Channel Estimation for OFDM-based Cellular Systems using a DEM Algorithm

Author

Lee, Kyu In ; Woo, Kyung Soo ; Kim, Jaekwon ; Yi, Joohyun ; Yun, Sangboh ; Cho, Yong Soo

Author_Institution

Chung-Ang Univ., Seoul

fYear

2007

fDate

3-7 Sept. 2007

Firstpage

1

Lastpage

5

Abstract

In this paper, a decision-directed expectation maximization (DEM) algorithm is proposed to improve the performance of channel estimation in OFDM-based cellular systems. The DEM algorithm enables a mobile station (MS) with multiple antennas, located at the cell boundary, to increase the performance of channel estimation using transmit data, without decreasing spectral efficiency. Compared with the expectation maximization (EM) algorithm, the DEM algorithm can greatly reduce computational complexity while improving the performance of channel estimation in fast fading channels.

Keywords

OFDM modulation; antenna arrays; cellular radio; channel estimation; expectation-maximisation algorithm; fading channels; DEM algorithm; OFDM-based cellular systems; channel estimation; decision-directed expectation maximization; expectation maximization algorithm; fading channels; mobile station; multiple antennas; Channel estimation; Computational complexity; Fading; Interference cancellation; Land mobile radio; Maximum likelihood detection; Maximum likelihood estimation; Mobile communication; OFDM; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on

Conference_Location

Athens

Print_ISBN

978-1-4244-1144-3

Electronic_ISBN

978-1-4244-1144-3

Type

conf

DOI

10.1109/PIMRC.2007.4394468

Filename

4394468