舰船辐射噪声中鲸类联络叫声检测方法

发布时间：2018-02-23 06:02

本文关键词： 鲸类联络叫声舰船辐射噪声多项式相位信号预白化处理广义似然比检测　出处：《振动与冲击》2017年11期 　论文类型：期刊论文

【摘要】：鲸类联络叫声的频段与舰船辐射噪声频段的重叠,使其易被误检测为舰船噪声而被被动声纳接收,影响后续对被动声纳检测到的信号进行目标自主识别等信号处理的性能。针对鲸类联络叫声干扰目标识别等声纳信号后续处理的问题,提出舰船辐射噪声中鲸类联络叫声检测算法,为削除鲸类联络叫声干扰作准备,算法首先通过理论与实测数据分析得出舰船辐射噪声频谱分布的短时稳定性特征,进而采用中值滤波方法对舰船辐射噪声进行白化处理,利用三阶多项式相位信号对鲸类叫声建模,然后通过基于匹配滤波器的广义似然比检测方法,实现了舰船辐射噪声中鲸类信号的检测。经实测信号的实验验证,提出的算法适用于不同类型和工况的舰船;通过与其他三种检测方法的比较分析,算法在给定虚警率下可以取得较高的鲸类叫声检测率,检测结果优于其他三种方法。
[Abstract]:The overlapping of the frequency bands of the contact calls of cetaceans with the radiated noise bands of ships makes it easy to be misdetected as ship noise and received by passive sonar. Affecting the performance of subsequent signal processing such as target autonomous recognition of signals detected by passive sonar. For the problems of subsequent processing of sonar signals such as contact calls of cetaceans, interference with target recognition, An algorithm for detecting the contact calls of cetaceans in ship radiated noise is proposed in order to eliminate the interference of contact calls of cetaceans. Firstly, by analyzing the theoretical and measured data, the short-time stability characteristics of the spectrum distribution of ship radiated noises are obtained. Then the median filtering method is used to whiten the ship radiated noise and the third-order polynomial phase signal is used to model the cetacean call. Then the generalized likelihood ratio detection method based on the matched filter is used. The detection of cetacean signals in ship radiated noise is realized. The experimental results show that the proposed algorithm is suitable for ships of different types and working conditions, and is compared with other three detection methods. The algorithm can obtain a higher detection rate of cetaceans under a given false alarm rate, and the detection results are superior to those of the other three methods.
【作者单位】：海军航空工程学院学电子信息工程系;95972部队;
【基金】：国家自然科学基金(61271444) “泰山学者”建设工程专项经费资助(2011)
【分类号】：TN713;TN912.3

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