Passive sensor error registering method and apparatus based on maximum likelihood estimation

A technology of maximum likelihood estimation and passive sensors, applied in the field of measurement, can solve the problems of not fully considering the influence of sensor system errors on positioning results, inaccurate measurement results, etc.

Inactive Publication Date: 2016-11-30
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

[0007] Although passive sensor positioning is more accurate, the existing methods do not fully consider the influence of the systematic error between sensors on the positioning results, resulting in inaccurate measurement results

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  • Passive sensor error registering method and apparatus based on maximum likelihood estimation
  • Passive sensor error registering method and apparatus based on maximum likelihood estimation
  • Passive sensor error registering method and apparatus based on maximum likelihood estimation

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Embodiment Construction

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The error registration method for passive sensors based on maximum likelihood estimation provided in this embodiment includes:

[0055] S1: Obtain the coordinates (x(k), y(k)) of the observed point at time k, the azimuth measurement value θ(k) between the observed point and the observed point, and the corresponding random measurement d...

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Abstract

The invention provides a passive sensor error registering method and apparatus based on maximum likelihood estimation. When an observed point is positioned, coordinates of the observed point and three observation points under the same coordinate system, azimuth measurement values between the observation points and the observed point and random measurement deviations are obtained. By use of the maximum likelihood estimation and a Gauss-Newton method, system deviations and random deviations in an observation process are processed, and positioning results satisfying precision requirements are obtained by use of an iteration method. Compared to a positioning method in the prior art, the method brought forward by the invention takes system deviations between the observation points into consideration and improves the positioning precision of a passive sensor.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a method and device for error registration of passive sensors based on maximum likelihood estimation. Background technique [0002] Active radar uses electromagnetic waves to find targets and detect their positions. It is characterized by high positioning accuracy, but the disadvantage is that it is easily detected by enemy reconnaissance equipment and is attacked by electronic interference and anti-radiation missiles. The passive radar itself does not emit electromagnetic waves, but only passively receives the information carried by the reflected or scattered waves from the target radiation source or external radiation source after the target is irradiated by the antenna, and completes the target detection after information processing and data processing. positioning or tracking. [0003] There are many methods for the passive radar system to achieve target posi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 董云龙李保珠邢厚刚孙璐周伟
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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