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Method and system for calculating position based on triangle positioning of forwarding chain in high rank

A technology of forward link and triangulation positioning, applied in positioning, radio wave measurement system, measuring device, etc., can solve the problems of long positioning time and low positioning accuracy

Inactive Publication Date: 2006-07-05
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The positioning time using GPS is longer and the positioning accuracy is lower

Method used

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  • Method and system for calculating position based on triangle positioning of forwarding chain in high rank
  • Method and system for calculating position based on triangle positioning of forwarding chain in high rank
  • Method and system for calculating position based on triangle positioning of forwarding chain in high rank

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Embodiment Construction

[0078] figure 1 A schematic diagram of the system structure of the position calculation system of the present invention is given, specifically including: encoding / decoding subsystem 11, pilot frequency calculation subsystem 12, base station database subsystem 13, pilot frequency optimization subsystem 14, position calculation subsystem 16. Location result optimization subsystem 15, wherein:

[0079] Encoding / decoding subsystem 11, according to the IS801 protocol, resolves the IS801 code stream sent by the mobile station 2 into a corresponding structure, and compiles the final positioning calculation result into an IS801 code stream;

[0080] The pilot solution calculation subsystem 12 is responsible for calculating the pilot phase difference and sector PN from the PPM measured by the mobile station 2, and completing the correction of the phase difference. PN (Pseudo Random Noise) is pseudo-random noise;

[0081] Base station database subsystem 13, the function of obtaining th...

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Abstract

The invention discloses a position calculating method and system based on high grade forward link triangular location, for CDMA mobile communication network, firstly decoding a code flow transmitted by a mobile station, screening pilot frequency phase measurement and calculating a pilot frequency phase difference between each non-reference sector and the reference sector, then preferring the pilot frequency phase measurement and calculating positions, preferring one of the multi-location results, and finally encoding the preferred location result to the mobile station. The system has locating accuracy able to achieve an ideal effect. The test shows that the locating error can be within 100 m, a relatively ideal effect in the present wireless environment and the AFLT-based location technique.

Description

technical field [0001] The invention relates to a location solution method and system of a Code Division Multiple Access (CDMA) mobile communication network, in particular to a location solution method and system based on advanced forward link triangulation. Background technique [0002] Location-based services (LBS: Location Based Services), also known as mobile location services or positioning services, refer to mobile communication networks that obtain mobile terminal geographic location information (latitude and longitude coordinates) through specific positioning technologies and provide them to mobile users themselves, communication systems, etc. Or a third party, and with the support of certain electronic map information, provide mobile users with calling or non-calling services related to their location. Recently, with the rapid development of location services, the corresponding positioning technology has also developed rapidly. [0003] The positioning methods of C...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S5/14H04W64/00
Inventor 李昭福
Owner ZTE CORP
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