Blind Channel Estimation for OFDM Modulated Two-Way Relay Network

In this paper, we develop a simple blind channel estimation algorithm for two-way relay network (TWRN) that consists of two terminal nodes and one relay node. We consider the frequency selective channels and adopt the orthogonal frequency-division multiplexing (OFDM) modulation to compensate the inter-symbol interference (ISI). By applying a non-redundant linear precoding at both terminals, we propose an algorithm that is effective of estimating two cascaded channels and is consistent with the two-phase two-way transmission protocols. The method to remove the inherent ambiguity of the blind channel estimation is discussed. Finally, the numerical results are provided to corroborate the proposed studies.

[1]  Dirk T. M. Slock,et al.  Linear precoding for spatial multiplexing MIMO systems: blind channel estimation aspects , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[2]  Soung Chang Liew,et al.  > Replace This Line with Your Paper Identification Number (double-click Here to Edit) < 1 , 2022 .

[3]  Eric Moulines,et al.  Subspace methods for the blind identification of multichannel FIR filters , 1995, IEEE Trans. Signal Process..

[4]  Tracey Ho,et al.  Distributed Space–Time Coding for Two-Way Wireless Relay Networks , 2008, IEEE Transactions on Signal Processing.

[5]  Ying-Chang Liang,et al.  Optimal channel estimation and training design for two-way relay networks , 2009, IEEE Transactions on Communications.

[6]  Emre Telatar,et al.  Capacity of Multi-antenna Gaussian Channels , 1999, Eur. Trans. Telecommun..

[7]  Sachin Katti,et al.  Embracing wireless interference: analog network coding , 2007, SIGCOMM '07.

[8]  Ying-Chang Liang,et al.  Optimal Analogue Relaying with Multi-Antennas for Physical Layer Network coding , 2008, 2008 IEEE International Conference on Communications.

[9]  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..

[10]  Gregory W. Wornell,et al.  Cooperative diversity in wireless networks: Efficient protocols and outage behavior , 2004, IEEE Transactions on Information Theory.

[11]  Zhengyuan Xu.  On the second-order statistics of the weighted sample covariance matrix , 2003, IEEE Trans. Signal Process..

[12]  Ying-Chang Liang,et al.  Channel Estimation for OFDM Modulated Two-Way Relay Networks , 2009, IEEE Transactions on Signal Processing.