Optimality of amplify-and-forward based two-way relaying

H. Li, M. W. Liu, S. H. Song, K. B. Letaief

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

3 Citations (Scopus)

Abstract

It has been shown that, with the instantaneous power constraint and joint power allocation, two-way relaying (TWR) outperforms one-way relaying (OWR) in terms of system throughput. However, the conclusion is not clear for the case with the average power constraint and the case with the instantaneous power constraint but separate power allocation. In this paper, we shall first investigate the optimality of TWR with the average power constraint where we consider both of the joint power allocation among three nodes and the separate power allocation between the source and relay nodes. It will be shown that, with the average power constraint, TWR is not always better than OWR. The conditions with which one scheme outperforms the other are derived and utilized to indicate the operating regions for the two schemes. It is observed that the operating region for TWR, where TWR outperforms OWR, increases as the transmit SNR increases. A similar conlcusion is obtained for the case with the instantaneous power constraint and separate power allocation.

Original languageEnglish
Title of host publication2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Pages3715-3719
Number of pages5
DOIs
Publication statusPublished - 21 Aug 2013
Event2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 - Shanghai, China
Duration: 7 Apr 201310 Apr 2013

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Other

Other2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
CountryChina
CityShanghai
Period7/4/1310/4/13

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Keywords

  • Amplify-and-forward
  • average power constraint
  • two-way relaying

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Li, H., Liu, M. W., Song, S. H., & Letaief, K. B. (2013). Optimality of amplify-and-forward based two-way relaying. In 2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 (pp. 3715-3719). [6555165] (IEEE Wireless Communications and Networking Conference, WCNC). https://doi.org/10.1109/WCNC.2013.6555165