Designs of a free-space white-LED mass-storage transceiver for SD-card file transfer

Author

Lih Chieh Png ; Nhat Le Minh ; Liangquan Chen ; Kiat Seng Yeo

Author_Institution

IC Design Centre of Excellence, Nanyang Technol. Univ., Singapore, Singapore

fYear

2012

fDate

3-7 Dec. 2012

Firstpage

1260

Lastpage

1263

Abstract

Two visible-light mass-storage prototypes have been constructed. They enable file transfers between the SD (Secure Digital) memory card and the PC via white-LED light. The entire system consists of a pair of identical white-LED transceivers: one is connected to the PC, whereas the other is connected to the SD-card subcircuit. File transfer operation is able to execute at 19200 bps. Prototype 1 is based on pulse-position modulation (PPM), while Prototype 2 is based on pulse-width modulation (PWM). It was found that the PPM design consumes less power and is more stable. Full-speed (12 Mbps) USB 2.0 VLC transceiver designs for slave and host devices are also included.

Keywords

light emitting diodes; memory cards; optical communication; optical modulation; optical transceivers; pulse width modulation; PC; SD-card file transfer operation; USB 2.0 VLC transceiver design; free-space white-LED mass-storage transceiver deisgn; host device; identical white-LED transceivers; pulse-position modulation; secure digital memory card; slave device; visible-light mass-storage prototypes; white-LED light; Clocks; Integrated circuits; Light emitting diodes; Prototypes; Pulse width modulation; Transceivers; Universal Serial Bus;

fLanguage

English

Publisher

ieee

Conference_Titel

Globecom Workshops (GC Wkshps), 2012 IEEE

Conference_Location

Anaheim, CA

Print_ISBN

978-1-4673-4942-0

Electronic_ISBN

978-1-4673-4940-6

Type

conf

DOI

10.1109/GLOCOMW.2012.6477762

Filename

6477762