Location information field-based radiation source localization algorithm

A technology of position information and positioning algorithm, which is applied in the field of radiation source positioning algorithm based on position information field, which can solve the problems of poor multi-target capability, limitation, and short common view time.

Active Publication Date: 2014-04-09
NO 8511 RES INST OF CASIC
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Problems solved by technology

This constraint is often difficult to satisfy in many cases, for example, due to the large distance between stations or the radiation pattern of the transmitting/receiving antenna, there are significant differences in the signal strength of the radiation source arriving at each station. It is likely that some observation stations receive signals while some Some observatories do not receive signals
Due to the above reasons, the "common view" time of the system is short, only sporadic positioning results can

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  • Location information field-based radiation source localization algorithm
  • Location information field-based radiation source localization algorithm
  • Location information field-based radiation source localization algorithm

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] 1. Signal model

[0038] combine figure 1 and figure 2 , the multi-station passive detection and positioning system consists of a cooperative observation system composed of a main station and two or more auxiliary stations and information links between stations. Each observation station can be fixed or mobile, depending on the specific application occasion. The coordinated observation system forms a certain geometric configuration in space. The whole system monitors and analyzes the space electromagnetic environment, searches and determines the radiation source target of interest, and determines the position of the radiation source through cooperative observation by the main station and each auxiliary station.

[0039] The traditional time difference positioning method measures the time difference of the radiation source signal arriving at the rece...

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Abstract

The invention discloses a location information field-based radiation source localization algorithm. The location information field-based radiation source localization algorithm comprises the following steps that: first step, correlation processing is performed on time segments of acquired data so as to extract time difference of arrival (TDOA) information; second step, grid points are arranged in an area; third step, a cost function is constructed, and the values of the cost function at each grid point in the rectangular area are solved; and fourth step, and a point where the value of the cost function is maximum in the area is selected as a target location. With the location information field-based radiation source localization algorithm of the invention adopted, limitations of the performance of an existing multi-station passive detection localization system can be eliminated, and fast and accurate localization of a target can be realized under non-vision-shared and multiple-target situations.

Description

technical field [0001] The invention belongs to an electronic reconnaissance system, and in particular relates to a radiation source positioning algorithm based on a position information field. Background technique [0002] Passive detection and positioning of radio radiation sources is widely used in military and civilian fields such as communication law enforcement monitoring, disaster search and rescue, and electronic reconnaissance. [0003] The existing multi-station passive detection and positioning technology first extracts the observations such as the arrival time difference, frequency difference, and direction of the radiation source signal, and then combines the position information of each observation station to realize the target position estimation by solving the positioning equations. This traditional approach has at least the following drawbacks: [0004] 1) Signal detection relies on traditional means, and most of them are based on single-station observation...

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Application Information

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IPC IPC(8): G01S5/06
CPCG01S5/0278G01S5/06
Inventor 田达郭辉杨树树卢鑫马琴吴昊马贤同张奎
Owner NO 8511 RES INST OF CASIC
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