基于部分信道信息的卫星移动链路ACM方法  

An ACM Method Based on Partial Channel Information for Mobile Satellite Link

作　　者：韦亮 宋高俊[1] 田亮 WEI Liang;SONG Gao-jun;TIAN Liang(College of Information Engineering,Nanchang Hangkong University,Nanchang,Jiangxi 330063,China)

机构地区：[1]南昌航空大学信息工程学院,江西南昌330063

出　　处：《电子学报》2018年第9期2063-2067,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61362013);江西省研究生创新专项资金项目(No.YC2016-S347)

摘　　要：在卫星移动通信环境下,由于信道时变特性以及巨大的往返传输延迟,极大地限制了卫星自适应编码调制(adaptive coding and modulation)技术的应用.为了解决这个问题,根据卫星移动通信上下行链路的视线信道分量满足近似互易性的特点,本文提出了一种基于部分信道信息的自适应调制编码方法.在满足平均发射功率和平均比特错误率的约束条件下,导出了最优的自适应编码调制策略和功率分配方法.提出的方法克服了现有自适应方法的局限性,同时,通过频谱效率性能的仿真验证了提出方法的有效性.Due to the time-varying of the channel and the huge round-trip delay,the application of adaptive coding and modulation(ACM)technique is greatly limited in the mobile satellite environment.In order to solve this problem,an ACM method using partial channel information is proposed based on the characteristics of the line-of-sight component between uplink and downlink,which satisfy the approximate reciprocity in mobile satellite communication.This paper presents an optimized ACM strategy and power allocation method with the constraint of the average transmit power and the average bit error rate,which overcome the limitations of existing adaptation.At the same time,the simulation results also show the effectiveness of the proposed method.

关 键 词：卫星移动通信 自适应编码调制 莱斯阴影模型 传输延迟 部分信道信息 频谱效率 

分 类 号：TN927[电子电信—通信与信息系统]