Outdoor cluster matching and positioning method and device

Abstract

The invention discloses an outdoor cluster matching and positioning method and device. The method includes the feature library manufacturing stage, wherein cluster segmentation is conducted on a grid according to the grid environment, and a feature library is divided into a plurality of sub feature libraries according to the category; and includes the positioning stage, wherein when a terminal side initiates a positioning request to a network side, the network side conducts position estimation according to the radio frequency signal feature quantity reported by a terminal; after cluster analysis is conducted on the radio frequency signal feature quantity according to a position estimation value, matching is conducted in the corresponding sub feature library according to the category, and then a positioning result is acquired; the positioning result is returned to the terminal side, and then the current positioning process is finished. The outdoor cluster matching and positioning method and device have the advantages that the defects that in the prior art, measurement accuracy is low, the misjudgment rate is high, and the application range is narrow can be overcome, and high measurement accuracy, the low misjudgment rate and the wide application range are achieved.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular, to an outdoor cluster matching positioning method and device. Background technique [0002] Terminal positioning technology is a method of using wireless communication network resources to determine the location of terminal users on the surface of the network. It appears with the application of wireless communication technology and develops following the evolution of wireless communication networks. Since the 1980s, due to the emergence of cellular mobile communication systems and people's needs for intelligent transportation systems and call tracking, new requirements have been put forward for terminal positioning technology. The U.S. Federal Communications Commission (FCC) announced the E-911 regulation in 1996, requiring that before October 1, 2001, the wireless cellular systems of all telecommunications operators in the United States must provide a positioning...

AI Technical Summary

Problems solved by technology

[0021] The positioning technology based on the maximum likelihood algorithm is a point estimation algorithm, which assumes that the measured values ​​are relatively independent and the measurement errors obey the Gaussian distribution, which often cannot fit the actual situation well, because the actual measurement errors are random and do not necessarily satisfy Gaussian distribution

In addition, for this kind of positioning technology, in one measurement, for the signal strength of the assigned cell in the characteristic database, but the signal strength of the cell is not measured in the position measurement value, there are two existing processing methods: first, Simply setting the field strength of the cell to a constant value that is much smaller than the normal measured value, this processing method cannot well reflect the difference from those cells with weak signal strength; second, or in calculating the likelihood function When the contribution of this item is not considered, that is, the error of this item is considered to be 0, causing the likelihood function to be smaller than the actual situation, thus misjudging the actual terminal position

[0022] In the process of realizing the present invention, the inventor found that there are at least defects such as low measurement accuracy, high misjudgment rate and small application range in the prior art

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