移动网络中多用户下行非相干MIMO通信  

Multiuser Downlink Non-coherent MIMO Communication in Mobile Network

作　　者：林梦莹 郑霖[1,2] 杨超 LIN Mengying;ZHENG Lin;YANG Chao(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]广西无线宽带通信与信号处理重点实验室,广西桂林541004

出　　处：《无线电工程》2021年第8期773-778,共6页Radio Engineering

基　　金：广西自然科学基金资助项目(2020GXNSFAA159067);认知无线电与信息处理教育部重点实验室2020年开放基金项目(CRKL200102,CRKL200105)。

摘　　要：非相干多输入多输出(Multiple Inputs Multiple Outputs,MIMO)检测不仅具有抗随机相位干扰,对多普勒频偏不敏感的特点,还可以获得空分复用增益。针对多用户下行非相干MIMO系统中的共信道干扰问题,通过理论推导及仿真验证了预编码算法能够有效解决移动网络中多用户下行随相处理系统的干扰问题。通过仿真给出了莱斯信道下多用户非相干MIMO系统与多用户相干MIMO系统的性能比较,验证了非相干MIMO在多用户环境下的可行性,以及其抗随机相位干扰、抗频偏的特性。Non-coherent MIMO detection is not only immune to random phase interference and is not sensitive to the Doppler shift,but also can obtain space-division multiplexing gain.Aiming at the problem of co-channel interference in multi-user downlink non-coherent MIMO system,the theoretical derivation and simulation verify that the precoding algorithm can effectively solve the problem of the interference problem of random phase processing of multi-user downlink in mobile network.The simulation results show the performance of the multi-user non-coherent MIMO system is compared with the performance of multi-user coherent MIMO system in the Rician channel,and verify the feasibility of the non-coherent MIMO system in the multi-user environment,as well as its immunity to random phase interference and Doppler shift.

关 键 词：多用户多输入多输出 非相干检测 预编码 空分复用 

分 类 号：TN911[电子电信—通信与信息系统]