Optimal Training Sequences for Channel Estimation in Bi-Directional Relay Networks with Multiple Antennas

The-Hanh Pham; Ying-Chang Liang; A. Nallanathan; Hari Krishna Garg

doi:10.1109/TCOMM.2010.02.080431

Optimal Training Sequences for Channel Estimation in Bi-Directional Relay Networks with Multiple Antennas

The-Hanh Pham, Ying-Chang Liang, A. Nallanathan, Hari Krishna Garg

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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 least-square (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.

Original language	English
Article number	5407613
Pages (from-to)	474 - 479
Number of pages	6
Journal	IEEE TRANSACTIONS ON COMMUNICATIONS
Volume	58
Issue number	2
DOIs	https://doi.org/10.1109/TCOMM.2010.02.080431
Publication status	Published - Feb 2010

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AU - Garg, Hari Krishna

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Optimal Training Sequences for Channel Estimation in Bi-Directional Relay Networks with Multiple Antennas

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