Mobile phone positioning system and method using field strength and differential fingerprint under macro base station conditions

Abstract

The invention discloses a mobile phone positioning system and method for positioning by using field intensity and differential fingerprints under a macro base station condition. The method comprises the following steps: acquiring the identity information of a mobile phone by using a mute calling way; monitoring mobile phone uplink information and base station downlink command information by using different location measuring unit (LMU) equipment; acquiring the uplink signal intensity of a mobile phone; summarizing fingerprint information acquired by different LMUs by controlling different LMUs through a position determination unit (PDU) to obtain the position fingerprint vector of a user at a current moment and a current position; performing fingerprint positioning on a user terminal by using a weighted K proximal algorithm in combination with a field intensity fingerprint library and a differential fingerprint library which are established in advance. Meanwhile, if the PDU detects that fingerprint data uploaded by the LMUs is incomplete, the lengths of relevant codes for capturing in the LMUs can be automatically adjusted, and secondary capturing of a target mobile phone signal by the LMUs is initiated, so that the capturing probability of the mobile phone signal is increased. By adopting the positioning system and method, the probability that the positioning accuracy is within 20m can be up to 67 percent. Moreover, the whole system can keep mute without interference, and the detection probability is lowered.

Description

technical field [0001] The invention relates to the fields of signal processing technology, mobile communication technology and wireless positioning technology, and is suitable for a mobile phone positioning system in a macrocellular environment. Background technique [0002] In open environments such as deserts, mountainous areas, rural areas, and coastal areas, the mobile communication system adopts the macro base station mode, and the positioning accuracy of the positioning method based on CELL-ID is more than 1 km, which cannot meet the application requirements. Development of mobile positioning system. The traditional method based on pseudo base stations and gradual approach requires a lot of manpower and material resources and has poor concealment. Therefore, it is necessary to design a new positioning system in the environment of macro base stations, which can provide real-time positioning functions with an accuracy within 20 meters. , and at the same time meet the a...

AI Technical Summary

Problems solved by technology

[0033] The present invention aims at the problem that the current mobile communication system using the macro base station method based on the CELL-ID positioning method has a positioning accuracy of more than 1 km in open environments such as deserts, mountainous areas, rural areas, and coastal areas, and cannot meet the current actual positioning needs. Under the condition of the macro base station, the mobile phone positioning system and method using field strength and differential fingerprint, using the fingerprint positioning algorithm of field strength fingerprint combined with differential fingerprint to locate the target, the probability of error within 20 meters can reach 67%

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