Channel Correlation Based User Grouping Algorithm for Nonlinear Precoding Satellite Communication System

作     者：Ke Wang Baorui Feng Jingui Zhao Wenliang Lin Zhongliang Deng Dongdong Wang Yi Cen Genan Wu Ke Wang;Baorui Feng;Jingui Zhao;Wenliang Lin;Zhongliang Deng;Dongdong Wang;Yi Cen;Genan Wu

作者机构：School of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China School of Information EngineeringMinzu University of ChinaBeijing 100081China Institute of Spacecraft Application System EngineeringChina Academy of Space TechnologyBeijing 100094China Academy for Network and Communications of CETCScience and Technology on Communication Networks LaboratoryShijiazhuang 050081China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2024年第21卷第1期

页      面：200-214页

核心收录：

学科分类：0810[工学-信息与通信工程] 080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the Key R&D Project of the Ministry of Science and Technology of China(2020YFB1808005) 

主　　题：channel correlation inter-beam interference multibeam satellite Tomlinson-Harashima precoding user grouping 

摘      要：Low Earth Orbit(LEO)multibeam satellites will be widely used in the next generation of satellite communication systems,whose inter-beam interference will inevitably limit the performance of the whole *** precoding such as Tomlinson-Harashima precoding(THP)algorithm has been proved to be a promising technology to solve this problem,which has smaller noise amplification effect compared with linear ***,the similarity of different user channels(defined as channel correlation)will degrade the performance of THP *** this paper,we qualitatively analyze the inter-beam interference in the whole process of LEO satellite over a specific coverage area,and the impact of channel correlation on Signal-to-Noise Ratio(SNR)of receivers when THP is *** user grouping algorithm is proposed based on the analysis of channel correlation,which could decrease the number of users with high channel correlation in each precoding group,thus improve the performance of ***,our algorithm is designed under the premise of co-frequency deployment and orthogonal frequency division multiplexing(OFDM),which leads to more users under severe inter-beam interference compared to the existing research on geostationary orbit satellites broadcasting *** results show that the proposed user grouping algorithm possesses higher channel capacity and better bit error rate(BER)performance in high SNR conditions relative to existing works.