基于截获因子的直序扩频水声通信隐蔽性能分析

发布时间：2018-01-20 18:45

本文关键词： 水声通信直接序列扩频截获因子隐蔽性能　出处：《南京大学学报(自然科学)》2017年04期 　论文类型：期刊论文

【摘要】：研究了对数正态衰落水声信道条件下直接序列扩频通信的隐蔽性能.首先建立水声隐蔽通信系统模型,提出了基于可检测距离的截获因子作为衡量水声通信系统隐蔽性的方法.理论研究了直接序列扩频信号经过对数正态衰落水声信道传输后,截获接收机能量检测工作特性以及通信接收机同步相关检测特性和扩频通信误码性能.仿真分析了不同的信道衰减参数及信号参数、调制方式等对水声通信系统隐蔽性能的影响.仿真结果表明:在对数正态衰落水声信道条件下,直序扩频通信具有低截获通信能力;在一定条件下,降低发射载波频率、增大信号时间带宽积、降低调制阶数和通信速率将有利于提升水声通信隐蔽性;浅海信道比深海信道更利于隐蔽通信,近程水声通信比中远程通信更容易实现隐蔽.
[Abstract]:The concealment performance of direct sequence spread spectrum (DSSS) communication in logarithmic normal fading underwater acoustic channel is studied. Firstly, the model of underwater acoustic covert communication system is established. An interception factor based on detectable distance is proposed as a method to measure the concealment of underwater acoustic communication system. The direct sequence spread spectrum (DSSS) signals are transmitted through logarithmic normal fading underwater acoustic channels. The performance of acquisition receiver energy detection and communication receiver synchronization correlation detection and spread spectrum communication error performance. Different channel attenuation parameters and signal parameters are simulated and analyzed. Simulation results show that direct-sequence spread spectrum communication has low interception capability in logarithmic normal fading underwater acoustic channel. Under certain conditions, reducing carrier frequency, increasing signal time bandwidth product, decreasing modulation order and communication rate will help to improve the concealment of underwater acoustic communication. Shallow water channel is more favorable to covert communication than deep sea channel, and short range underwater acoustic communication is easier to realize concealment than middle and long distance communication.
【作者单位】：海军潜艇学院;
【基金】：中国博士后基金(2014M552658)
【分类号】：TN929.3
【正文快照】： 随着水声通信技术在军事领域应用的不断拓展,水声通信隐蔽性能的研究越来越受到重视.隐蔽水声通信要求在实现可靠信息传输的同时,降低信号被第三方检测的概率,以实现低截获概率通信.直接序列扩频(Direct-sequencespread-spectrum,DSSS)技术具有很强的低截获性和抗干扰能力,已

【相似文献】