Title :
Robust Tomlinson-Harashima precoding with Kalman channel tracking in MIMO systems
Author :
Wan-Yu Ting ; Feng-Tsun Chien
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
The multiple-input multiple-output (MIMO) Tomlinson-Harashima precoder (THP) is an equalization structure for mitigating inter-stream interference in fading MIMO systems. It is well known that THP is optimal with perfect channel state information (CSI) at both transmitter and receiver. However, this assumption is not achievable in real world. In this work, under the assumption of partial channel state information (P-CSI), we show that the THP precoded MIMO system with Kalman (THP-Kalman) channel tracking outperforms that with linear minimum mean-square-error (LMMSE) estimator (THP-LMMSE) when operating in time-division-duplex (TDD) mode. Also, THP-Kalman exhibits robust error performance in fast fading, while THP-LMMSE is more sensitive to the varying rate of channel.
Keywords :
Kalman filters; MIMO communication; channel coding; equalisers; fading channels; interference suppression; least mean squares methods; precoding; time division multiplexing; Kalman channel tracking; LMMSE; P-CSI; TDD; THP; equalization structure; fading MIMO systems; inter-stream interference mitigation; linear minimum mean-square-error estimator; multiple-input multiple-output precoder; partial channel state information; perfect channel state information; receiver; robust Tomlinson-Harashima precoding; time-division-duplex mode; transmitter; Kalman filters; MIMO; Optimization; Receivers; Transmitting antennas; Uplink; Kalman filter; MIMO; Tomlinson-Harashima precoding; multichannel tracking;
Conference_Titel :
Information, Communications and Signal Processing (ICICS) 2013 9th International Conference on
Conference_Location :
Tainan
Print_ISBN :
978-1-4799-0433-4
DOI :
10.1109/ICICS.2013.6782944
