Optical wireless communications with low voltage self-powered sensor motes - art. no. 67090A

被引：3

作者：

O'Brien, Dominic C. ^{[1
]}

Liu, Jing-Jing ^{[1
]}

Yuan, Wei Wen ^{[1
]}

Faulkner, Grahame E. ^{[1
]}

Elston, Steve J. ^{[1
]}

Collins, Steve ^{[1
]}

机构：

[1] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England

来源：

FREE-SPACE LASER COMMUNICATIONS VII | 2007年 / 6709卷

关键词：

optoelectronic systems; optical wireless communications; retro-reflectors; sensor networks;

D O I：

10.1117/12.735599

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical wireless channels that use modulated retro-reflectors can provide low-data rate communications to self-powered 'smart-dust' motes. The retro-reflectors are illuminated using a base station that incorporates diffractive beamsteering to direct radiation onto the motes, and these return the radiation to an imaging receiver within the base station. The motes consist of a photodiode to provide power, a novel logarithmic receiver to receive data from the base station, and a modulating retro-reflector to send information from the mote to the base station. Several of the components elements of this system have been implemented and tested. In this paper we report a logarithmic receiver that can be self powered by the source communicating with it; and a retro-reflecting LC modulator component that operates at 30b/s when driven at 0.7V. In addition an overall system model, together with the challenges for future work are presented.

引用

页码：A7090 / A7090

页数：10

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