甚高通量卫星通信系统多播场景线性预编码算法  

Linear Precoding Algorithm for Multicast Scenarios of Very High Throughput Satellite Communications System

作　　者：魏强 廖瑛[1] 辛宁[2] 张千[2] 郝媛媛 任术波 缪中宇[2] WEI Qiang;LIAO Ying;XIN Ning;ZHANG Qian;HAO Yuanyuan;REN Shubo;MIAO Zhongyu(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Institute of Telecommunication and Navigation Satellites,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]中国空间技术研究院通信与导航卫星总体部,北京100094

出　　处：《航天器工程》2023年第4期21-27,共7页Spacecraft Engineering

基　　金：2022YFB2902700。

摘　　要：在应用全频率复用的甚高通量卫星(VHST)通信系统中,线性预编码作为解决波束间共信道干扰的重要手段而受到广泛关注。文章提出一种VHTS通信系统多播场景下的线性预编码算法,依据数字视频广播第2代扩展标准(DVB-S2X)中多播帧的特点,建立系统吞吐量最大化问题,通过分析用户吞吐量与均方误差的关系,将问题转化为加权均方误差最小化问题,并采用交替方向乘子法(ADMM)将该问题分解为多个并行求解子问题来处理。仿真结果表明:文章提出的算法相比应用最小均方误差(MMSE)的算法可以实现显著的吞吐量增益,且其复杂度无明显增加,可应用于后续全频率复用VHTS通信系统。In the field of VHTS(very high throughput satellite)communications systems with full frequency reuse,linear precoding has attracted widespread attention as an important means to solve the common channel interference of inter-beam.A linear precoding algorithm for VHTS is proposed in multicast scenarios.The problem of maximizing system throughput is considered based on the characteristics of multicast frames in DVB-S2X.By analyzing the relationship between user throughput and mean squared error,the problem is transformed into a weighted mean squared error minimization problem.Then,the problem is decomposed into multiple parallel subproblems solved by using the ADMM(alternating direction method of multipliers).The simulation results show that the proposed algorithm can achieve significant throughput gain compared with the traditional precoding algorithm,and the complexity of the solution is not obviously increased which can be used in the subsequent VHTS communications systems with full frequency reuse.

关 键 词：甚高通量卫星 线性预编码 吞吐量最大化 交替方向乘子法 

分 类 号：TN929.52[电子电信—通信与信息系统]