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Ship formation precise positioning system and method based on TDOA principle

A precise positioning and ship technology, applied in positioning, radio wave measurement systems, measuring devices, etc., can solve problems such as limited geometric size and inability to meet positioning accuracy requirements

Pending Publication Date: 2019-01-18
成都和跃科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited geometric size and space of the ship deck, the baseline between the signal receiving points of the TDOA collection station is very short (10-100 meters), and the conventional time difference positioning (TDOA positioning) technology cannot meet the positioning accuracy requirements.

Method used

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  • Ship formation precise positioning system and method based on TDOA principle
  • Ship formation precise positioning system and method based on TDOA principle
  • Ship formation precise positioning system and method based on TDOA principle

Examples

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Effect test

Embodiment 1

[0024] The present invention designs a high-precision wireless positioning system based on the principle of TDOA with an independent and collaborative working mode, aiming at the application requirements of precise positioning for the formation of ships on the sea. The so-called "autonomy" means that the positioned ship actively transmits wireless beacon signals with parameter specifications, that is, the type and parameters of radio signals used for TDOA calculations are independently specified, generated and transmitted by the system according to the positioning accuracy requirements; the so-called "cooperative "It means that the wireless transmission on the positioned ship and the wireless reception of the central station ship work in coordination, and the subsequent data transmission, cross-correlation calculation and other work are also controlled and coordinated according to the process.

[0025] Such as figure 1 As shown, the present invention mainly adopts the GNSS sys...

Embodiment 2

[0034] Corresponding to Embodiment 1, this embodiment provides a method for precise positioning of a ship formation based on the principle of TDOA. The method is based on the above-mentioned precise positioning system for a ship formation, including steps:

[0035] The first wireless network communicator on the positioned ship transmits a wireless beacon signal through the first transceiver antenna;

[0036] The single-channel receiver on the positioned ship receives and processes the wireless beacon signal, generates IQ data with time stamp and antenna code stamp, and transmits it to the second transceiver antenna on the central station ship through the first transceiver antenna , and transmit it to the central control system through the second wireless network communicator;

[0037] Each channel of the multi-channel receiver on the central station ship receives and processes the wireless beacon signal, generates IQ data with time stamp and antenna code stamp respectively, an...

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Abstract

The invention relates to a ship formation precise positioning system and method based on a TDOA principle. The system comprises a first time frequency source on a positioned chip; a single-channel receiver and a receiving antenna which are connected; a first wireless network communicator and a first transceiving antenna which are connected; a second time frequency source on a central station chip;a multi-channel receiver and the receiving antennas which are connected; a second wireless network communicator and a second transceiving antenna which are connected; and a central control system. The first transceiving antenna is coupled with the receiving antenna of each receiving channel of the multi-channel receiver, the receiving antenna of the single-channel receiver and the second transceiving antenna. The system is a new positioning system based on the TDOA principle in a collaboration mode. Positioning precision is greatly improved. The precision deficiency resulting from the fact that a base line is too short is compensated. The technical problem of high precision mutual positioning among ships in maritime chip formation is solved successfully.

Description

technical field [0001] The invention belongs to the field of radio positioning, in particular to a ship formation precise positioning system and method based on the principle of TDOA (time difference of arrival). Background technique [0002] It is very important to grasp the position information of each ship in the ship formation and the precise positioning relationship between them in real time. On the one hand, it can allow command decision makers to understand the situation of maritime transportation or naval battlefields. On the other hand, this precise geometric relationship is the battlefield The prerequisite for the fusion processing of multi-type target information in the environment. At present, GNSS systems are mainly used for ship positioning, including GPS in the United States, GLONASS in Russia, Galileo in Europe, etc. my country's Beidou navigation system has also completely covered the Asia-Pacific region, with sub-meter positioning accuracy. [0003] Howeve...

Claims

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Application Information

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IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 谭宏伟周镭常晓军
Owner 成都和跃科技有限公司
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