An efficient method for channel state information feedback in the relay X-channel

Mohsen Rezaee, Behrouz Maham

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The two-user relay-assisted X channel is considered when no channel state information (CSI) is available at the transmitter side. It is known that with a 2M-antenna relay and M-antenna users a DoF of 4M/3 is achieved in this channel if CSI is available at the relay. This is equal to the maximum achievable DoF in the ordinary X-channel (with no relay) with perfect CSI at the transmitters. An efficient CSI feedback method is proposed which reduces the amount of feedback necessary for the relay in order to maintain the maximum DoF. In addition, a quantization method is proposed for the case of limited feedback. The proposed method outperforms the conventional methods in terms of the number of feedback bits. Simulation results show performance improvement in the finite-SNR regime.

Original languageEnglish
Title of host publication2017 IEEE International Black Sea Conference on Communications and Networking, BlackSeaCom 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
Volume2018-January
ISBN (Electronic)9781509050499
DOIs
Publication statusPublished - Jan 31 2018
Event2017 IEEE International Black Sea Conference on Communications and Networking, BlackSeaCom 2017 - Istanbul, Turkey
Duration: Jun 5 2017Jun 8 2017

Other

Other2017 IEEE International Black Sea Conference on Communications and Networking, BlackSeaCom 2017
CountryTurkey
CityIstanbul
Period6/5/176/8/17

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Keywords

  • decode-and-forward relay
  • degrees of freedom
  • relay X channel

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Signal Processing

Cite this

Rezaee, M., & Maham, B. (2018). An efficient method for channel state information feedback in the relay X-channel. In 2017 IEEE International Black Sea Conference on Communications and Networking, BlackSeaCom 2017 (Vol. 2018-January, pp. 1-4). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BlackSeaCom.2017.8277697