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Passive radar target positioning method and device

A technology of target positioning and passive radar, which is applied in measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve the problem of low accuracy in estimating the target position, and achieve the effect of ensuring convergence

Active Publication Date: 2018-11-06
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0005] The purpose of the present invention is to provide a passive radar target positioning method and device, which is used to solve the problem of low precision of the target position estimated by the existing passive radar target positioning method

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  • Passive radar target positioning method and device
  • Passive radar target positioning method and device

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Embodiment Construction

[0028] The specific embodiments of the present invention will be further described below in conjunction with the drawings.

[0029] The present invention provides a passive radar target positioning method, which includes the following steps:

[0030] 1) Construct the observation equation of angle and time difference, and linearize the observation equation of angle and time difference to obtain the linear equation, and solve the linear equation to obtain the initial estimated value of the target position.

[0031] 2) The angle measurement value is expressed as the difference between the true angle value and the angle observation error, the time difference measurement value is expressed as the difference between the real time difference and the time difference observation error, and the measured position value of the external radiation source is expressed as the true position of the external radiation source The difference between the value and the position measurement error, the measu...

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Abstract

The invention relates to a passive radar target positioning method and device. The method comprises steps of linearizing an observation equation of angle and time difference to obtain a set of linearequations, obtaining rough estimation of a target position by using least squares, considering the observation error and the position error of the external radiation source in the linear equations toobtain a constrained total least squares model, taking a least squares solution obtained as an initial solution, and using the Newton iteration to obtain the accurate estimation of the target position. The invention considers the angle observation error, the time difference observation error and the position error of the external radiation source, the positioning result is the optimal estimation result when the external radiation source has an error, and the nonlinear angle and time difference observation equation is linearized to obtain the least squares algebraic solution as the initial solution of the Newton iteration to ensure the convergence of the algorithm.

Description

Technical field [0001] The invention belongs to the technical field of passive radar target positioning, and specifically relates to a passive radar target positioning method and device. Background technique [0002] Passive radar, as a special bistatic radar, does not radiate electromagnetic waves by itself, but detects and locates targets by receiving and processing the reflection or scattering signals of the target to the existing external radiation sources in the environment. This special working principle enables it to have good four resistances (electronic interference, anti-radiation weapon attack, stealth target attack, low-altitude and ultra-low-altitude penetration) characteristics compared to traditional active radars. Therefore, passive radar technology has attracted much attention in the international radar field for many years. [0003] The location information of the external radiation source is a necessary parameter for passive radar target positioning. However, f...

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Application Information

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IPC IPC(8): G01S7/02G01S13/06
CPCG01S7/02G01S13/06
Inventor 胡德秀赵勇胜赵拥军刘智鑫赵闯赵泽亚张睿黄东华
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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