| The cooperative target hydroacoustic positioning system is a long-baseline positioning system that works in a synchronous manner.When working,the buoy signal processing platform estimates the time delay of the pulse signal emitted by the cooperative target and transmits it to the display and control platform.This paper mainly studies the signal processing algorithm of the buoy signal processing platform and the design and implementation of software and hardware functions.The main task of the buoy signal processing platform is to filter,detect and estimate the parameters of the multi-frequency CW pulses sent by the cooperative targets.This paper first studies the principles of single-channel adaptive notch filter and multi-channel adaptive notch filter.Then,on the basis of analyzing the principle of the instantaneous frequency variance detector,a joint detection method is proposed for the channel cross-leakage phenomenon.Then,simulation analysis is carried out on the principle of phase compensation method delay estimation and frequency point self-tracking adaptive frequency estimator.Secondly,on the premise of analyzing the functional requirements and technical indicators of the system,this paper designs the hardware structure of the buoy signal processing hardware platform,and elaborates on the selection and design of each hardware function module based on this.Then the software function requirements of the buoy signal processing platform are analyzed,and the software function framework is designed.According to the function,the functions of buoy software can be divided into signal processing software and auxiliary function software.After that,the key technology of software development is introduced,and the software functions of the buoy are designed and implemented on this basis.Finally,this paper tests the hardware indicators of the buoy signal processing platform.The signal processing algorithm is verified through the electrical simulator joint debugging and lake test.The buoy signal processing platform designed in this paper can fulfill various functional requirements of the positioning system. |
