Passive location based on an accurate Doppler measurement by single satellite

In this paper, we focus on high-precision measurement of Doppler information to ensure high positioning accuracy in passive location. Recent studies in which signals are simulated with second order derivative of Doppler frequency have been derived for passive radar application, but can only reach low level of accuracy of Doppler information. This paper proposes an accurate measurement of Doppler information using third order Taylor expansion for the distance function. The paper first discusses theory of Passive Location using Doppler information acquired by one single satellite. Then discusses the improvement of the signal model and introduce a new algorithm of obtaining Doppler information. The advantage of the proposed approach is that it can acquire second order derivative of Doppler frequency to minimize measurement error. Especially under the condition of high carrier frequency, this approach therefore achieves higher measurement precision. Finally, simulations are performed to validate the proposed method.