On coded pilot based channel estimation for OFDM in very fast multipath fading channel

Author

Ng, Wee Teck ; Dubey, Vimal K.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

2

fYear

2003

fDate

15-18 Dec. 2003

Firstpage

859

Abstract

This paper proposes a novel channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) system based on comb-type of coded clusters of pilots. It is not only able to estimate the channel response due to immediate subcarriers, but also the amount of inter-carrier-interference (ICI) from other subcarriers. The algorithm is suitable for OFDM system in very fast time varying channel, where ICI is significant. The criteria for selecting the optimum coded pilot sequence for each of the cluster is also presented. The mean square error (MSE) of the estimate using the proposed algorithm is also derived. The simulation results clearly show that the proposed algorithm outperforms the conventional channel estimation algorithm.

Keywords

OFDM modulation; Rayleigh channels; channel estimation; mean square error methods; multipath channels; time-varying channels; ICI; MSE; OFDM system; channel estimation algorithm; inter-carrier-interference; mean square error; optimum coded pilot sequence; orthogonal frequency division multiplexing; time varying channel; Bandwidth; Channel estimation; Clustering algorithms; Equalizers; Fading; Frequency division multiplexing; Interference; Multipath channels; OFDM; Partial transmit sequences;

fLanguage

English

Publisher

ieee

Conference_Titel

Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on

Print_ISBN

0-7803-8185-8

Type

conf

DOI

10.1109/ICICS.2003.1292579

Filename

1292579