Subcarrier BD with Cooperative Communication for MIMO-NOMA System  

作　　者：Jung-In Baik Ji-Hwan Kim Beom-Sik Shin Ji-Hye Oh Hyoung-Kyu Song 

机构地区：[1]Department of Information and Communication Engineering,and Convergence for Intelligent Drone,Sejong University,Seoul,05006,Korea

出　　处：《Computers, Materials & Continua》2022年第9期5807-5821,共15页计算机、材料和连续体（英文）

基　　金：This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(2020R1A6A1A 03038540);was supported by Institute for Information&communications Technology Promotion(IITP)grant funded by the Korea government(MSIT)(No.2017-0-00217,Development of Immersive Signage Based on Variable Transparency and Multiple Layers)。

摘　　要：With the rapid evolution of Internet of things(IoT),many edge devices require simultaneous connection in 5G communication era.To afford massive data of IoT devices,multiple input multiple output non-orthogonal multiple access(MIMO-NOMA)method has been considered as a promising technology.However,there are numerous drawbacks due to error propagation and inter-user interferences.Therefore,proposed scheme aims to improve the reliability of the MIMO-NOMA system with digital beamforming and intracluster cooperative multi point(CoMP)to efficiently support IoT system.In the conventional MIMO-NOMA system,user entities are grouped into clusters.Block diagonalization(BD)is applied to efficiently eliminate the inter-cluster interference of the MIMO-NOMA system.However,since the channel path of the data stream from a single antenna to a single cluster doesn’t hold other cluster’s data,the system can’t fully utilize the selective subcarrier channel states.It indicates that there can be better channel paths for a data stream at a certain subcarrier index.Therefore,proposed scheme allocates data streams to antennas adaptively considering selective channel states.Additionally,intra-cluster CoMP method is adjusted to enhance the reliability of the system in the clusters.The simulation results show that the proposed scheme improves BER and throughput performance compared to the conventional MIMO-NOMA system.

关 键 词：5G MIMO-NOMA COMP BD INTERFERENCE 

分 类 号：TN91[电子电信—通信与信息系统]