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Method for positioning portable communication device

A technology of communication device and positioning method, which is applied in the field of positioning, can solve problems such as high cost and unrealizable cost, and achieve the effects of reducing error range, precise positioning coordinates, and improving positioning accuracy

Inactive Publication Date: 2009-02-25
INVENTEC(NANJING) TECH CO LTD
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  • Claims
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Problems solved by technology

However, the actual situation cannot be a uniformly distributed Gaussian noise environment, and the Gaussian environment can only be an approximate and ideal simulation
[0010] 3. A large number of environmental impact factors need to be measured from the actual environment. Although this method can achieve good results in theory, the cost of its implementation and maintenance is high, and it is often impossible in practical applications due to the cost. accomplish

Method used

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  • Method for positioning portable communication device
  • Method for positioning portable communication device
  • Method for positioning portable communication device

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Embodiment Construction

[0050]In order to make the above-mentioned features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

[0051] The general positioning algorithm does not take the surrounding environmental factors into account when it is actually applied, which makes the error range of positioning quite large. Therefore, in order to improve the positioning accuracy, the present invention proposes a method of using the environmental characteristic value to correct the field strength values ​​of each base station detected by the portable communication device, so as to improve the positioning accuracy. In order to make the content of the present invention clearer, the following specific examples are given as examples in which the present invention can actually be implemented.

[0052] figure 1 It is a flowchart of a positioning method for a portable communication device according to an emb...

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Abstract

A method for positioning a portable communication device comprises the following steps: firstly, detecting the field strength values of a plurality of base stations close to the portable communication device so as to calculate the positioning coordinate of the portable communication device; then, retrieving the environmental characteristic values between each base station and the portable communication device from a geographic information system according to the base station coordinate and the positioning coordinate of each base station so as to substitute the environmental characteristic values into the path loss model to correct the field strength values of each base station; and recalculating the positioning coordinate, at which the portable communication device is positioned, based on the corrected field strength values, thereby improving the positioning accuracy.

Description

technical field [0001] The present invention relates to a positioning method, and in particular to a method for recalculating the positioning coordinates of the portable communication device by correcting the field strength value obtained. Background technique [0002] Location Based Service (LBS) is to obtain the user's location information (for example, longitude and latitude or the geographical environment of the local street, etc.) ), or other organizations and individuals requesting the user's location. Due to the low-cost, high-precision and easy-to-popularity of using the mobile device itself for positioning, in recent years, the positioning service of mobile devices has been widely used in emergency rescue, car navigation, intelligent transportation, team management, etc., and has become the current One of the most notable developments. [0003] Generally speaking, if the error caused by the propagation environment is not considered, the current positioning algorit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/02G01S11/06H04Q7/22H04Q7/38G01S19/00
Inventor 张大伟
Owner INVENTEC(NANJING) TECH CO LTD
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