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

fYear

2006

fDate

Aug. 2006

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APCC.2006.255790

Filename

4023095