Indoor Global Localisation in Anchor-based Systems using Audio Signals. (16th February 2016)

• Record Type: Journal Article
• Authors: Moutinho, João; Freitas, Diamantino; Esteves Araújo, Rui
• Is Part Of: Journal of navigation. Volume 69:Number 5(2016)
• Page Start: 1024
• Page End: 1040
• Publication Date: 2016-02-16
• Subjects: Indoor Global Localisation, -- Spread Spectrum, -- Echo Hiding, -- Golay Codes; Navigation -- Periodicals; 623.8905
• DOI: 10.1017/S0373463315001095
• Languages: English
• ISSNs: 0373-4633

Abstract

Abstract : This paper presents a method that allows mobile devices to be globally self-localised in indoor localisation systems by transmitting to them data from position reference anchors. The objective is to establish a reliable one-way down-link communication through signals used in the localisation process in a typically strong fading and multipath channel environment. This is accomplished by using signal processing techniques, including coding and forward error correction, to transmit data using a specific transmission control protocol. Experimental results, using audio as the signal between anchors and the mobile device, demonstrate successful data transmission in realistic scenarios like a common noisy and reverberant room. Spread spectrum noise-like masked signals 4·9 dB below background noise were sufficient to attain correct data reception at four metres distance between a loudspeaker anchor and a mobile device's microphone.