SISO-OFDM channel estimation in the presence of carrier frequency offset

Author

Weng, Lingfan ; Murch, Ross D. ; Lau, Vincent K N

Author_Institution

Center for Wireless Inf. Technol., Hong Kong Univ. of Sci. & Technol., Kowloon

Volume

3

fYear

2006

fDate

3-6 April 2006

Firstpage

1444

Lastpage

1449

Abstract

In this paper, we consider the effect of CFO (carrier frequency offset) on the performances of LS (least square) and LMMSE (linear minimum mean square error) channel estimation algorithms for SISO (single input single output) OFDM (orthogonal frequency division multiplexing) systems. Compact analytical expressions on the MSE (mean square error) of the channel estimation under the effect of CFO are derived, while conventional works mainly rely on Cramer-Rao bound or Monte Carlo simulations. Based on the expressions derived, it is observed that the MSE contributed by CFO increases at the rate about the square of CFO and it can not be reduced by using more training symbols. What is more, it is also found that LMMSE is more resistant to CFO compared to LS

Keywords

OFDM modulation; channel estimation; least mean squares methods; LMMSE; SISO-OFDM channel estimation; carrier frequency offset; channel estimation algorithms; least square algorithms; linear minimum mean square error; orthogonal frequency division multiplexing; single input single output systems; Channel estimation; Doppler shift; Frequency estimation; Information technology; Least squares approximation; Mean square error methods; OFDM modulation; Oscillators; Random variables; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

1-4244-0269-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2006.1696499

Filename

1696499