相位调制水声通信同步算法  

Research on Synchronization Algorithm for Phase Modulated Underwater Acoustic Communication

作　　者：夏清涛[1] 刘忠[1] 罗亚松[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《火力与指挥控制》2012年第7期98-101,共4页Fire Control & Command Control

摘　　要：水声信道中存在大量的脉冲噪声和多普勒频移效应,这会给通信同步带来困难,造成水声通信系统最佳采样位置发生较大偏移,严重影响后续通信算法的处理效果。从复杂水声信道中实现较精确通信同步的目的出发,借助相位调制水声通信系统的特点,综合利用线性调频序列和m序列各自的优势,提出了一种由帧同步、位同步双重机制共同组成的水声通信同步算法,经过仿真、湖试及江试,证明了该算法的有效性。There are serious Doppler frequency shift and a lot of impulse noises in the underwater acoustic channels which increases difficulties for realizing communication synchronization. The synchronization windage will cause the best sampling position offset which will also deteriorate the effects of communication algorithm afterwards. In order to realize accurate communication synchronization in the abominable underwater acoustic environments, this article brings forward a new algorithm for phase modulated systems consisting of frame synchronization and bit synchronization based on the respective advantages of linear frequency modulated series and m series. Using the algorithm is checked to be valid by simulations as well as experiments carried out in lake and river.

关 键 词：水声通信 通信同步 相位调制 线性调频信号 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]