基于混沌的近海测距系统的设计与研究

Design and research of offshore ranging system based on chaos

随着海下资源的开发以及军事作战的需求,实现对浅海水域障碍物高精度、高隐蔽性的侦测成为世界各国的重点研究方向,针对近海水域测距时多径效应严重、信号识别困难的问题,设计一种基于混沌的近海探测系统。该系统采用了结构化设计,结合混沌信号类噪声和自互相关特性,对其进行仿真分析以及技术改进,构建合适的信号序列,实现对发射信号的调制,以FPGA为主控芯片,实现近海区域障碍物距离测量,测试结果显示,该系统可满足设计要求。

With the development of subsea resources and the requirements of military operations,the detection of obstacles in shallow waters with high accuracy and concealment has become the key research direction of all countries in the world.In view of the serious multi-path effect and difficult signal recognition in the ranging of offshore waters,a chaotic offshore detection system is designed.The system adopts a structured design,combining with chaotic signal noise and the autocorrelationand cross-correlation characteristic,carries on the simulation analysis and technical improvement,to build a suitable signal sequence,the implementation of emission signal modulation,the FPGA as the main control chip,implement offshore area obstacle distance measurement,the testing results show that the system can meet the design requirements.