Design And Implementation Of Anti-frogman Sonar Signal Detector System

The research work of this paper to energy detection and non-cooperative spectrum entropy detection for detection algorithm,aiming at frogman detecting sonar pulse signal in shallow sea problem detection algorithm under the condition of feasibility analysis,simulation and experimental validation.This paper includes the author's simulation and application of the spectrum entropy detection algorithm for energy detection and non-cooperation,the design of related hardware system,and the concrete experimental verification and result analysis.The detection of pulse signals has always been the core content and technical difficulty of detecting sonar signals.This article system at work,need to frequency,form unknown,unknown parameters such as pulse width,start-stop time unknown cannot completely unpredictable existence the frogloks sonar signal detection,so this paper mainly USES the entropy based on the cooperative spectrum detection algorithm.Because this article system for low power consumption,spectrum entropy detection algorithm of large amount of calculation and continuous detection power consumption is bigger,so this article only at ordinary times at a relatively low frequency energy on the hardware detection,when found suspected sonar pulse signal,and detection of high frequency spectrum entropy.Energy detection on the time domain and frequency domain entropy detection for joint detection,can better deal with the reality of complex neritic signal environment,the greatest degree of reduce the false alarm probability and miss probability.Due to the limited processing power of microcontroller chip used in this paper,the signal is segmented,and each signal is processed by step,which reduces the computation amount of the single time and can be processed in real time.Pulse signal of time domain and frequency domain combined segmentation algorithms through the window function,to segment of the signal,for each signal is step by step processing,reduce the computational burden of the single,basic achieves real-time processing.The combined detection of time domain and frequency domain can better cope with the complicated shallow sea signal environment in reality,and reduce the probability of false alarm and the probability of omission.In this paper,the significance,development course and current situation of the detection of anti-frogman sonar signal are briefly introduced.By Lord,passive sonar equation and the related sonar design principle,the former sea application environment parameters are reasonable,and get the required technical indicators system,and through matlab modeling and simulation of time domain and frequency domain combined pulse signal segmentation algorithm for feasibility analysis.Finally,the application effect of the system is evaluated by the cistern experiment.The system is studied and analyzed by the success rate of the actual sonar signal detection.Through experiment,some engineering experience can be obtained,which can be used for future research and engineering practice.