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http://dx.doi.org/10.3837/tiis.2018.11.008

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

Jin, Jin (School of Information Engineering, Zhengzhou University)
Gao, Xiang-Chuan (School of Information Engineering, Zhengzhou University)
Li, Xingwang (School of Physics and Electronic Information Engineering, Henan Polytechnic University)
Cavalcante, Charles Casimiro (Wireless Telecommunications Research Group, Federal University of Ceara)
Li, Lihua (State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.12, no.11, 2018 , pp. 5304-5322 More about this Journal
Abstract
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.
Keywords
Interference alignment; channel state information; feedback topology; interference channel; multiple-input-multiple-output;
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Times Cited By KSCI : 3  (Citation Analysis)
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