Semi-Autonomous Coordinate Configuration Technology of Base Stations in Indoor Positioning System Based on UWB

Abstract

In the global positioning system (GPS) denied environment, an indoor positioning system based on ultra-wide band (UWB) technology has been utilized for target location and navigation. It can provide a more accurate positioning measurement than those based on received signal strength (RSS). Although promising, it suffers from some shortcomings that base stations should be preinstalled to obtain reference coordinate information, just as navigation satellites in the GPS system. In order to improve the positioning accuracy, a large number of base stations should be preinstalled and assigned coordinates in the large-scale network. However, the coordinate setup process of the base stations is cumbersome, time consuming, and laborious. For a class of linear network topology, a semi-autonomous coordinate configuration technology of base stations is designed, which refers to three conceptions of segmentation, virtual triangle, and bidirectional calculation. It consists of two stages in every segment: Forward and backward. In the forward stage, it utilizes the manual coordinate setup method to deal with the foremost two base stations, and then the remaining base stations autonomously calculate their coordinates by building the virtual triangle train. In the backward stage, the reverse operation is performed, but the foremost two base stations of the next segment should be used as the head. In the last segment, the last two base stations should be used as the head. Integrating forward and backward data, the base stations could improve their location accuracy. It is shown that our algorithm is feasible and practical in simulation results and can dramatically reduce the system configuration time. In addition, the error and maximum base station number for one segment caused by our algorithm are discussed theoretically.

Design and Implementation of an Indoor Warning System with Physiological Signal Monitoring for People Isolated at Home

“…This section briefly introduces commonly used indoor positioning technologies on the market and compares their advantages and disadvantages shown in Table 1. [29,30] High penetrability, low power consumption, little influence by multipath effect, high safety factor, lower system complexity, and high positioning accuracy.…”

“…To achieve indoor positioning, multiple access points are required, and therefore not suitable for general household use. Ultra wideband (UWB) [29,30] High penetrability, low power consumption, little influence by multipath effect, high safety factor, lower system complexity, and high positioning accuracy.…”

“…UWB technology is a new wireless communication technology that has emerged in recent years and is very different from traditional communication technology [29,30]. Compared to conventional communication systems, it does not use carriers but transmits data by sending and receiving very narrow pulses in nanoseconds or microseconds and thus has a bandwidth of 3.1~10.6 GHz.…”

Review on Tunnel Communication Technology

“…) is a kind of non-contact automatic identification technology. Its basic principle is the use of radio frequency signal and space coupling (inductive or electromagnetic coupling) or the transmission characteristics of radar reflection, to achieve the automatic identification of the identified object [79][80][81].…”