KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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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)
  • Received : 2017.11.02
  • Accepted : 2018.06.22
  • Published : 2018.11.30
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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.

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References

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