Indoor equipment positioning system and method

Abstract

The invention provides an indoor device positioning system and method. The system comprises at least two indoor devices and at least four base stations, wherein clock synchronization is kept among thebase stations; wherein the setting positions of the base stations meet the condition that any four base stations are not located on the same plane, and the indoor device can receive signals transmitted by at least three base stations at any position; wherein the number of the base stations is the minimum number meeting the condition; when the indoor device can receive the signals of the three base stations at present, the current three-dimensional positioning position is determined according to the TOF, and when the indoor device can receive the signals of the at least four base stations at present, the current three-dimensional positioning position is determined according to the TDOA; and the base station sequentially arranges the received signals, the first signal is not marked and is not at the tail position, when the time for processing the homologous signals last time and the current time are within a certain duration, the first signal is moved to the tail position and marked, and otherwise, the first signal is processed. According to the scheme, the signal of each indoor device can be processed in time, so that the positioning accuracy is improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an indoor device positioning system and method. Background technique [0002] GPS (Global Positioning System, Global Positioning System) positioning is currently the most commonly used device positioning implementation method, but it is not suitable for indoor device positioning. Existing common indoor wireless positioning technologies include cellular, WiFi, Bluetooth, infrared, ultra-wideband, RFID (Radio Frequency Identification, radio frequency identification), ZigBee (Zigbee protocol) and ultrasonic waves. [0003] Taking ultra-broadband positioning as an example, several base stations can be installed indoors. During the indoor movement of indoor devices, positioning algorithms are used to perform positioning according to the distance parameters between them and each base station. The execution of the positioning algorithm will involve the transmission and reception of s...

AI Technical Summary

Problems solved by technology

[0004] However, when the number of signals received in a short period of time is large, it may happen that the base station has been processing the signal sent by a certain indoor device, and it is later than processing the signal sent by other indoor devices, resulting in insufficient signal processing. Affect positioning accuracy

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