频谱分析的方法和系统。导出捕获的声音的协方差矩阵，用L×L矩阵R表示，并且对于要针对每个方向计算的每个功率值，导出L个权重的集合w，其使w H Rw最小化，受制于约束本身是由传感器捕获的声音的协方差矩阵的函数或者基于理论噪声模型的函数。该组权重w用于在特定时刻产生功率谱。本发明的实施例可以用于计算两种类型的频谱：（i）空间频谱和（ii）频谱（或者扩展地说，多普勒频谱）。也就是说，它可以在空间或频域执行。

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