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Wireless locating method and system

A wireless positioning system and wireless positioning technology, applied in wireless communication, electrical components and other directions, can solve the problems of affecting positioning effect, interference or even submergence, poor estimation accuracy of propagation time parameters, etc., to reduce mutual influence and improve accuracy. Effect

Inactive Publication Date: 2014-03-26
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

But in the first method, the distance between the base station and the mobile station will affect the arrival power of the downlink signal of the base station, which makes the signal of the far base station be interfered or even submerged by the signal of the closer base station, and its propagation time The estimation accuracy of the parameters will be relatively poor, which will further affect the positioning effect

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  • Wireless locating method and system
  • Wireless locating method and system

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[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0020] The wireless positioning method of the present invention, such as figure 1 shown, including steps:

[0021] Step S101, receiving downlink signals from each base station at the terminal;

[0022] Step S102, calculating the signal strength of the downlink signal when it reaches the terminal, and feeding back the signal strength to the source base station;

[0023] Step S103, according to the signal strength of the downlink signal sent by the base station when it reaches the terminal, adjust the power of the downlink signal sent by the base station, so that the...

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Abstract

The invention discloses a wireless locating method and a wireless locating system. The transmitting power of each base station is adjusted according to the intensities of downlink signals which reach a terminal, so that the intensities of the downlink signals transmitted to the terminal by the base stations trend toward a consistence, so that the difference of the intensities of the reached signals caused by the different propagation loss can be reduced, the influence on the signals in the base stations caused by a near-far effect can be effectively prevented, and the accuracy of locating and estimating the terminal can be improved.

Description

technical field [0001] The invention relates to the technical field of mobile communication positioning, in particular to a wireless positioning method and system. Background technique [0002] At present, using the propagation time of downlink signals of multiple base stations to the mobile station / UE (terminal) to estimate the position of the mobile station is a common wireless positioning technology in the cellular communication system. [0003] There are two main ways to obtain time estimates. One is to introduce a special signal known to both the sender and the receiver, and obtain the propagation delay by finding the correlation peak; the other is to adopt a certain propagation loss model to map the power of the received signal to the propagation distance and propagation delay. But in the first method, the distance between the base station and the mobile station will affect the arrival power of the downlink signal of the base station, which makes the signal of the far...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
Inventor 付杰尉邓单张远见张榕彬陈卫安冯穗力丁跃华胡应添
Owner COMBA TELECOM SYST CHINA LTD
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