On the Finite-SNR DMT of Two-Way AF Relaying with Imperfect CSI

A general framework of finite-SNR diversity-multiplexing tradeoff (DMT) is formulated to evaluate the impact of imperfect channel estimation in two-way amplify-and-forward (AF) relaying systems over Nakagami-m fading channels. Imperfect self-interference cancellation and signal detection are performed at both sources due to channel estimation errors. The overall outage probability (OOP) is obtained and then the finite-SNR DMT is derived in the presence of channel estimation errors. Furthermore, the asymptotic and limiting behavior expressions of the finite-SNR DMT are also evaluated adequately. Numerical results verify the theoretical analysis and show that at realistic SNR and channel estimation quality, the DMT is significantly lower than the asymptotic result.

[1]  Yang Han,et al.  Adaptive two-way relaying and outage analysis , 2009, IEEE Transactions on Wireless Communications.

[2]  Jianhua Ge,et al.  Symbol Error Probability of Two-Way Amplify-and-Forward Relaying , 2011, IEEE Communications Letters.

[3]  Ravi Narasimhan.  CTH05-1: Effect of Channel Estimation Errors on Diversity-Multiplexing Tradeoff in Multiple Access Channels , 2006, IEEE Globecom 2006.

[4]  Robert W. Heath,et al.  On the Capacity and Diversity-Multiplexing Tradeoff of the Two-Way Relay Channel , 2008, IEEE Transactions on Information Theory.

[5]  Meixia Tao,et al.  Finite-SNR Diversity-Multiplexing Tradeoff for Two-Way Relay Fading Channel , 2010, 2010 IEEE International Conference on Communications.

[6]  Catherine Douillard,et al.  Finite-SNR Diversity-Multiplexing Tradeoff for , 2013 .

[7]  I. S. Gradshteyn,et al.  Table of Integrals, Series, and Products , 1976 .

[8]  A. Wittneben,et al.  Spectral Efficient Signaling for Half-duplex Relay Channels , 2005, Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005..

[9]  Pingzhi Fan,et al.  Exact Performance of Two-Way AF Relaying in Nakagami-m Fading Environment , 2011, IEEE Transactions on Wireless Communications.

[10]  Lizhong Zheng,et al.  Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels , 2003, IEEE Trans. Inf. Theory.

[11]  Il-Min Kim,et al.  Finite-SNR Diversity-Multiplexing Tradeoff in Bidirectional Cooperative Networks , 2010, 2010 IEEE International Conference on Communications.