SSGP-based UWB positioning method in LOS/NLOS environment

Abstract

The invention belongs to the field of ultra wide band positioning, and particularly relates to an SSGP-based UWB positioning method in an LOS / NLOS environment, which comprises the following steps: a label sends a Poll message at a fixed interval, the Poll message is simultaneously sent to three base stations, and each base station respectively receives the Poll message in a corresponding signal receiving time period; each base station responds in the continuous response through the Resp message, and the label sends the Final messages received by all the base stations; the flight time of the label and each base station is calculated according to the timestamps carried in the base station and label receiving and sending messages, and the distance information between the base station and the label is calculated according to the time; according to the distance information, calculating position coordinates of the label based on a Taylor algorithm; the positioning method can adapt to various LOS / NLOS environments, reduces the original high complexity, and guarantees the high positioning precision.

Description

technical field [0001] The invention belongs to the field of ultra-wideband positioning, in particular to an SSGP-based UWB positioning method under the LOS / NLOS environment. Background technique [0002] With the development of the Internet of Things, people's demand for location services increases in their lives. Although GPS can provide better outdoor positioning outdoors, it is not suitable for indoor positioning. Therefore, researchers have developed many indoor positioning technologies: Bluetooth, WiFi and UWB, etc. Among these technologies, UWB has the characteristics of low power consumption and high positioning accuracy, and has good ability to resist multipath fading. UWB generally uses the time of arrival (TOA) method to estimate the distance in the ranging process. The performance of this method depends on the propagation environment of the UWB signal. However, the indoor positioning environment is complex. It is easy to form an NLOS environment. First, dire...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing UWB positioning technology needs to estimate the channel parameters, especially in the NLOS environment, the present invention proposes an SSGP-based UWB positioning method in the LOS / NLOS environment, including tags, base stations and the positioning system of the position calculation server for positioning, the positioning process includes the following steps:

Images