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Radar target tracking method based on measurement conversion

A radar target tracking and measurement conversion technology, which is applied in measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation, and can solve problems such as sacrificing computational effort.

Inactive Publication Date: 2014-09-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Although the tracking accuracy of the algorithm has been improved, UT transformation calculation is used in the process of calculating the mean and covariance matrix based on the predicted value of the position in the Cartesian coordinate system, so a certain amount of calculation is sacrificed

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  • Radar target tracking method based on measurement conversion
  • Radar target tracking method based on measurement conversion
  • Radar target tracking method based on measurement conversion

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Embodiment Construction

[0080] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0081] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless specifically stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.

[0082] working principle:

[0083] In the spherical coordinate system, according to the relationship between the measured value and the true value of the target distance, azimuth and pitch angle, as well as the relationship between the predicted value and the true val...

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Abstract

The invention provides a radar target tracking method based on measurement conversion and relates to the field of the radar target tracking. The radar target tracking method mainly comprises three parts, namely the first part of obtaining a mean value and a covariance matrix of measurement conversion errors based on measurement values, the second part of obtaining the mean value and the covariance matrix of the measurement conversion errors based on predicted values in a spherical coordinate system, and obtaining parameters involved in the mean value and the covariance matrix by virtue of nonlinear transformation and Jacobian transformation matrix and by use of a predicted state and a prediction error covariance matrix which are estimated by a filter under a rectangular coordinate system, and the third part of selecting the mean value and the covariance matrix both relatively higher in accuracy from the mean values and the covariance matrices obtained in the first two parts as the final mean value and the final covariance matrix of the measurement conversion errors, carrying out a recursive filtering algorithm and realizing target tracking. In the target tracking, the method is high in tracking accuracy and fixed in operand, capable of better meeting the requirements of real-time processing and high in reliability.

Description

Technical field [0001] The invention belongs to the field of radar target tracking, and particularly relates to a calculation method for converting the statistical characteristics of measurement errors. Background technique [0002] At present, in the target tracking system, the state equation of the target is generally established in a rectangular coordinate system, and the measured value is generally obtained in a polar (spherical) coordinate system. In this way, target tracking becomes a nonlinear estimation problem. The common method to solve this problem is to convert the measurement Kalman filter (CMKF) algorithm, that is, use the conversion measurement method to transform the measurement in polar (spherical) coordinates into the measurement in the rectangular coordinate system, so that the target can be tracked. It becomes a linear estimation problem. However, the traditional conversion measurement method will produce deviations when converting the measurement (see liter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/66
CPCG01S7/41G01S13/723
Inventor 贾飞飞程婷赵霜叶苏洲阳向波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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