Title :
Centralized and Decentralized Channel Estimation for Multiuser MIMO-OFDM Systems
Author :
Yang, Qinghai ; Zhu, Huamin ; Xu, Shaoyi ; Kwak, Kyung Sup
Author_Institution :
Graduate Sch. of Inf. Technol. & Telecommun., Inha Univ., Incheon
Abstract :
This paper addresses pilot-aided multiuser least square (LS) channel estimation for the uplink of MIMO-OFDM systems. The systems under consideration allow all users use all available subcarriers independently and thus involve multiuser interference in the frequency domain. We develop the decentralized and centralized channel estimation algorithms according to different multiuser scenarios. Optimal multiuser pilots are proposed specially for centralized estimation methods with respect to the mean square error (MSE) of LS channel estimate
Keywords :
MIMO systems; OFDM modulation; channel estimation; frequency-domain analysis; least mean squares methods; multiuser channels; centralized channel estimation; decentralized channel estimation method; frequency domain; mean square error; multiple input multiple output system; multiuser MIMO-OFDM system; multiuser interference; orthogonal frequency division multiplexing; pilot-aided least square channel estimation; Channel estimation; Frequency domain analysis; Interference; Least squares approximation; MIMO; Mean square error methods; OFDM; Receiving antennas; Transmitting antennas; Wireless communication;
Conference_Titel :
Communications, 2006. APCC '06. Asia-Pacific Conference on
Conference_Location :
Busan
Print_ISBN :
1-4244-0574-2
Electronic_ISBN :
1-4244-0574-2
DOI :
10.1109/APCC.2006.255790
