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Positioning method based on signal time delay characteristic space-time distribution

A technology of time-space distribution and positioning method, applied in positioning, measuring devices, instruments, etc., can solve the problems of inconsistent space-time reference, poor signal/information fusion, etc., achieve low operation complexity and cost, small path transmission loss, The simple effect of positioning requirements

Active Publication Date: 2018-01-19
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of this, the present invention solves the local area of ​​complex scenarios (physical occlusion, electromagnetic interference, military strike / confrontation, etc.) / Hotspot emergency navigation and positioning service requirements, a time-space distribution positioning method based on signal delay characteristics is proposed

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  • Positioning method based on signal time delay characteristic space-time distribution
  • Positioning method based on signal time delay characteristic space-time distribution
  • Positioning method based on signal time delay characteristic space-time distribution

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0042] A time-space distribution positioning method based on signal delay characteristics, the system to which this method is applicable includes a ground reference network composed of multiple monitoring reference stations, such as figure 1 As shown, the specific process is:

[0043] 1). Modeling variable preprocessing and classification mapping storage

[0044] The intermediate frequency data of the signals received by the monitoring reference stations of the ground reference network are collected, and the intermediate frequency signals are compared and processed by the matched filter to obtain the relative time delay estimation of the signals arriving at each reference station. The logarithm of the relative delay ratio of the reference station is determined by factors such as the size of the hotspot service area, the number of terminals detected at t...

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Abstract

The invention provides a positioning method based on signal time delay characteristic space-time distribution. The method includes the following concrete steps: firstly, extracting space-time distribution model modeling variables, the variables including numbers of monitoring reference stations, accurate position coordinates of the monitoring reference stations, relative time delay estimations when signals reach the monitoring reference stations, and corresponding signal source ends of received signals; secondly, constructing a signal time delay characteristic space-time distribution model, selecting four reference stations, and according to relative time delay estimations from the slave reference stations to the main reference station, calculating accurate positions of signal sources through the signal time delay characteristic space-time distribution model; and thirdly, screening the multiple monitoring reference stations that are close to the user terminal, selecting at least threesignal sources, and utilizing information about the accurate positions of the three signal sources and combining position information of the screened monitoring reference stations to calculate the position of the user terminal through the space-time distribution model. According to the method, positioning demands are simple, the operation complexity is low, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of radio navigation communication, and in particular relates to a positioning method based on time-space distribution of random / opportunistic signal delay characteristics. Background technique [0002] The Beidou satellite navigation system is the main navigation system in my country at present and for a period of time in the future. However, it is similar to foreign satellite navigation systems such as GPS, Galileo, and GLONASS. The constellation / signal is transparent and open, and it is vulnerable to enemy anti-defense weapons in wartime. Weak / destroy capability; the shortage of resources on the star leads to weak signal landing power (vulnerability), and is sensitive to terrain occlusion / physical barriers, resulting in the existence of "shadow areas" in services. In particular, it cannot effectively combat enemy electromagnetic interference during wartime. In the future Under the war mode of strong electrom...

Claims

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Application Information

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IPC IPC(8): G01S5/10G01S5/14G01S5/02
Inventor 袁洪罗瑞丹徐颖欧阳光洲梁丹丹袁杰田向伟
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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