基于干扰对齐的NGSO星座系统同频干扰抑制  

Suppression of co-channel interference in NGSO constellation system with interference alignment

作　　者：杜冰 李家旺 王先梅[1] 李伟[2] 刘向南 张海君 DU Bing;LI Jiawang;WANG Xianmei;LI Wei;LIU Xiangnan;ZHANG Haijun(School of Computer&Communication Engineering,University of Science and Technology Beijing,Beijing 100083,China;The State Radio Monitoring Center,Beijing 100037,China)

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083 [2]国家无线电监测中心,北京100037

出　　处：《通信学报》2021年第12期144-151,共8页Journal on Communications

基　　金：国家优秀青年科学基金资助项目(No.61822104)。

摘　　要：针对当前太空中,非静止卫星轨道(NGSO)星座系统日益增加,使用相同频段、轨道邻近的卫星网络越来越多,NGSO星座系统之间以及NGSO星座系统与传统的静止卫星轨道(GSO)星座系统之间的同频干扰日益严重的问题,提出利用无线通信中的干扰对齐算法,根据卫星网络的传输信道信息,在发射端匹配特征信道的预编码矩阵,缓解低轨卫星网络同频干扰问题,在此基础上以ChinaSat、OneWeb和Fortran系统进行仿真,对利用干扰对齐算法前后的干扰数值进行比较,证明了此方法的可行性,为今后此类问题的研究提供了参考。Aiming at the problem that in the current space,non-geostationary satellite orbit(NGSO)constellation systems were increasing day by day,there are more and more satellite networks nearby orbiting using the same frequency band,and the problem of co-channel interference between NGSO constellation systems and between NGSO constellation systems and traditional geostationary satellite orbit(GSO)constellation systems had become increasingly serious,the interference alignment algorithms of wireless communication was proposed,which matches the precoding matrix of the characteristic channel at the transmitter according to the transmission channel information of the satellite network to alleviate the co-channel interference problem of the low-orbit satellite network.The ChinaSat,OneWeb and Fortran systems were used to simulate and compare the interference values before and after using the interference alignment algorithms,which proves the feasibility of the proposed method and provides a reference for future research on such problems.

关 键 词：卫星移动通信系统 非静止卫星轨道 同频干扰 干扰对齐 

分 类 号：TN927[电子电信—通信与信息系统]