Real time locating method for supporting TDOA (Time Difference Of Arrival), TOA (Time Of Arrival) and RSSI (Receive Strength Signal Indicator) modes

Abstract

The invention discloses a real time locating method for supporting TDOA (Time Difference Of Arrival), TOA (Time Of Arrival) and RSSI (Receive Strength Signal Indicator) modes. The method comprises the following steps of: (1) providing a locating label and a locating access point utilizing a microwave frequency range; (2) realizing real time locating and tracking of a target through real time locating embedded software and a signal processing algorithm; and (3) completing virtual door control, linear and planar locating algorithms and locating simulation software. In order to meet complex locating requirements on physical distribution processes, the invention realizes the real time locating method for supporting three main locating modes of the TDOA, the TOA and the RSSI and has the advantages of low power consumption, and suitability for door control, linear and planar locating application.

Description

technical field [0001] The invention relates to a real-time positioning method, in particular to a real-time positioning method supporting three modes of TDOA, TOA and RSSI. Background technique [0002] Real Time Location System (RTLS) refers to a system that locates and tracks targets in real time in a designated space (office building, site, urban area) through software and wireless communication technology. With the rapid development of science and technology, people pay more and more attention to positioning services, such as the Global Positioning System (GPS) and active RFID based on area queries, which have been widely used in many fields. However, due to technical defects, these existing technologies cannot be applied to many occasions that require precise positioning. The GPS system that began in the late 1970s is difficult to apply to indoor places such as factories, warehouses, and buildings because it needs to receive satellite signals. Due to the cost of reali...

AI Technical Summary

Problems solved by technology

However, due to technical defects, these existing technologies cannot be applied to many occasions that require precise positioning. The GPS system that began in the late 1970s is difficult to apply to indoor places such as factories, warehouses, and buildings because it needs to receive satellite signals. Due to the cost of realizing precise positioning, the GPS system has not been widely applied to the fields of ports, terminals, warehousing and logistics, etc.

In order to make up for these shortcomings, active RFID technology based on rough area query was born in the United States after 2000. Although it has considerable advantages in cost, its application range is greatly limited due to its low positioning accuracy.

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