卫星物联网系统随机接入前导序列设计  

Random Access Preamble Design of Satellite Internet of Things System

作　　者：张志丽[1] 王力权[1] 王艳君[1] 解立坤 王茹 ZHANG Zhili;WANG Liquan;WANG Yanjun;XIE Likun;WANG Ru(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2020年第5期534-540,共7页Radio Communications Technology

基　　金：河北省科技重大专项(18040403Z)。

摘　　要：针对卫星物联网系统波束内传输时延较大和波束覆盖范围广的特点,对随机接入设计方案进行了讨论,同时分析了影响GEO卫星系统随机接入前导序列设计的因素,提出了卫星物联网系统的随机接入前导序列设计方法,并对所设计参数的TOA估计误差进行仿真评估与研究。仿真结果表明,该方法适用于卫星物联网系统,可基本满足大往返时延差下正常的随机接入过程。To address the properties of large transmission delay and wide beam coverage in satellite IoT(Internet of Things)system,this paper discusses the random access design scheme and analyzes the factors affecting random access preamble sequence design of GEO(Geosynchronous Orbit)satellite system.Moreover,this paper proposes a design scheme of random access preamble sequence for satellite IoT system,and then simulates the TOA(Time of Arrival)estimation error of the designed parameters.Simulation results demonstrate that the design scheme is applicable to satellite IoT system,which can basically meet the normal random access process under large transmission delay.

关 键 词：卫星通信 物联网 随机接入 前导序列 

分 类 号：TN927[电子电信—通信与信息系统]