UWB (ultra wide band) wireless positioning method based on double-difference duplex

Abstract

The invention discloses a UWB (ultra wide band) wireless positioning method based on double-difference duplex, and the method comprises the steps: S1, setting a time slot according to the number of label refreshing times and the total number of labels; S2, enabling a main base station to transmit a broadcast instruction to each label, and enabling each label to determine its own time slot; S3, enabling each label to transmit a distance measurement package in the corresponding time slot, and enabling the main base station to transmit a synchronization package after receiving the distance measurement package; S4, enabling each slave base station to receive the distance measurement package and the synchronization package, and calculating the time difference delta t<k> between the moments when the two signals are received, wherein k is equal to 1, 2, 3,..., N; S5, carrying out the calculation according to the coordinates of the main base station, the coordinates of each slave base station and the time difference delta t<k>, and obtaining an equation: r<k+1>-r<k>, wherein k is equal to 1, 2, 3,..., N; S6, carrying out the TDOA solving according to the distance difference calculated at step S5, and obtaining the coordinates of the labels. The method increases the capacity and efficiency of a positioning system, and can eliminate the influence from the difference between different labels and between different base stations. During application, the base stations do not need to be synchronized, and the method is higher in positioning precision.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to an ultra-wideband wireless positioning method based on double differential duplexing. Background technique [0002] UWB positioning technology is a kind of wireless positioning technology. Wireless positioning technology refers to the measurement method and calculation method used to determine the location of mobile users, that is, the positioning algorithm. At present, the most commonly used positioning technologies mainly include: time difference positioning technology, signal angle of arrival measurement (AOA) technology, time of arrival positioning (TOA) and time difference of arrival positioning (TDOA) and so on. Among them, TDOA technology is the most popular solution at present. In addition to being used in GSM system, it is also widely used in other systems such as AMPS and CDMA. UWB positioning also adopts this technology. [0003] Usually, the UWB positioning syste...

AI Technical Summary

Problems solved by technology

This method mainly solves the problem of solving the position of the measured target relying on the time difference detected by multiple signal receivers in short-distance and long-distance multi-scenes. The method does not solve the problem that the base stations need to

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