A New Method of Passive Location Tracking Based on Logarithmic Likelihood Estimation

A logarithmic likelihood estimation and passive positioning technology, applied in the field of passive positioning and tracking based on logarithmic likelihood estimation, can solve the problems of converging on the local solution calculation amount and iterative operation iterative divergence, etc.

Active Publication Date: 2019-11-19
XIJING UNIV
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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a new method of passive location tracking based on logarithmic likelihood estimation, which solves the problem of iterative divergence and convergence to local solutions in the traditional passive location tracking method. and the problem of large amount of computation

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  • A New Method of Passive Location Tracking Based on Logarithmic Likelihood Estimation
  • A New Method of Passive Location Tracking Based on Logarithmic Likelihood Estimation
  • A New Method of Passive Location Tracking Based on Logarithmic Likelihood Estimation

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Embodiment

[0244] In order to verify the feasibility of the algorithm, we make the following three kinds of simulation analysis.

[0245] The first one: set the target to move with uniform acceleration on the plane, the initial coordinate is at the origin, and the initial velocity v 0 =2m / s, acceleration a 0= 0.2m / s2. The angle measurement error follows a Gaussian distribution with a mean of 0 and a variance of 0.001o. In the simulation, take T=1s, the maneuvering constant is 10, and the positions of the two observation stations are o 1 (0,50), o 2 (0,100). Figure (1) shows the tracking curve results, Figure (2) shows the velocity estimation results, and Figure (3) shows the acceleration estimation results. It can be seen from the figure that the estimated values ​​of position, velocity and acceleration are very close to the theoretical values. The root mean square error of position is 0.032, the root mean square error of velocity is 0.0897, and the root mean square error of accele...

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Abstract

The invention relates to a log likelihood estimation based novel passive locating and tracking method. A multistation angle-measurement passive-location non-linear measurement equation is subjected to pseudo-linearization processing by the aid of log likelihood estimation, target position is obtained by means of maximum likelihood estimation, a closed-form solution of a target locating algorithm is given, then a 'current' statistical maneuver model and Kalman filtering are utilized to calculate target position, velocity and acceleration online in real time, and real-time accurate positioning and tracking on the target is realized.

Description

technical field [0001] The invention relates to the field of automatic control and information technology, and can be used for real-time positioning and tracking of highly maneuverable moving targets in military and civilian fields, in particular to a new passive positioning and tracking method based on logarithmic likelihood estimation. Background technique [0002] Passive positioning technology is a technology in which the positioning device itself does not emit signals, but only relies on passively receiving information from radiation sources to achieve positioning. It can use the radiation information of a radiation source at an unknown location to determine the type, space and geographic location of the radiation source; or use a radiation source with a known geographic location to determine the space and geographic location of an object in navigation, which is also a navigation and guidance An important technical means in positioning. Compared with active positioning...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘哲黄世奇王利平
Owner XIJING UNIV
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