Performance Evaluation with Improved Receiver Design for Asynchronous Coordinated Multipoint Transmissions

作     者：CAO Yuan WEN Yinghong MENG Xiangyang XU Wei 

作者机构：National Engineering Research Center of Rail Transportation Operation and Control System. Beijing Jiaotong University School of Electronic and Information EngineeringBeijing Jiaotong University National Mobile Communications Research Lab.Southeast University 

出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))

年 卷 期：2016年第25卷第2期

页      面：372-378页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China(No.U1534208) National“Twelfth Five-Year”Plan for Science&Technology Support(No.2015BAG12B01) 

主　　题：Joint transmission Asynchronous reception Global precoding CoMP 

摘      要：Joint transmission is one of the ma jor transmission schemes in Coordinated multipoint(Co MP)transmission/reception systems for Long term evolutionadvanced(LTE-A). Due to different distances between User equipments(UE) and Base stations(BS), signals are not able to arrive at the receiver with perfect synchronization, which implies that the reception at UE is asynchronous. This paper presents an evaluation on asynchronous UE reception in multi-cell downlink joint transmission systems using our LTE-based Co MP ***, due to asynchronous reception, we propose an improved reception strategy to mitigate the interference which compensate for Rx timing difference on Joint transmission(JT) Co MP systems. Simulation results show that the per-subband global precoding scheme widely used in the Co MP system is considerably sensitive to asynchronous reception since the performance is dominated by the subcarrier used for precoding vector calculation. It is verified that our proposed solution is able to achieve significant improvements under asynchronous reception.