Opportunistic Multiuser Two-Way Amplify-And-Forward Relaying with a Multiantenna Relay

Duckdong Hwang, Bruno Clercks, Sung Sik Nam, Tae Jin Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We consider the opportunistic multiuser diversity in the multiuser two-way amplify-And-forward (AF) relay channel. The relay, which is equipped with multiple antennas and a simple zero-forcing beamforming (ZFBF) scheme, selects a set of two way relaying user pairs to enhance the degree of freedom (DoF) and, consequently, the sum throughput of the system. The proposed channel-Aligned pair scheduling (CAPS) algorithm reduces the interpair interference and keeps the signal-To-interference-plus-noise-power ratio (SINR) of user pairs that are interference-free when the number of user pairs becomes very large. When the number of user pairs grows fast enough with the system signal-To-noise ratio (SNR), a DoF equal to the number of relay antennas can be achieved. For a realistic number of user pairs, we propose an adaptive CAPS and an adaptive semi-orthogonal CAPS (SCAPS) to improve performance. Simulation results show that adaptive CAPS and adaptive SCAPS provide throughput gain in the low-To-mid SNR region.

Original languageEnglish
Article number7120995
Pages (from-to)3777-3782
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume65
Issue number5
DOIs
Publication statusPublished - 2016 May 1

Fingerprint

Amplify-and-forward
Relay
Scheduling
Signal to noise ratio
Throughput
Antennas
Beamforming
Scheduling algorithms
Interference
Degree of freedom
Multiuser Diversity
Zero-forcing
Relay Channel
Multiple Antennas
Scheduling Algorithm
Antenna

Keywords

  • amplify and forward
  • degree of freedom
  • opportunistic user pair selection
  • Two-way relaying

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Opportunistic Multiuser Two-Way Amplify-And-Forward Relaying with a Multiantenna Relay. / Hwang, Duckdong; Clercks, Bruno; Nam, Sung Sik; Lee, Tae Jin.

In: IEEE Transactions on Vehicular Technology, Vol. 65, No. 5, 7120995, 01.05.2016, p. 3777-3782.

Research output: Contribution to journalArticle

Hwang, Duckdong ; Clercks, Bruno ; Nam, Sung Sik ; Lee, Tae Jin. / Opportunistic Multiuser Two-Way Amplify-And-Forward Relaying with a Multiantenna Relay. In: IEEE Transactions on Vehicular Technology. 2016 ; Vol. 65, No. 5. pp. 3777-3782.
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