Frequency offset estimation for MB-OFDM-based UWB systems

Author

Li, Yinghui ; Minn, Hlaing ; Jacobs, Trent ; Win, Moe Z.

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX

Volume

56

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

968

Lastpage

979

Abstract

We address low-complexity, highly-accurate frequency offset estimation for multi-band orthogonal frequency division multiplexing (MB-OFDM) based ultra-wide band systems in time-invariant as well as time-variant channels. We investigate the unique characteristics of MB-OFDM systems, namely, different frequency offsets, channel responses, received energies, and preamble structures in different frequency bands. Utilizing them, we develop frequency offset estimators based on the best linear unbiased estimation principle. If compared to the reference estimators, our proposed methods achieve significantly better estimation performance (4 to 6.4 dB (5 to 20 dB) estimation mean-square error advantage in the time-invariant (time-variant) channels) for all preamble patterns of the MB-OFDM system in [8].

Keywords

OFDM modulation; frequency estimation; time-varying channels; ultra wideband communication; wireless channels; MB-OFDM-based UWB systems; channel responses; frequency offset estimation; linear unbiased estimation principle; multiband orthogonal frequency division multiplexing; preamble structures; time-invariant channels; time-variant channels; ultra-wide band systems; Bandwidth; Computer aided manufacturing; Degradation; Estimation error; Frequency diversity; Frequency estimation; Frequency synchronization; Jacobian matrices; OFDM; Scattering;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2008.060343

Filename

4542752