Sequential localization of a radiating source by Doppler-shifted frequency measurements

Author

Chan, Y.T. ; Towers, J.J.

Author_Institution

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

Volume

28

Issue

4

fYear

1992

fDate

10/1/1992 12:00:00 AM

Firstpage

1084

Lastpage

1090

Abstract

For a single omnidirectional sensor in contact with a constant velocity source that radiates a constant frequency tone, the measurements of the Doppler-shifted frequencies over time do not provide sufficient information to localize the source. Instead, only the parameters of source rest frequency, speed, and range relative to a sensor can be determined. However, if over time three or more sensors sequentially come in contact with the source, the source trajectory can then be specified. This is termed sequential localization. A two-dimensional grid search technique to find the Doppler parameters from measurements taken by a single sensor alone is presented. From these parameters, it is next shown how sequential localization is accomplished. Two simulation examples are provided to verify the development. The localization root mean squared errors (RMSEs) are found to be very close to the Cramer-Rao bound

Keywords

Doppler effect; frequency measurement; parameter estimation; signal detection; tracking; Cramer-Rao bound; Doppler-shifted frequency measurements; constant frequency tone; constant velocity source; omnidirectional sensor; projectile; radiating source; root mean squared errors; sequential localization; simulation; source trajectory; tracking; two-dimensional grid search; Computer errors; Frequency measurement; Geometry; Military computing; Nonlinear equations; Poles and towers; Projectiles; Sensor systems; Time measurement; Velocity measurement;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.165370

Filename

165370