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Method for positioning RTK based on TD-SCDMA

A TD-SCDMA, positioning method technology, applied in the communication between multiple stations, electrical components, radio/induction link selection and arrangement, etc. Requests and other issues to achieve the effect of satisfying positioning requests and increasing flexibility

Inactive Publication Date: 2007-01-17
CHONGQING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

The existing wireless positioning technology is based on the mobile terminal communication base station, which is greatly affected by the environment, especially in the urban area because there are many tall buildings and the radio wave propagation environment is not good, it is difficult for the signal to reach the mobile station directly from the base station, generally through reflection and refraction and diffraction, so the positioning accuracy will be affected, the positioning range is 100 to 200 meters, and the general positioning response time is between 3 and 6s
It can only meet the positioning requests of ordinary users, but cannot meet some special requests of users, including location requests under high-precision and high-speed moving conditions

Method used

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  • Method for positioning RTK based on TD-SCDMA
  • Method for positioning RTK based on TD-SCDMA
  • Method for positioning RTK based on TD-SCDMA

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Embodiment Construction

[0013] RTK is a real-time dynamic positioning technology based on the carrier phase observations sent by GPS satellites. In the RTK working mode, the reference station transmits its observations and the observation station coordinate information to the rover through the data link. The rover not only uses the data The chain accepts the data from the reference station, but also collects GPS observation data, and composes the differential observation value in the system for real-time processing, and also provides the positioning result. RTK is divided into two categories: correction method and difference method. The former is the same as the pseudorange difference. The base station sends the carrier phase correction to the user station to correct its carrier phase, and then solve the coordinates. The latter sends the carrier phase collected by the reference station to the rover for difference and coordinate calculation. The former is a quasi-RTK technology, and its accuracy can reach...

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Abstract

In the positioning service field there is no any service that can meet the positioning request of user at state of high accuracy and high moving speed. The invention embeds both quasi RTK and RTK methods into TD-SCDMA system to design the positioning process, define the relevant communication interface and message and select different algorithm according to the user's QoS requirement to meet the need of positioning request in different accuracy level.

Description

Technical field [0001] The present invention relates to mobile communication technology, in particular to TD-SCDMA (Time Division Synchronous Code Division Multiple Access) positioning technology. Background technique [0002] The wireless positioning service is also called location based services (LBS), which is a value-added service provided by the mobile communication network. The existing wireless positioning technology is based on the mobile terminal communication base station, which is greatly affected by the environment, especially in the urban area due to the large number of tall buildings, and the radio wave propagation environment is not good. It is difficult for the signal to reach the mobile station directly from the base station, generally through reflection and refraction. And diffraction, so the positioning accuracy will be affected. The positioning range is 100-200 meters, and the positioning response time is generally between 3-6s. It can only meet the positionin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/26H04W64/00
Inventor 袁正午姚雪夏英刘兆宏鱼详训邹永贵周鹏裵海英葛君伟
Owner CHONGQING UNIV OF POSTS & TELECOMM
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