2009•Systems engineering and electronicsRequires access

Analysis of precision of multi-satellite joint location based on TDOA/FDOA

Ma Qin

Abstract

Cramer-Rao lower bound(CRLB) is derived for multi-satellite passive location based on time difference of arrival(TDOA) and frequency difference of arrival(FDOA) and its necessary and sufficient conditions are given.These conditions can be used to design an optimal shape of satellite array.Compared with geometric dilution of precision(GDOP),CRLB can better evaluate the performance of joint passive location.Both theory analysis and simulation prove the fact that the joint TDOA/FDOA location performs better than any one of TDOA and FDOA.

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Key concepts: FDOA, Multilateration, Dilution of precision, Cramér–Rao bound, Upper and lower bounds, Computer science, Joint (building), Satellite