Joint frequency offset and channel estimation methods for two-way relay networks

Authors:
Gongpu Wang;Feifei Gao;Chintha Tellambura
Affiliations:
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada;School of Engineering and Science, Jacobs University, Bremen, Germany;Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 2
Cited 1

Hot topic: physical-layer network coding

Proceedings of the 12th annual international conference on Mobile computing and networking
Channel estimation for OFDM modulated two-way relay networks

IEEE Transactions on Signal Processing

Optimal Timing at the Relay in OFDM Based Two Way Relay Systems

Wireless Personal Communications: An International Journal

Quantified Score

Hi-index	0.00

Visualization

Abstract

In this paper, we study the problem of joint carrier frequency offset (CFO) and channel estimation for two-way relay network (TWRN) that comprises two source terminals and one relay node. We build up the signal model, from which we identify the CFO and channels at the two source terminals. As the very first attempt to discuss the joint CFO and the channel estimation for TWRN, we consider relay node that purely amplifies and forwards, which is also known as the repeater. The new model is different from the traditional ones in that the unknown CFO is combined with only part of the channel parameters. We then propose two joint estimation methods, i.e., the approximate maximum-likelihood (ML) method and the nulling-based method. The Cramér-Rao Bounds (CRB) of both methods are derived in closed-form. Simulations are then provided to corroborate the proposed studies.