Title :
BEM-Based Estimation for Time-Varying Channels and Training Design in Two-Way Relay Networks
Author :
Wang, Gongpu ; Gao, Feifei ; Tellambura, Chintha
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada
Abstract :
In this paper, channel estimation for two-way relay networks (TWRNs) over time-varying channels is investigated. We consider the amplify-and-forward (AF) relaying scheme and adopt the complex-exponential basis expansion model (CE-BEM) that represents the time-varying channel by a finite number of parameters. We develop the estimation methods for both the cascaded channels and the individual channels and also apply the total least square (TLS) algorithm to improve the estimation accuracy. Moreover, the training design is discussed and a heuristic criterion is proposed to minimize the condition number of the estimation matrix. The simulation results verify the goodness of the criterion.
Keywords :
amplify and forward communication; channel estimation; least squares approximations; time-varying channels; BEM-based estimation; amplify-and-forward relaying scheme; cascaded channels; channel estimation; complex-exponential basis expansion model; heuristic criterion; individual channels; time-varying channels; total least square algorithm; training design; two-way relay networks; Channel estimation; Estimation; Noise; OFDM; Peer to peer computing; Relays; Training;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE
Conference_Location :
Miami, FL
Print_ISBN :
978-1-4244-5636-9
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2010.5683403
