單觀測器無源定位誤差下界的仿真分析
Simulating analysis on estimation error lower bound for single passive observer
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摘要: 單觀測器無源定位所能達到的最優(yōu)定位精度與觀測器的運動速度、運動軌跡、測量精度和測量速率密切相關(guān)。該文采用仿真方法，分析了觀測器運動軌跡、運動速度、測量精度和測量速率等因素對測角無源定位誤差Cramer-Rao下界的影響，比較了三種形式觀測器軌跡的定位誤差下界，得出的結(jié)果對確定具體定位與跟蹤系統(tǒng)戰(zhàn)術(shù)指標(biāo)、以及對濾波算法的選用具有實用價值。
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關(guān)鍵詞:
- 無源定位; 定位誤差分析; CRLB（Cramer-Rao Lower Bound）
Abstract: At certain measurement rate and error, the best estimation accuracy which may be achieved by single passive observer is decided by the velocity and trajectory and trajectory of the observer, independent of the estimation algorithm. In this paper, simulation experiments show the effects of measurement rate, error and observer velocity, trajectory on the error Cramer-Rao lower bounds of position estimate under two kinds of observer trajectories. Then the best Cramer-Rao lower bounds of three kinds of observer trajectories are compared. The experimental results are very useful for design of passive target tracking system. -
H.L. Van Trees, Detection, Estimation and Modulation Theory, Part I, New York, Wiley, 1968.66-72.[2]J.H. Taylor, The Cramer-Rao estimation lower bound computation for deterministic nonlinear systems, IEEE Trans. on Automatic Control, 1979, AC-24(2), 342-344.[3]S.E. Hammel, P. T. Liu, Optimal observer motion for localization with bearings measurements.Computers Math. Appl., 1989, 18(1-3), 171-180.[4]J.M. Passerieux, D. Van Cappel, Optimal observer maneuver for bearings-only tracking, IEEE Trans. on Aerosp. Electron. Syst., 1998, AES-34(3), 777-788.[5]鄧新蒲,周一宇,無源定位的觀測平臺自適應(yīng)運動分析,電子學(xué)報,2001,29(3),311-314. -
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