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2010•Journal of AstronauticsRequires access

Maximum Ratio Combining Based Maximum Likelihood TDOA/FDOA Joint Localization

Yubing Han

Open publisher page 1 citations

Abstract

To improve location precision of time difference of arrival(TDOA) or frequency difference of arrival(FDOA),a joint maximum likelihood(ML) localization of TDOA and FDOA based on maximum ratio combining(MRC) was proposed and the combining factors of MRC were determined by the inverses of Fisher information matrices of TDOA and FDOA location.From simulation and theory analysis,it follows: this algorithm performs better than both TDOA and FDOA,and achieves the Cramer-Rao Lower Bound(CRLB)regardless of earth constraint(EC).

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What this paper is about

To improve location precision of time difference of arrival(TDOA) or frequency difference of arrival(FDOA),a joint maximum likelihood(ML) localization of TDOA and FDOA based on maximum ratio combining(MRC) was proposed and the combining factors of MRC were determined by the inverses of Fisher information matrices of TDOA and FDOA location.From simulation and theory analysis,it follows: this algorithm performs better than both TDOA and FDOA,and achieves the Cramer-Rao Lower Bound(CRLB)regardless of earth constraint(EC).

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Available abstract

To improve location precision of time difference of arrival(TDOA) or frequency difference of arrival(FDOA),a joint maximum likelihood(ML) localization of TDOA and FDOA based on maximum ratio combining(MRC) was proposed and the combining factors of MRC were determined by the inverses of Fisher information matrices of TDOA and FDOA location.From simulation and theory analysis,it follows: this algorithm performs better than both TDOA and FDOA,and achieves the Cramer-Rao Lower Bound(CRLB)regardless of earth constraint(EC).

Key concepts: FDOA, Multilateration, Cramér–Rao bound, Upper and lower bounds, Constraint (computer-aided design), Statistics, Mathematics, Algorithm

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