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dc.contributor.convenorElfed Lewisen_US
dc.contributor.authorHagem, Rabeeen_US
dc.contributor.authorThiel, Daviden_US
dc.contributor.authorO'Keefe, Stevenen_US
dc.contributor.authorWixted, Andrewen_US
dc.contributor.authorFickenscher, Thomasen_US
dc.contributor.editorElfed Lewisen_US
dc.description.abstractThis paper reports 3 axis accelerometer data transfer over a one meter underwater path at 10 cm depth using a 2400 bps optical wireless frequency shift keying (FSK) at very low frequency (VLF). The modulation frequencies used were 10 and 12 KHz. The prototype modem was designed and implemented for real time feedback for swimmers in the pool. The optical transmitter included an accelerometer unit with a microcontroller, the modulator and a detector circuit based on an integrated detector preamplifier (IDP). The cost of the components for the optical transmitter and receiver was less than AU$25. Range experiments were performed in air and underwater, with and without bubbles. The received data was error free for 1.3 m in air and for more than 1.1 m underwater without bubbles. The underwater range decreased to 70 cm with bubbles. The availability of the link between the wrist and head of a swimmer was approximately 50% and varied with the position of the wrist. This enables stroke rate data to be presented to the swimmer via a goggle mounted display.en_US
dc.publisherIEEE Pressen_US
dc.publisher.placeUnited Statesen_US
dc.relation.ispartofconferencenameIEEE Sensorsen_US
dc.relation.ispartofconferencetitleIEEE Sensors 2011 Conference Proceedingsen_US
dc.relation.ispartoflocationLimerick, Irelanden_US
dc.subject.fieldofresearchOptical Networks and Systemsen_US
dc.titleLow-cost short -range wireless optical FSK modem for swimmers feedbacken_US
dc.typeConference outputen_US
dc.type.descriptionE2 - Conference Publications (Non HERDC Eligible)en_US
dc.type.codeE - Conference Publicationsen_US
gro.facultyGriffith Sciences, Griffith School of Engineeringen_US
gro.hasfulltextNo Full Text

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    Contains papers delivered by Griffith authors at national and international conferences.

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