Title :
Superimposed channel training for two-way MIMO relay systems
Author :
Chiong, Choo W. R. ; Yue Rong ; Yong Xiang
Author_Institution :
Dept. Electr. & Comput. Eng., Curtin Univ., Bentley, WA, Australia
Abstract :
Two-way relaying systems are known to be capable of providing higher spectral efficiency compared with one-way relaying systems. However, the channel estimation problem for two-way relaying systems becomes more complicated. In this paper, we propose a superimposed channel training scheme for two-way MIMO relay communication systems, where the individual channel information for users-relay and relay-users links are estimated. The optimal structure of the source and relay training sequences are derived when the mean-squared error (MSE) of channel estimation is minimized. We also optimize the power allocation between the source and relay training sequences to improve the performance of the algorithm. Numerical examples are shown to demonstrate the performance of the proposed channel training algorithm.
Keywords :
MIMO communication; channel estimation; mean square error methods; radio links; channel estimation; channel information; mean squared error; power allocation; relay training sequences; relay-users links; spectral efficiency; superimposed channel training; two-way MIMO relay systems; users-relay links; Channel estimation; Covariance matrix; MIMO; Nickel; Relays; Signal processing algorithms; Training; Channel estimation; MIMO relay; MMSE; superimposed training; two-way relay;
Conference_Titel :
Communication Systems (ICCS), 2012 IEEE International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-2052-8
DOI :
10.1109/ICCS.2012.6406101