Pilot-aided channel estimation for multiuser MIMO-OFDM systems

Author

Yang, Qinghai ; Xu, Shaoyi ; Lim, Jong Kyoung ; Kwak, Kyung Sup

Author_Institution

Graduate Sch. of Inf. Technol. & Telecommun., Inha Univ., Inchon, South Korea

Volume

2

fYear

2005

fDate

12-14 Oct. 2005

Firstpage

1005

Lastpage

1008

Abstract

This paper addresses a pilot aided maximum likelihood (ML) channel estimation scheme for the uplink of multiuser multiple-input multiple-out (MIMO) orthogonal frequency division multiplexing (OFDM) systems. We derive the optimal pilot symbols and develop the optimal placement of pilot tones with respect to the mean square error (MSE) of channel estimate. In addition, a gradient algorithm for channel tracking is proposed to enhance the channel estimation.

Keywords

MIMO systems; OFDM modulation; channel estimation; gradient methods; maximum likelihood estimation; mean square error methods; multiuser channels; radio links; channel tracking; gradient algorithm; mean square error; multiple-input multiple-out orthogonal frequency division multiplexing; multiuser MIMO-OFDM systems; optimal pilot symbols; pilot aided maximum likelihood channel estimation; AWGN; Base stations; Channel estimation; MIMO; Maximum likelihood detection; Maximum likelihood estimation; Mean square error methods; OFDM; Receiving antennas; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on

Print_ISBN

0-7803-9538-7

Type

conf

DOI

10.1109/ISCIT.2005.1567037

Filename

1567037