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Title: Optimal training sequences for channel estimation in bi-directional relay networks with multiple antennas
Authors: Pham, T.-H. 
Liang, Y.-C.
Nallanathan, A.
Garg, H.K. 
Keywords: Bi-directional relay networks
Channel estimation
Training signal design
Zadoff-Chu sequences
Issue Date: Feb-2010
Citation: Pham, T.-H., Liang, Y.-C., Nallanathan, A., Garg, H.K. (2010-02). Optimal training sequences for channel estimation in bi-directional relay networks with multiple antennas. IEEE Transactions on Communications 58 (2) : 474-479. ScholarBank@NUS Repository.
Abstract: In this letter, we consider a bi-directional relay network in which two users, U1 and U2, exchange their information via a relay station, RS. Multiple antennas are deployed at both users and at RS. Single carrier cyclic prefix (SCCP) is used to combat intersymbol interference (ISI) in frequency-selective fading channels. The transmission process is divided into two time slots. At the first time slot, both users send their information to RS concurrently. RS then amplifies and broadcasts its received signals at the second time slot. We propose an algorithm to estimate the channel information at end users based on the leastsquare (LS) principle. To further minimize the mean square error (MSE) of the estimate, a method to design the optimal training sequences is also proposed. Simulation results show that the performance achieved by our optimal design is close to that with perfect channel information. © 2006 IEEE.
Source Title: IEEE Transactions on Communications
ISSN: 00906778
DOI: 10.1109/TCOMM.2010.02.080431
Appears in Collections:Staff Publications

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