一种适用于水下传感网的动态子载波选择算法  

Dynamic Subcarrier Selection Algorithm for Underwater Acoustic Sensor Networks

作　　者：马路娟 李德识[1] 陈健[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079

出　　处：《计算机仿真》2013年第12期166-169,240,共5页Computer Simulation

基　　金：国家‘973’重点基础研究发展计划(2011CB707106)

摘　　要：在水下通信质量优化问题的研究中,由于水下环境的影响,水下声通信传感器网络频率不稳定,影响通信质量。多载波码分多址接入,虽具有较好的抗干扰性能,但是由于水声链路存在很严重的频率选择性,每个子载波不可能在每个时刻都处于深度衰落,在一个时刻也不可能所有的子载波都处于深度衰落。提出的动态子载波选择算法根据接收端反馈和贝叶斯定理,可以动态的选择通信质量较好的子载波。仿真结果表明,改进算法可以有效的降低误码率。In the research of underwater communication quality optimization, the frequency of UnderWater Acoustic Sensor Networks（UWASNs） is unstable because of underwater environment. The communication quality is im- pacted by this. Although the Multi - Carrier Code Division Multiple Access （ MC - CDMA） has good anti - interfer- ence performance, but it is impossible that all the sub - carriers are in deep fading at the same time or a sub - carrier is in deep fading all the time because of frequency selectivity. The proposed dynamic sub - carrier selective algorithm is based on receiving feedback and Bayes Theorem which can select the sub - carriers with good performance adaptively. Simulation results show that the improved algorithm has good performance in bit error rate（BER）.

关 键 词：水下声通信传感器网络 频率选择性 动态子载波选择 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]