Bounds on distributed TDOA-based localization of OFDM sources

Author

Martin, Richard K. ; Yan, Chunpeng ; Fan, H.Howard

Author_Institution

Dept. of Elec. & Comp. Eng., Air Force Inst. of Technol., Wright-Patterson AFB, OH

fYear

2009

fDate

19-24 April 2009

Firstpage

2289

Lastpage

2292

Abstract

One main drawback of using time difference of arrival (TDOA) methods for source localization and navigation is that they require centralization of multiple copies of a signal. This paper considers blindly estimating the location of a cyclic prefix (CP) in an orthogonal frequency division multiplexing (OFDM) signal, enabling distributed TDOA computation up to an integer ambiguity. This ambiguity can be resolved using integer least-squares methods, if enough TDOAs are available. The contributions of this paper are derivation of the Cramer-Rao lower bound (CRLB) on locating the CP, and hence on the underlying source localization problem.

Keywords

OFDM modulation; direction-of-arrival estimation; least squares approximations; signal sources; Cramer-Rao lower bound; OFDM sources; blind cyclic prefix location estimation; distributed TDOA-based localization; integer ambiguity; integer least-squares methods; orthogonal frequency division multiplexing signal; source localization; source navigation; time difference of arrival methods; Bandwidth; Delay effects; Delay estimation; Frequency estimation; Maximum likelihood estimation; Navigation; OFDM; Pulse shaping methods; Signal resolution; Signal to noise ratio; Cramer-Rao lower bound; OFDM; TDOA; blind; cyclic prefix; time delay estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on

Conference_Location

Taipei

ISSN

1520-6149

Print_ISBN

978-1-4244-2353-8

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2009.4960077

Filename

4960077