基于极化调制的星间链路通信算法研究  

Intersatellite link communication algorithm based onpolarization modulation

作　　者：张如生 王星星 徐斌 贾松霖 苏敏 宁金枝 王韶波[2] ZHANG Rusheng;WANG Xingxing;XU Bin;JIA Songlin;SU Min;NING Jinzhi;WANG Shaobo(Major and Special Engineering Center,State Administration of Science,Technology and Industry for National Defense,Beijing 100048,China;DFH Satellite Co.,Ltd.,Beijing 100094,China)

机构地区：[1]国家国防科技工业局重大专项工程中心,北京100048 [2]航天东方红卫星有限公司,北京100094

出　　处：《先进小卫星技术（中英文）》2024年第1期47-55,共9页Advanced Small Satellite Technology

基　　金：民用航天预研项目(D010206)。

摘　　要：现有的星间链路通信中,主要采用频分多址(Frequency Division Multiple Access,FDMA)和时分多址(Time Division Multiple Access,TDMA)提高频谱利用率和信息传输的时效性,FDMA和TDMA分别通过分配不同的频点和时隙区分不同的星间链路.随着卫星数量的增多,尤其是低轨卫星星座的不断建设,星间链路的频谱和时隙越发紧缺,这对采用FDMA和TDMA体制的星间链路带来了严峻挑战.针对此问题,提出了一种极化多址接入的星间链路体制,引入极化调制算法,利用信号的极化状态承载信息.仿真验证表明:极化多址星间链路体制在频谱效率和时效性能方面相比现有星间链路算法分别提升了18倍和2倍,在很大程度上解决了星间链路频谱和时隙资源紧缺的问题,为后续星间链路设计提供了参考.Frequency division multiple access and time division multiple access are mainly used to improve the spectral efficiency and the timeliness of information transmission in the existing inter-satellite link,which can distinguish different frequency and time slots respectively.With the increasing number of satellite,especially the constellation of low Earth orbit satellites,the spectrum and time slot of inter-satellite links become more and more scarce,which brings severe challenges to the FDMA and TDMA systems-based inter-satellite links.To solve this problem,an inter-satellite systems with polarization multiple access were proposed,which introduced the polarization modulation algorithm by using the polarization state of the signal to carry the information.Simulation results show that the polarized multiple access inter-satellite link has 1.8 times and 2 times higher in spectral efficiency and time efficiency respectively compared with the existing algorithms.This algorithm solves the shortage of spectrum and time slot resources between inter-satellite links greatly,and provides a reference for the inter-satellite link desigh.

关 键 词：星间链路 极化多址 极化调制 去极化效应 频谱效率 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]