Symbol timing estimation in multiband OFDM based ultrawide band system

Author

Suresh, M.N. ; Mouli, D.C. ; Prasath, M.G. ; Abhaikumar, V. ; Thiruvengadam, S.J.

Author_Institution

Dept. of ECE, Thiagarajar Coll. of Eng., Madurai, India

fYear

2010

fDate

18-21 July 2010

Firstpage

1

Lastpage

4

Abstract

This paper proposes a novel symbol timing estimation technique for multiband orthogonal frequency division multiplexing (MB-OFDM) based ultra wideband system. The symbol timing is estimated in two steps namely, coarse synchronization and fine synchronization. The coarse synchronization is obtained using the correlation between adjacent symbols. A new algorithm is proposed using maximum likelihood concept for achieving fine synchronization. The proposed algorithm overcomes the problem of delayed significant multipath component and exploits inherent frequency diversity in MB-OFDM. The mean square error (MSE) performance of the proposed technique is analyzed using MATLAB simulations for UWB channel models proposed by IEEE 802.15.3a working group for UWB systems. It is proved that the proposed technique has better MSE performance compared to the existing algorithms.

Keywords

OFDM modulation; maximum likelihood estimation; mean square error methods; multipath channels; timing; ultra wideband communication; MATLAB simulations; UWB channel models; coarse synchronization; fine synchronization; frequency diversity; maximum likelihood concept; mean square error; multiband orthogonal frequency division multiplexing; symbol timing estimation technique; ultrawide band system; Estimation; OFDM; Signal processing algorithms; Synchronization; Training; Multiband OFDM; UWB channel models; symbol timing estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications (SPCOM), 2010 International Conference on

Conference_Location

Bangalore

Print_ISBN

978-1-4244-7137-9

Type

conf

DOI

10.1109/SPCOM.2010.5560501

Filename

5560501