Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Identification method for non-visual path and mobile terminal positioning method

A mobile terminal and path technology, applied in electrical components, wireless communication, etc., can solve the problems of inaccurate NLOS identification and inaccurate positioning of mobile terminals, and achieve the effect of reducing the probability of wrong identification and improving positioning accuracy

Inactive Publication Date: 2012-07-04
SPREADTRUM COMM (SHANGHAI) CO LTD
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a non-visible path identification method to solve the problem that the mobile terminal cannot be accurately positioned in the cellular mobile communication network due to inaccurate NLOS identification in the prior art

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Identification method for non-visual path and mobile terminal positioning method
  • Identification method for non-visual path and mobile terminal positioning method
  • Identification method for non-visual path and mobile terminal positioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0034] see figure 1 As shown, it is a flow chart for implementing the identification method of the non-visual path of the present invention, the method includes the following steps:

[0035] Step S101, calculating the cost function of the time-of-arrival measurement value from the mobile terminal to the base station;

[0036] At a single moment j, the mobile terminal goes to the mth base station BS m Time-of-arrival measurements for is defined by:

[0037] TOA m j = TOA m 0 + NLOS m j + n m j

[0038] in, For the mobile terminal to the mth base station BS m the actual arrival time of is the error caused by the non...

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

No PUM Login to View More

Abstract

The invention discloses an identification method for a non-visual path and a mobile terminal positioning method, and aims to provide a method for identifying the non-visual path to position a mobile terminal only by utilizing a line-of-sight propagation path in honeycomb mobile communication. Key points of the technical scheme are that: cost functions of time difference of arrival (TDOA) / time of arrival (TOA) measured values between the mobile terminal and base stations are calculated, and non-line of sight (NLOS) base stations and LOS base stations are identified; and the position of the mobile terminal is calculated according to the positions of the LOS base stations and the TDOA / TOA measured values. The base stations with NLOS propagation are accurately identified, and the mobile terminal is positioned only by the LOS propagation path according to the positions of the base stations and the TDOA / TOA measured values between the mobile terminal and the base stations in a positioning process, so that the aim of improving positioning accuracy is fulfilled.

Description

technical field [0001] The invention relates to a non-visible path identification method and a mobile terminal positioning method, in particular to a method for locating a mobile terminal by identifying a non-visible path in cellular mobile communication and only utilizing a line-of-sight propagation path. Background technique [0002] In the cellular network mobile terminal positioning system, due to the existence of uncertain obstacles in the wireless transmission environment, the direct path of electric wave transmission between the mobile terminal and the base station is blocked, and the electric wave will be reflected, refracted, and diffracted. The non-line of sight (NLOS) propagation mode propagates, and as a result, the electromagnetic signal experiences more time delay, which brings a larger error to the positioning. Nokia's on-site measurement results show that the average NLOS error in the GSM network environment reaches 500-700 meters, and Korea Telecom's measure...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/08H04W64/00
Inventor 冷欣董霄剑
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com