A space-time diversity scheme for interference alignment in uplink cellular systems

被引：0
作者：
Zhang, Jinbo [1 ]
Yuan, Chaowei [2 ]
Wang, Qiucai [3 ]
机构：
[1] Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, The 54th Research Institute of CETC, Shijiazhuang
[2] School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing
[3] School of Electronic and Control Engineering, Chang'an University, Xi'an
来源：
Journal of Information and Computational Science | 2015年 / 12卷 / 16期
基金：
中国国家自然科学基金;
关键词：
Diversity; Interference alignment; Space-time processing;
D O I：
10.12733/jics20106984
中图分类号：
学科分类号：
摘要：
Interference Alignment (IA) can effectively increase Degrees-of-freedom (DOF) for cellular systems. In order to improve the Bit Error Rate (BER) performance, we propose a space-time diversity scheme for IA in uplink cellular systems. In the proposed scheme, the reference interference vectors at different time slots are randomly selected, thus the channel between each user and Base Station (BS) is transformed to a time varying Single Input Single Output (SISO) equivalent channel and the space diversity is transformed to the time diversity in SISO equivalent channel. Moreover, each user transmits different combinations of user's data at each time slot, and the time diversity gains in time varying SISO equivalent channels are achieved. Theoretical analysis and simulation results show that the proposed scheme can significantly improve BER performance without reducing DOF. © 2015 by Binary Information Press
引用
收藏
页码：6177 / 6185
页数：8
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