Passive Range-Difference Estimation in a Dispersive Medium

Author

Chan, Y.T. ; Lo, Thomas K C ; So, H.C.

Author_Institution

Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, ON, Canada

Volume

58

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

1433

Lastpage

1439

Abstract

Passive source localization can be achieved by utilizing the range-difference (RD) measurements between the source and several spatially separated sensors. When the signal propagation medium is nondispersive, the RD is typically obtained from time-difference-of-arrival (TDOA) between sensor outputs. However, for a dispersive medium which corresponds to in-solid localization, the TDOA information is not reliable. In this correspondence, two RD estimation algorithms for dispersive medium are derived and analyzed, assuming that the dispersion curve is available. Computer simulations are included to contrast the estimation performance of the two methods with the Cramer-Rao lower bound (CRLB) for different conditions.

Keywords

dispersive media; estimation theory; signal processing; time-of-arrival estimation; Cramer-Rao lower bound; dispersive medium; passive range-difference estimation; passive source localization; signal propagation medium; time-difference-of-arrival; Dispersive medium; range-difference (RD) estimation; source localization; time-difference-of-arrival (TDOA) estimation;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2009.2035987

Filename

5313936