Indoor location non line of sight compensation method

An indoor positioning and compensation method technology, applied in the field of wireless communication, can solve the problems of low measurement accuracy and inability to obtain positioning results, etc.

Inactive Publication Date: 2016-04-13
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in a non-line-of-sight environment, the accuracy of the measurement method based on the time difference of arrival is low or the positioning result cannot be obtained

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  • Indoor location non line of sight compensation method
  • Indoor location non line of sight compensation method
  • Indoor location non line of sight compensation method

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[0053] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0054] The technical problem to be solved by the present invention is: in a non-line-of-sight environment, the accuracy of the measurement method based on the time difference of arrival is low or the positioning result cannot be obtained. In order to solve the above technical problem, an embodiment of the present invention provides a non-line-of-sight compensation method for indoor positioning.

[0055] Such...

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Abstract

The invention discloses an indoor location non line of sight compensation method and an indoor location method. The compensation method comprises the steps of acquiring base station coordinates of each base station arranged indoor and received signal strength indication of a received signal from each base station; obtaining estimated coordinates of a mobile terminal according to the acquired base station coordinates and received signal strength indication; obtaining an estimation value of a non line of sight error for every two base stations by use of the estimated coordinates of the mobile terminal according to the mobile terminal and a time difference of arrival location model having a specific non line of sight error of the two base stations; and replacing an undetermined non line of sight error with the estimated value of the non line of sight error so as to compensate the time difference of arrival location model. Through adoption of the method, the technical problem that the coordinates of the mobile terminal cannot be resolved due to overlarge time difference of arrival (TDOA) caused by the non line of sight error is solved, and accurate coordinates of the mobile terminal are obtained through non line of sight compensation for the TDOA.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a non-line-of-sight compensation method for indoor positioning, and also to an indoor positioning method. Background technique [0002] In the existing indoor positioning technology, people generally use a measurement method based on received signal strength (RSSI, Received Signal Strength Indication) and a measurement method based on time difference of arrival (TDOA, Time Difference of Arrival). [0003] RSSI (ie, Received Signal Strength Indication) is very closely related to spatial location. Through the relationship model between the received signal strength indication and the indoor location, we can deduce the location of the mobile terminal from the measured signal strength indication. Simply put, the closer the distance between the base station and the mobile terminal, the stronger the signal strength indication measured at the mobile terminal; the farther ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/10
CPCH04W64/006G01S5/10
Inventor 邓中亮郑若彧周巘翟晨阳曾辉陆顺保林洁
Owner BEIJING UNIV OF POSTS & TELECOMM
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