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CLC number: TN92

On-line Access: 2017-06-30

Received: 2017-01-09

Revision Accepted: 2017-04-06

Crosschecked: 2017-05-30

Cited: 1

Clicked: 3673

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Chuan Huang

http://orcid.org/0000-0001-5965-0823

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Frontiers of Information Technology & Electronic Engineering  2017 Vol.18 No.6 P.808-816

http://doi.org/10.1631/FITEE.1700022


Optimal precoding for full-duplex base stations under strongly correlated self-interference channels


Author(s):  Jun Wang, Xiao-jie Wen, Chuan Huang, Chao-jin Qing

Affiliation(s):  College of Electrical and Information Engineering, Southwest University for Nationalities, Chengdu 610041, China; more

Corresponding email(s):   13880458609@139.com, ziwen7189@aliyun.com, huangch@uestc.edu.cn, qingchj@uestc.edu.cn

Key Words:  Linear precoding, Full-duplex, Achievable rate region, Strongly correlated self-interference channel


Jun Wang, Xiao-jie Wen, Chuan Huang, Chao-jin Qing. Optimal precoding for full-duplex base stations under strongly correlated self-interference channels[J]. Frontiers of Information Technology & Electronic Engineering, 2017, 18(6): 808-816.

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Abstract: 
We study the optimal precoding for a full-duplex (FD) system, where one FD multi-antenna base station (BS) respectively transmits to and receives from two half-duplex single-antenna mobile users (MUs) on the same time slot and frequency band. At the FD BS, the received signal from the desired MU is severely affected by the extremely strong self-interference (SI) from its transmit antennas to the receive antennas. In the presence of residual SI after imperfect SI cancellation, the downlink transmission rate maximization problem subject to a targeted uplink rate is formulated as a non-convex optimization problem to characterize the achievable rate region for the considered system. Considering the case in which the SI channel is strongly correlated, the above problem is transformed into a convex problem by exploiting the rank-one property of the SI channel, which can be solved efficiently. Finally, numerical results validate the effectiveness of the proposed scheme.

强相关自干扰信道下全双工基站的最优预编码

概要:考虑了包含1个全双工多天线基站、2个半双工单天线移动用户的全双工蜂窝系统,研究了其全双工多天线基站的最优预编码方案。由于全双工多天线基站在同一频段上同时收发数据,其接收来自远端用户的期望信号将会受到来自本地发射天线大功率自干扰信号的严重影响。由于现有自干扰消除技术不能将自干扰信号完全抵消,考虑存在残余自干扰信号的场景,构造了上行传输速率受限的下行传输速率最大化问题,以刻画上述全双工蜂窝系统的可达速率区域。然而,上述问题不是凸优化问题。鉴于此,考虑强相关自干扰信道场景,利用自干扰信道矩阵秩为1的特点,将上述非凸优化问题变换为凸优化问题,并利用凸优化工具对其求解,得到全双工多天线基站的最优预编码方案。最后,通过数值仿真验证了该方案的有效性。

关键词:线性预编码;全双工;可达速率区域;强相关自干扰信道

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