Direct geolocation of wideband emitters based on delay and doppler

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193 Scopus citations

Abstract

The localization of a stationary transmitter using receivers mounted on fast moving platforms is considered. It is assumed that the transmitted radio signal is random with known statistics. The conventional approach is based on two steps. In the first step the time difference of arrival and the differential Doppler shift are measured and in the second step these measurements are used for geolocation. We advocate a direct position determination approach that proves to be more computationally efficient and more precise for weak signals than the conventional approach. The direct method is a single-step method that uses the same signals as the two-step approach but searches directly for the emitter position without first estimating intermediate parameters such as Doppler frequency and the time delay. A secondary but important result is a derivation of closed-form and compact expressions of the Cramér-Rao lower bound. All results are verified by Monte Carlo computer simulations.

Original languageEnglish
Article number5730506
Pages (from-to)2513-2521
Number of pages9
JournalIEEE Transactions on Signal Processing
Volume59
Issue number6
DOIs
StatePublished - Jun 2011

Funding

FundersFunder number
Institute for Future Technologies Research named for the Medvedi, Shwartzman and Gensler Families
Israel Science Foundation218/08

    Keywords

    • Differential Doppler
    • emitter location
    • maximum likelihood estimation

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