Abstract
This paper analyzes the outage performance of cooperative protocols for the two-way relaying model in which a half-duplex relay assists in the bi-directional communication of two terminals. We first define the outage events and derive closed form results for the outage probabilities of conventional nonadaptive Amplify-and-Forward (AF) and Decode-and-Forward (DF) two-way relaying protocols.We then consider a simple adaptive protocol in the two-way relaying scenario, which switches between AF and DF depending on the decodability of the two bi-directional data streams at the relay. We also derive the outage probability for this adaptive scheme in closed form expressions, and our results show that it always outperforms the non-adaptive schemes. All the closed form results derived in this paper are applicable to arbitrary channel gains between terminals.
| Original language | English |
|---|---|
| Article number | 5090009 |
| Pages (from-to) | 3288-3299 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 8 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2009 |
| Externally published | Yes |
Funding
Manuscript received September 9, 2008; revised January 7, 2009 and March 17, 2009; accepted March 22, 2009. The associate editor coordinating the review of this paper and approving it for publication was H. Dai. Q. Li, S. H. Ting, and Y. Han are with the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (e-mail: {liqi0008, shting, hany0008}@ntu.edu.sg). A. Pandharipande is with Philips Research Europe - Eindhoven, High Tech Campus, 5656 AE Eindhoven, Netherlands (e-mail: [email protected]). This work was partly supported by the Singapore Ministry of Education Academic Research Fund Tier 1, RG74/07. Digital Object Identifier 10.1109/TWC.2009.081213
Keywords
- Amplify-and-forward
- Bi-directiona l
- Decode-and-forward
- Half-duplex
- Outageprobability
- Two-wayrelaying