NDLI: Outage Probability and Finite-SNR Diversity–Multiplexing Tradeoff for Two-Way Relay Fading Channels

Content Provider	IEEE Xplore Digital Library
Author	Xiaochen Lin Meixia Tao Youyun Xu Rui Wang
Copyright Year	1967
Abstract	In this paper, we analyze the outage probability and finite-SNR diversity-multiplexing tradeoff (f-DMT) performance for two-way relay channels (TWRCs). Both amplify-and-forward (AF) and decode-and-forward (DF) relay protocols are considered. The two source nodes are equipped with single antenna, and the relay is equipped with single or multiple antennas. First, we derive lower bounds of outage probability for single- and multiantenna relay AF, upper and lower bounds for multiantenna relay DF, and the exact closed-form expression for single-antenna DF. These results are suitable for arbitrary time-sharing and rate allocation for DF and arbitrary rate allocation for AF. Numerical results show that the derived lower bounds approximate very well the actual outage performance obtained by Monte Carlo simulation. Based on the tight lower bounds, we further derive estimates of the f-DMTs. We find that AF always outperforms DF in terms of f-DMT in all SNR regimes. However, the comparison result of outage performance between AF and DF depends on channel conditions. Finally, we also discuss the impact of relay location, time-sharing, and rate allocation on the outage and f-DMT via numerical examples.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	3123
Ending Page	3136
Page Count	14
File Size	1073171
File Format	PDF
ISSN	00189545
Volume Number	62
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Protocols Signal to noise ratio Antennas Resource management Multiplexing Diversity methods two-way relay channels (TWRCs) Amplify-and-forward (AF) decode-and-forward (DF) diversity–multiplexing tradeoff (DMT) outage probability
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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