Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Log likelihood estimation based novel passive locating and tracking method

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: 2017-02-22
XIJING UNIV
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Log likelihood estimation based novel passive locating and tracking method
  • Log likelihood estimation based novel passive locating and tracking method
  • Log likelihood estimation based novel passive locating and tracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

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

[0245] The first type: Set the target to make a uniform acceleration movement on the plane, the starting coordinate is at the origin, and the starting speed v 0 = 2m / s, acceleration a 0 =0.2m / s2. The angle measurement error obeys a Gaussian distribution with a mean value of 0 and a variance of 0.001°. In the simulation, take T=1s, the maneuvering constant is 10, and the positions of the two observation stations o 1 (0,50), o 2 (0,100). Figure (1) shows the results of the tracking curve, Figure (2) shows the speed estimation results, and Figure (3) shows the acceleration estimation results. It can be seen from the figure that the estimated value of position, velocity and acceleration are very close to the theoretical value. 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 acceleration is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 the military and civilian fields, and specifically relates to a new passive positioning and tracking method based on log-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 the radiation source 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 objects in flight, which is also navigation and guidance An important technical means in positioning. Compared with active positioning te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘哲黄世奇王利平
Owner XIJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com