Radiation source time difference positioning method having passive detection observation station position error

A passive detection and time difference positioning technology, applied in the field of communication, can solve problems such as limiting the efficiency of radiation source position estimation, not considering position error, and unsatisfactory radiation source position estimation accuracy, so as to improve estimation efficiency, overcome performance limitations, and improve Effect of Estimation Accuracy

Active Publication Date: 2016-09-21
XIDIAN UNIV
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Problems solved by technology

However, the disadvantage of this method is that due to the use of pseudo-linear equations that introduce auxiliary variables, additional steps are required to extract the radiation source position from the additional auxiliary variables, which limits the estimation efficiency of the radiation source position
In addition, because the position error existing in the movement of the passive detection observation station is not considered, the position estimation accuracy of the radiation source is not ideal when there is a position error in the passive detection observation station

Method used

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  • Radiation source time difference positioning method having passive detection observation station position error
  • Radiation source time difference positioning method having passive detection observation station position error
  • Radiation source time difference positioning method having passive detection observation station position error

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Embodiment Construction

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Refer to the attached figure 1 , the specific steps of the present invention are as follows.

[0034] Step 1, extract the time difference.

[0035] Each passive detection observation station intercepts the signal propagated by the radiation source, measures the time when the signal propagated by the radiation source arrives at the respective position of the passive detection observation station, and obtains the arrival time.

[0036] Any passive detection observation station receives the time when the signal propagated by the radiation source forwarded by other passive detection observation stations arrives at the respective positions of the passive detection observation station, forming the arrival time vector.

[0037] Constructs an extraction matrix of time-difference vectors.

[0038] The extraction matrix of the time difference vector is constructed accord...

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Abstract

The invention discloses a radiation source time difference positioning method having a passive detection observation station position error. The radiation source time difference positioning method is characterized in that (1) a time difference is extracted; (2) a time difference positioning direct linear equation system is constructed; (3) a linear mapping matrix of a passive detection observation station position error disturbance is constructed; (4) a linear mapping matrix of a time difference measurement error disturbance is constructed; (5) a linear mapping matrix of an error disturbance is constructed; (6) a radiation source position is estimated. A time difference positioning direct linear model is adopted, and the position error of the passive detection observation station is considered, and the radiation source time difference positioning method is used for the radiation source passive positioning of the passive detection observation station.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to the time difference positioning of radiation sources when a passive detection observation station has a position error in the technical field of passive positioning. The invention can be used for passive positioning of radiation sources by moving platforms such as aircraft, satellites, and unmanned aerial vehicles. Background technique [0002] Passive positioning of radiation sources is widely used in aircraft, satellites, and drones. The modern passive positioning system always places the passive detection and observation station on the moving platform whose position is uncertain, which leads to the position error of the passive detection and observation station. The small position error of the passive detection station will lead to a large radiation source position estimation error. Therefore, the radiation source position estimation method considering the positio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16
CPCG01S5/16
Inventor 董春曦朱颖童董阳阳赵国庆饶鲜许锦唐峥钊刘明明
Owner XIDIAN UNIV
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