50-MB/S DIFFUSE INFRARED FREE-SPACE LINK USING ON-OFF KEYING WITH DECISION-FEEDBACK EQUALIZATION

被引:32
|
作者
MARSH, GW
KHAN, JM
机构
[1] Department of Electrical Engineering and Computer Sciences, University of California, Berkeley
关键词
D O I
10.1109/68.329659
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We report an experimental 50-Mb/s free-space infrared link for indoor wireless communication, which achieves low bit-error rates (BERs) in the presence of multipath distortion, shadowing, and ambient natural and artificial lighting. The eye-safe 806 nm transmitter, directed at the ceiling, emits an on-off-keyed signal having 475-mW average power. The receiver employs a 1-cm2 silicon p-i-n photodiode coupled to a high-index hemispherical concentrator, which is covered by an optical band-pass filter of 30-nm bandwidth. A decision-feedback equalizer mitigates the effect of multipath ISI. In the presence of bright skylight, the link achieves a range of 2.9 m at 10(-7) BER.
引用
收藏
页码:1268 / 1270
页数:3
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