New robust Taylor series method for target localisation based on external emitter radar

Abstract

This study addresses the target localisation problem using bistatic range (BR) measurements in a multi-base system based on external emitter radar. An asymptotically efficient Taylor series method is proposed for target localisation. The initial value for Taylor series method is provided by some algebraic closed-form positioning algorithms, rather than priori initial guesses. The localisation convergence problem can also be avoided unless in an extremely large measurement noise. The proposed method can be applied to both critically determined and over-determined conditions. The performance is verified and evaluated through simulations. The results show that the method can realise Cramer-Rao lower bound (CRLB) precision under Gaussian measurement noise. In addition, the method is superior to the existing localisation estimation in positioning accuracy and robustness.

Keywords

• target tracking
• maximum likelihood estimation
• radar signal processing
• series (mathematics)
• time-of-arrival estimation
• new robust Taylor series method
• external emitter radar
• target localisation problem
• bistatic range measurements
• multibase system
• asymptotically efficient Taylor series method
• initial value
• algebraic closed-form positioning algorithms
• priori initial guesses
• localisation convergence problem
• extremely large measurement noise
• Gaussian measurement noise
• existing localisation estimation