基于反馈信道状态信息的水声自适应OFDMA  

Underwater acoustic adaptive OFDMA based on feedback channel state information

作　　者：张育芝 孙彦景 王斌 刘洋 ZHANG Yuzhi;SUN Yanjing;WANG Bin;LIU Yang(School of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China)

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710054 [2]中国矿业大学信息与控制工程学院,江苏徐州221116

出　　处：《系统工程与电子技术》2021年第8期2321-2331,共11页Systems Engineering and Electronics

基　　金：国家自然科学基金(61801372);陕西省教育厅专项科技计划项目(18JK0499);浙江省海洋观测成像试验区重点实验室资助课题。

摘　　要：在时变水声信道中,为了提高自适应正交频分多址(orthogonal frequency division multiple access,OFDMA)在时延反馈信道状态信息(channel state information,CSI)条件下的资源分配性能,提出多节点反馈CSI的时隙复用接入方法,降低反馈时延;提出载波时频相关系数和载波时频均值两种反馈CSI表征参数,通过实验数据分析了两种反馈CSI参数及其对水声自适应OFDMA性能的影响;提出多节点公平的自适应载波、比特、功率联合分配算法,在最大功率和节点吞吐量约束条件下最小化系统误比特率。仿真和湖上实验数据的结果显示,所构建的水声自适应OFDMA系统在多种反馈CSI条件下误比特率均低于交织载波分配,表明其在实际的水声信道应用中具有良好性能。In time-varying underwater acoustic channel,in order to improve the resource allocation performance of adaptive orthogonal frequency division multiple access(OFDMA)under the condition of channel state information(CSI)with time delay feedback,a multi node CSI feedback time-slot reuse access method is proposed to reduce the feedback time delay.And two kinds of feedback CSI characterization parameters,carrier time-frequency correlation coefficient and carrier time-frequency mean are presented.Through experimental data,the two kinds of feedback CSI parameters and their influence on the performance of underwater acoustic adaptive OFDMA is analyzed.Further more,a multi-node fair adaptive joint allocation algorithm of carrier,bit and power is proposed to minimize the bit error rate under the constraints of maximum power and node throughput.The results of simulation and lake experiment data show that the bit error rate of the underwater acoustic adaptive OFDMA system is lower than that of the interleaved carrier allocation system under various feedback CSI conditions,which indicates that it has good performance in practical underwater acoustic channel applications.

关 键 词：水声通信 正交频分多址 信道状态信息 时延 资源分配 

分 类 号：TN929.3[电子电信—通信与信息系统]