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Multi-station continuous positioning model based on TDOA/GROA (time different of arrival/gain ratio of arrival)

A technology of model and positioning method, applied in the field of multi-station continuous positioning model based on arrival gain ratio

Active Publication Date: 2017-01-25
NAVAL AVIATION UNIV
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Problems solved by technology

[0004] The above are the positioning algorithms based on the positioning model of intermediate variables. For the case of multiple moving stations, due to the continuous movement of the observation station, the intermediate variable, that is, the radial distance from the radiation source to the reference observation station is also changing, so that the above positioning The model and its algorithm cannot be directly extended to the continuous positioning of multiple moving stations, and a new positioning model needs to be established

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  • Multi-station continuous positioning model based on TDOA/GROA (time different of arrival/gain ratio of arrival)
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  • Multi-station continuous positioning model based on TDOA/GROA (time different of arrival/gain ratio of arrival)

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[0084] The present invention will be described in further detail below in conjunction with the accompanying drawings. Refer to the attached figure 1 , the multi-station continuous positioning method based on TDOA / GROA is divided into the following steps in the present invention:

[0085] Step 1: Let k=1, initialize the covariance matrix R

[0086] R=blkdiag(R rr , R gg )

[0087] where R rr and R gg are the covariance matrices of the RDOA measurement and the GROA measurement, respectively.

[0088] Step 2: Calculate the positioning model A based on TDOA and GORA measurement information and site information u (k)

[0089] A u (k)=[-A(k)b(k)]

[0090] A ( k ) = A t ...

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Abstract

The invention belongs to a multi-sensor passive positioning technology and provides a multi-station continuous positioning model based on TDOA / GROA (time different of arrival / gain ratio of arrival) for a fixed radiation source target. The limitation of an intermediate variable based traditional positioning model to a positioning scene is taken into consideration, and a positioning model only related to a target state vector is obtained by starting from measurement equations of TDOA and GROA, so that the introduction of an intermediate variable is avoided; an error term of the positioning model is deduced according to a measurement model, and target state estimation is calculated with a constrained weighted least squares algorithm finally. The positioning model is applicable to continuous positioning of the fixed radiation source target under a multi-sports-station scene.

Description

technical field [0001] The invention belongs to the multi-sensor passive positioning technology, relates to the problem of positioning radiation source targets by using measurement information such as the arrival gain ratio, and provides a multi-station continuous positioning model based on the arrival gain ratio. Background technique [0002] Passive positioning technology has always been an important research topic in the field of signal processing. It has the advantages of good concealment, long detection distance, and strong applicability. It has attracted extensive attention from domestic and foreign scholars in the fields of radar and wireless sensor networks. At present, the measurement information mainly used includes azimuth, time difference of arrival (TDOA), frequency difference of arrival, and gain ratio of arrival (GROA), etc., or various joint positioning systems obtained by combining the above measurements. [0003] The traditional azimuth-based radiation sour...

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Application Information

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IPC IPC(8): G01S5/02G01S5/16
Inventor 孙顺董凯刘瑜徐从安王聪郭晨王智
Owner NAVAL AVIATION UNIV
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