Direction-finding assisted defuzzification method for long-baseline time-of-flight positioning interferometer
A time difference positioning and interferometer technology, applied in positioning, radio wave measurement systems, instruments, etc., can solve problems such as time difference positioning ambiguity, achieve high promotion and application value, and improve the effect of passive positioning capabilities
Active Publication Date: 2019-06-21
THE 724TH RES INST OF CHINA SHIPBUILDING IND
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the multi-solution problem of the hyperbolic (surface) cross positioning equation in the long baseline time difference system, there is an inherent problem of time difference positioning ambiguity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The present invention will be described below in conjunction with the accompanying drawings. It should be understood that the accompanying drawings described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0013] The long baseline time difference positioning interferometer direction finding auxiliary defuzzification method of the present invention is as follows: figure 1 shown, including the following steps:
[0014] s1. For the fixed site distribution, make an airspace-repetition frequency parameter angle measurement threshold table, such as figure 2 shown;
[0015] s2. Run the complex signal time difference positioning program, read the pulse description word data in real time through the optical fiber or read the historical pulse description word data through the file;
[0016] s3. Store the pulse description words of the three stations into the corresponding cache respectively, take T se...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a direction-finding ambiguity-resolving method through a long baseline time difference positioning interferometer, and belongs to the field of passive positioning. The method mainly achieves the ambiguity-resolving processing of radar signal time difference positioning. The method based on the interferometer is used for positioning point pair observation station angle difference discrimination of different time difference matching based on the multiple-frequency positioning point feature analysis, and comprises the steps: firstly carrying out the high-precision direction finding of a detection target through the interferometer, enabling the detection target to be divided into different space domains, and determining the error threshold value of one space domain according to the domain and the corresponding multiple frequency; secondly carrying out the time difference calculation of data in a corresponding parameter range, and carrying out the positioning of a time difference result; finally carrying out the direct-finding comparison of the positioning points in the error range, eliminating the false positioning points outside the direct-finding error threshold value, and achieving the single-value time difference positioning after ambiguity resolving.
Description
technical field [0001] The invention belongs to the passive direction finding and positioning technology in the field of electronic signal reconnaissance. Background technique [0002] The time difference positioning method in the current passive positioning technology has the advantages of high positioning accuracy and simple positioning algorithm, and has been widely promoted in recent years. In practical application, this algorithm has a good effect in the location of multiple identification friend or foe signals, but there are many difficulties in the location of radar signals, especially multi-target high-repetition frequency signals. [0003] Time-difference positioning is a passive positioning technology that uses the time difference of the same radiation source signal to arrive at multiple stations to form a hyperbola (surface) for positioning. Due to its high positioning accuracy and simple positioning algorithm, long-baseline time-of-flight positioning has been wi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06
CPCG01S5/0252G01S5/06
Inventor 班书生严波
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND