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Improved debiased coordinate transform Kalman filtering method

A technology of Kalman filtering and coordinate conversion, which is applied in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., and can solve problems such as increasing tracking performance and observation distance.

Inactive Publication Date: 2015-09-23
CHONGQING UNIV
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Problems solved by technology

However, the tracking performance of the debiased coordinate transformation Kalman filter method will increase with the standard deviation of the azimuth and elevation angles and the increase of the observation distance.

Method used

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  • Improved debiased coordinate transform Kalman filtering method
  • Improved debiased coordinate transform Kalman filtering method
  • Improved debiased coordinate transform Kalman filtering method

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Embodiment Construction

[0069] In order to make the above features and advantages of the present invention more obvious and understandable, the following combination figure 1 The present invention will be further described in detail with specific embodiments.

[0070] First, the abbreviated comments related to this scheme will be introduced as follows:

[0071] DCMKF is the traditional debiased coordinate conversion Kalman filter;

[0072] IDCMKF is an improved debiased coordinate transformation Kalman filter (namely the present invention).

[0073] Secondly, relevant parameters related to this scheme will be introduced and described in detail as follows:

[0074] x, y, z are the real position of the target in the Cartesian coordinate system;

[0075] r, β, θ are the true position of the target in polar coordinates;

[0076] r m , β m , θ m are the measured values ​​(distance, pitch angle and azimuth angle) obtained by the observation platform in the polar coordinate system;

[0077] is the...

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Abstract

In order to solve a problem in a target tracking method that tracking performance increases along with increasing of an azimuth, a pitch angle and observation distance, the invention provides an improved debiased coordinate transform Kalman filtering method. The measured value is transformed by adopting a multiplicative unbiased transform method, transform measurement mean square deviation estimation is realized via a Kalman filtering prediction value, then a transform measurement mean square deviation value is obtained by introducing an unscented transform method, and finally accurate target tracking through radar is realized via a Kalman filtering algorithm.

Description

technical field [0001] The invention relates to the field of wireless sensor network and the field of space multi-target tracking, in particular to an improved debiased coordinate transformation Kalman filtering method. Background technique [0002] With the development of the information age and the continuous innovation and improvement of aerospace technology, the strategic position of space in the political, economic, military and other fields of various countries is increasing day by day. In modern military struggles, space information has become the core combat capability, and it is very important to master space information. In order to better grasp space information, and with the development of satellite technology and radar technology, a new type of space-based radar has been developed to detect and track space targets. In order to more accurately identify and track space target information, in tracking radar The target tracking method must be introduced to update t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02G01S13/66
CPCG01S7/02G01S13/66
Inventor 廖勇何娟周昕许锦陈欢
Owner CHONGQING UNIV
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