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Method of positioning cellular network under environment of direct stations

A positioning method and repeater technology, applied in the field of mobile communications, can solve problems such as reducing system positioning accuracy and system synchronization errors, and achieve the effects of eliminating errors, ensuring inheritance, and improving real-time performance

Inactive Publication Date: 2006-04-19
SHENZHEN TINNO WIRELESS TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned positioning technology has the following disadvantages: firstly, it is necessary to modify the existing repeater system and add corresponding positioning auxiliary units and communication modules; secondly, in the repeater system, it is necessary to perform baseband processing and synchronization, synchronization and baseband processing It will bring the synchronization error of the system and reduce the positioning accuracy of the system

Method used

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  • Method of positioning cellular network under environment of direct stations
  • Method of positioning cellular network under environment of direct stations
  • Method of positioning cellular network under environment of direct stations

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Embodiment Construction

[0017] In the repeater environment, the communication of mobile station MS (MS-Mobile Station) is as follows: figure 1 As shown, when the communication bit error rate of the base station BS (BS-Base Station) of the mobile communication system exceeds a certain range, the communication between the mobile station and the base station is switched to the communication between the mobile station and the repeater (Repeater). The communication signals between the base stations are all amplified and forwarded by the repeater.

[0018] The use of repeaters in the CDMA system will cause timing delay and signal delay spread. If the delay is large, the phase of the pilot code in the mobile communication system will change, resulting in problems such as dropped calls. It is necessary to adjust the connection of the donor base station. Incoming channel search window width, reverse traffic channel search window width, activation pilot channel and search window width, and at the same time, th...

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Abstract

The method is suitable to GSM, CDMA, WCDMA etc. cellular network. In evaluation of signal detection under environment of direct station, using change of search through window determines whether route of signal transmission is direct station or not. When route of transmission is of direct station, equation of distance measurement is built under condition for route of direct station; when route of transmission is not of direct station; equation of distance measurement is built under condition for route of not direct station. Meanwhile, relevant hyperbola equation and system positioning module are constructed. Then, using conventional least square algorithm solves position of target. Self-adapting method and difference method are adopted in the invention to adjust length of data and eliminate error respectively. Thus, the invention raises positioning accuracy, does not change hardware structure of system, and guarantees succession of system and positioning in real time.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a positioning method for a mobile terminal. Background technique [0002] The basic function of the repeater is to amplify the radio frequency signal bidirectionally. It amplifies and forwards the uplink signal transmitted by the mobile station and the downlink signal transmitted by the base station. Receive the signal of the serving base station in the downlink direction, filter out the signal outside the frequency band through the band-pass filter, amplify the useful signal and then send the signal to the coverage area. In the uplink direction, the mobile station signals in the coverage area are similarly processed and then transmitted to the corresponding base station, thereby realizing signal transmission and communication between the base station and the mobile station. [0003] The positioning method closest to this application is the TDOA positioning technology based o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38G01S5/12H04W64/00
Inventor 田增山
Owner SHENZHEN TINNO WIRELESS TECH