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Positioning algorithm based on signal gain and loss of 2.5G wireless network

A wireless network signal and positioning algorithm technology, applied in the field of positioning algorithms based on 2.5G wireless network signal gain and loss, can solve the problems of low positioning sensitivity and low positioning accuracy.

Inactive Publication Date: 2015-11-25
CHENGDU GOLDENWAY ELECTRONICS
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Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a positioning algorithm based on the signal gain and loss of 2.5G wireless network to solve the problem of low positioning accuracy caused by antenna gain and signal loss in the 2.5G wireless network. and the problem of low positioning sensitivity

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  • Positioning algorithm based on signal gain and loss of 2.5G wireless network

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings.

[0043] see figure 1 , figure 1 It is a flow chart S100 of the positioning algorithm based on 2.5G wireless network signal profit and loss of the present invention; the flow chart S100 includes steps S101 to S105;

[0044] In step S101, the antenna gain and loss of the signal transmission between the mobile terminal and the base station in the 2.5G wireless network are obtained; a high-gain directional antenna must be used in the 2.5G wireless network, and the narrower the main lobe width of the antenna, the higher the gain. At a specific power, the higher the gain, the greater the radiation range;

[0045] According to an embodiment of the present application, in the signal transmissi...

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Abstract

The invention discloses a positioning algorithm based on signal gain and loss of a 2.5G wireless network. The algorithm comprises the following steps: calculating antenna gain and signal loss of mobile terminals and base stations during signal transmission in the 2.5G wireless network; obtaining an estimated coordinate value of a mobile terminal communicating with each base station; through the estimated coordinate values and coordinate value information of each base station communicating with the mobile terminals, obtaining an average distance estimated error through calculation; according to the antenna gain, the loss, the average distance estimated error and the density of the base stations, obtaining coordinate values of the plurality of mobile terminals through calculation; and solving a sum of the coordinate values of the plurality of mobile terminals, and then performing averaging to obtain real coordinate values of the mobile terminals so that the mobile terminals are positioned under the condition of the signal loss of the 2.5G wireless network. The algorithm provided by the invention is based on full consideration of the loss of signals in a transmission process, is more accurate in positioning, is suitable for outdoor application, and also has a quite good positioning effect in indoor application.

Description

technical field [0001] The invention specifically relates to a positioning algorithm based on the profit and loss of 2.5G wireless network signals. Background technique [0002] At present, the positioning of mobile terminals generally adopts GPS positioning technology, but because GPS positioning technology is too dependent on the performance of mobile terminals, the work of satellite scanning, capture, pseudo-range signal reception and positioning calculation is integrated into the terminal, resulting in low positioning sensitivity, Defects such as long time consumption and high power consumption of the terminal; moreover, the GPS positioning technology only works well outdoors, but the effect is poor indoors or in places where satellite signals cannot be covered, and if there are no more than 3 satellites in the sky above the location , the system cannot achieve positioning from the cold start state. [0003] In addition to GPS positioning technology, the trilateration p...

Claims

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Application Information

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IPC IPC(8): G01S5/06G01S5/02G01S5/14H04W64/00
CPCG01S5/0257G01S5/0273G01S5/06G01S5/14H04W64/003
Inventor 陈颖
Owner CHENGDU GOLDENWAY ELECTRONICS
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