Hybrid location method based on A-GPS technology and TDOA technology

A technology of hybrid positioning and positioning methods, applied in the field of hybrid positioning based on A-GPS and TDOA technology, can solve the problems of GPS receivers unable to output effective information, immature technical conditions, and not widely popularized, and achieve short measurement time. , a wide range of coverage, the effect of a wide range of applications

Inactive Publication Date: 2014-04-16
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Description
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Problems solved by technology

However, due to immature technical conditions and other reasons, the popularity is not very wide
As a traditional positioning method, GPS is very popular, but once the GPS s

Method used

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  • Hybrid location method based on A-GPS technology and TDOA technology
  • Hybrid location method based on A-GPS technology and TDOA technology
  • Hybrid location method based on A-GPS technology and TDOA technology

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Embodiment Construction

[0040] A hybrid positioning method based on A-GPS and TDOA technology of the present invention will be described in detail below in conjunction with the accompanying drawings, taking vehicle positioning as an example.

[0041] In the present invention, the signal transmitted from the mobile phone of the vehicle-mounted mobile terminal is transmitted to the adjacent base station through the mobile communication network, and the base station detects the arrival time of the signal, and transmits the arrival time to the positioning center. The positioning center receives the signal arrival time detected by each base station, estimates the time difference TDOA of the signal arriving at the adjacent base station, and calculates the longitude, latitude and other information of the vehicle location point. Then, the obtained real-time vehicle position data is transmitted to the map matching module. By matching this coordinate information with the electronic map, the vehicle's position ...

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Abstract

The invention provides a hybrid location method based on the A-GPS technology and the TDOA technology. The hybrid location method comprises the following steps of initializing equipment, selecting a location mode, namely an A-GPS location mode or a TDOA location mode, obtaining the longitude and latitude coordinates of an object to be located, conducting map matching and outputting a location result. Compared with the prior art, the hybrid location method based on the A-GPS technology and the TDOA technology makes the most of both the advantages of a wide coverage range and short measuring time of the TDOA location method and the advantage of high measuring accuracy of the A-GPS location method, meets the requirement for accurate location in various complex environments through complementation of the advantages of the two location methods, and is high in practicability, wide in application range and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a hybrid positioning method based on A-GPS and TDOA technology. Background technique [0002] With the continuous development of science and technology and the continuous improvement of people's living standards, cars, as a major means of transportation, are playing an increasingly important role in people's daily lives. The continuous increase in the number has caused the existing roads to be far from meeting the needs, the road load is serious, and problems such as traffic congestion, congestion, traffic accidents, and environmental pollution are also increasing. The deterioration of traffic conditions has caused heavy losses to all countries. [0003] Location-based service (LBS, Location Based Service), also called mobile location service (LCS, Location Service), is the product of the integration of Internet technology and communication technology. It obt...

Claims

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Application Information

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IPC IPC(8): G01S19/48
CPCG01S19/48G01S5/06
Inventor 宋秀苗
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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