一种基于DSP的声信标弱信号提取方法

摘要

介绍一种基于DSP处理模块实现声信标弱信号提取的方法。针对声信标的性能参数及其具体应用环境，采用一种在加性白噪声环境下能够使信号的输出信噪比达到最大的匹配滤波方法，并将其在DSP处理模块上实现，最终将检测结果以音频和视频的形式输出。经过实际应用测试，该方法易于实现，实时性好，在复杂的海洋背景噪声下可以较好提高声信标的作用距离。%This paper introduces a method to realize weak hydroacoustic beaconing signal detecting base on DSP. According to the capability parameters of the hydroacoustic beaconing that the subject have adopted and the application of the hydroacoustic beaconing to the specific environment, also because the matching filter is the best filter means in the condition of additive white noise, it can make the SNR of the output signal to maximize, so this paper adopted the matching filter method, and at last the subject realized weak hydroacoustic beaconing signal detecting on DSP module. After real testing, the system which is good for weak hydroacoustic beaconing signal detecting can run real-time and realize easily. After sea trials, the system using the method can quickly find the target when hydroacoustic beaconing in a long distance. The sea trials shows the method can improve detection distance and easy to use in the areas of the weak hydroacoustic beaconing signal detecting.