Airborne ultrasonic communications using multiple parallel channels

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dc.check.embargoformatNot applicableen
dc.check.infoNo embargo requireden
dc.check.opt-outNot applicableen
dc.check.reasonNo embargo requireden
dc.check.typeNo Embargo Required
dc.contributor.advisorWright, William M. D.en
dc.contributor.authorJiang, Wentao
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2017-05-04T11:01:48Z
dc.date.available2017-05-04T11:01:48Z
dc.date.issued2016
dc.date.submitted2016
dc.description.abstractConcerns still exist over the safety of prolonged exposure to radio frequency (RF) wireless transmissions and there are also potential data security issues due to remote signal interception. Airborne ultrasound may be used as an alternative to RF for indoor wireless communication systems for securely transmitting data over parallel channels at short ranges. This thesis describes the design and evaluation of an airborne ultrasonic communication system using capacitive transducers. In this study, basic digital modulation schemes, such as ON-OFF keying (OOK) and binary phase-shift keying (BPSK), were implemented successfully over multiple parallel channels for data transmission over an air gap of up to 10 m with wireless synchronization using ultrasonic means. A simulation model that can precisely predict ultrasonic signals through the air channel was also created to help with signal characterisation. To further improve the bandwidth efficiency and eliminate the need for filtering, quadrature amplitude modulation (QAM) using orthogonal frequency division multiplexing (OFDM) method was investigated. The recorded data rate was 800 kb/s at 0.7 m with no measurable errors using prototype broadband ultrasonic transducers, and 180 kb/s at 6 m using relatively narrowband commercially available transducers. This thesis has also looked at implementing an indoor communication network with ceiling-mounted base stations and a mobile communicator for practical applications. An asynchronous ultrasonic location technique using Gold Code modulated ranging signals was chosen to optimise the modulation schemes, and offer automatic handover between different cell regions on a switch on and off basis as all base stations use the same frequency bands for data transmission.en
dc.description.sponsorshipScience Foundation Ireland (Research Frontiers Programme Grant 11/RFP.1/ECE/3119)en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Version
dc.format.mimetypeapplication/pdfen
dc.identifier.citationJiang, W. 2016. Airborne ultrasonic communications using multiple parallel channels. PhD Thesis, University College Cork.en
dc.identifier.endpage195en
dc.identifier.urihttps://hdl.handle.net/10468/3913
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2016, Wentao Jiang.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectAirborne ultrasonic communicationen
dc.subjectOrthogonal frequency division multiplexingen
dc.subjectCapacitive ultrasonic transduceren
dc.thesis.opt-outfalse
dc.titleAirborne ultrasonic communications using multiple parallel channelsen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePHD (Engineering)en
ucc.workflow.supervisorbill.wright@ucc.ie
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