Paper: | SAM-P7.3 | ||

Session: | Applications of Multichannel Signal Processing | ||

Time: | Thursday, May 20, 13:00 - 15:00 | ||

Presentation: | Poster | ||

Topic: | Sensor Array and Multichannel Signal Processing: Source localization, separation, classification, and tracking | ||

Title: | GEOLOCATION BY TIME DIFFERENCE OF ARRIVAL USING HYPERBOLIC ASYMPTOTES | ||

Authors: | Samuel Drake; Defence Science & Technology Organisation (DSTO) | ||

Kutluyil Doğançay; University of South Australia | |||

Abstract: | The paper proposes a new simplified algorithm to estimate the location of an emitter by utilizing time difference of arrival (TDOA) measurements. This is achieved by recasting the estimation problem in prolate spheroidal coordinates. Prolate spheroidal coordinates greatly simplify the TDOA equations, producing a set of linear equations in the far field limit. The set of linear equations corresponds to the hyperbolic asymptotes of the TDOA measurements. We also develop a systematic approach that associates the hyperbolic asymptotes with the emitter. In the near field the far-field solution can be used to ``seed'' the iterative maximum likelihood (ML) estimate, guaranteeing convergence to the ML solution. | ||

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