多跳水声协作网络中的隐蔽通信与能量消耗优化

(厦门大学 海洋与地球学院,水声通信与海洋信息技术教育部重点实验室,福建 厦门 361102)

水声通信; 协作通信; 隐蔽通信; 能量优化; 检测概率

Optimization of Energy Consumption and Covert Communication for Multi-hop Underwater Acoustic Cooperative Networks
CHEN Yougan,LIU Junhui,XU Xiaomei*

(Key Laboratory of Underwater Acoustic Communication and Marine Information Technology,Ministry of Education,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China)

underwater acoustic communication; cooperative communication; covert communication; energy optimization; detection probability

DOI: 10.6043/j.issn.0438-0479.201610021

备注

多跳水声协作网络可提高数据传输速率、降低系统整体能量消耗,但隐蔽性却大大降低.以在多跳水声协作网络中进行隐蔽通信为目标,研究了相同检测概率情况下如何选择最优跳数使系统功耗最小的方法.根据多跳水声协作网络隐蔽通信系统的检测概率计算模型和能量消耗计算模型,在兼顾检测概率与能量消耗的条件下,推导了系统最佳跳数的取值范围,并仿真分析了不同目标信噪比、通信距离等因素对系统跳数优化选择的影响.仿真结果表明,在给定的仿真条件下,多跳水声协作网络隐蔽通信系统的跳数取值在2~6之间,可满足检测概率小于0.5的隐蔽通信要求,同时系统能量消耗相对较低.

Multi-hop underwater acoustic(UWA)cooperative network can not only improve the data transmission rate but also reduce the energy consumption of the system.Yet its covertness of communication is greatly reduced.The aim of this paper is to study how to select the optimal number of hops in the same probability of detection(PD)to minimize the energy consumption of the system for the multi-hop UWA cooperative network.First,the paper presents the PD model of the UWA cooperative network under certain distance to obtain the relationship between PD and the number of hops.Then,the energy consumption calculation model of the system is established to analyze the energy consumption and the number of hops for the system.Finally,considering both PD and energy consumption,we simulate and analyze the influences of some factors,such as signal-to-noise ratio and communication distance.Simulation results show that the number of hops can be set between 2 and 6,which can meet the covert communication requirement with the PD less than 0.5,and the system energy consumption is relatively low.