Publication

Low-cost optical-based indoor tracking device for detection and mitigation of NLOS effects

2009
Conference Papers

Abstract

The implementation of an image-based sensor device able to track people in an indoor environment is presented. The primary objective of this paper is to prove the feasibility of a sensor capable of sub-metre level tracking accuracy and costing approximately US$20. Additionally, the proposed device is a valid solution for wireless multipath detection and mitigation problems caused by non line of sight conditions for radio wireless positioning systems. Under ordinary conditions, the proposed device is shown to be able to locate moving objects with an accuracy of some decimetres and with a coverage capability of about 30 square metres.

Official source

https://infoscience.epfl.ch/entities/publication/e97298b1-0ffb-45e3-a82e-c188ded624b6

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2009
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e97298b1-0ffb-45e3-a82e-c188ded624b6

About this result

Related concepts (32)

Indoor positioning system

An indoor positioning system (IPS) is a network of devices used to locate people or objects where GPS and other satellite technologies lack precision or fail entirely, such as inside multistory buildings, airports, alleys, parking garages, and underground locations. A large variety of techniques and devices are used to provide indoor positioning ranging from reconfigured devices already deployed such as smartphones, WiFi and Bluetooth antennas, digital cameras, and clocks; to purpose built installations with relays and beacons strategically placed throughout a defined space.

Real-time locating system

Real-time locating systems (RTLS), also known as real-time tracking systems, are used to automatically identify and track the location of objects or people in real time, usually within a building or other contained area. Wireless RTLS tags are attached to objects or worn by people, and in most RTLS, fixed reference points receive wireless signals from tags to determine their location. Examples of real-time locating systems include tracking automobiles through an assembly line, locating pallets of merchandise in a warehouse, or finding medical equipment in a hospital.

Active-pixel sensor

An active-pixel sensor (APS) is an , which was invented by Peter J.W. Noble in 1968, where each pixel sensor unit cell has a photodetector (typically a pinned photodiode) and one or more active transistors. In a metal–oxide–semiconductor (MOS) active-pixel sensor, MOS field-effect transistors (MOSFETs) are used as amplifiers. There are different types of APS, including the early NMOS APS and the now much more common complementary MOS (CMOS) APS, also known as the CMOS sensor.

Related publications (30)

Low-cost optical-based indoor tracking device for detection and mitigation of NLOS effects

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