Low-Overhead Feedback Topology Design for the K-User MIMO Interference Alignment

作     者：Jin, Jin Gao, Xiang-Chuan Li, Xingwang Cavalcante, Charles C. Li, Lihua 

作者机构：Zhengzhou Univ Sch Informat Engn Zhengzhou 450001 Henan Peoples R China Henan Polytech Univ Sch Phys & Elect Informat Engn Jiaozuo 454000 Peoples R China Univ Fed Ceara Wireless Telecommun Res Grp Campus PiciBl 722 BR-60455760 Fortaleza Ceara Brazil Beijing Univ Posts & Telecommun State Key Lab Networking & Switching Technol Beijing 100876 Peoples R China 

出 版 物：《KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS》 (KSII Trans. Internet Inf. Syst.)

年 卷 期：2018年第12卷第11期

页      面：5304-5322页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China [61501404, 61640003] Major Projects in Henan Province Henan Scientific and Technological Research Project Outstanding Young Talent Research Fund of ZZU CNPq-Brazil [309472/2017-2, 408609/2016-8] 

主　　题：Interference alignment channel state information feedback topology interference channel multiple-input-multiple-output 

摘      要：Since designing a feedback topology is a practical way to implement interference alignment at reduced cost of channel state information (CSI) feedback, six feedback topologies have been presented in prior works for a K-user multiple-input multiple-output interference channel To fully reveal the potential benefits of the feedback topology in terms of the saving of CSI overhead, we propose a new feedback topology in this paper. By efficiently performing dimensionality-decreasing at the transmitter side and aligning interference signals at a subset of receivers, we show that the proposed feedback topology obtains substantial reduction of feedback cost over the existing six feedback designs under the same antenna configuration.