50-Mb/s diffuse infrared free-space link using on-off keying with decision-feedback equalization | IEEE Journals & Magazine | IEEE Xplore

50-Mb/s diffuse infrared free-space link using on-off keying with decision-feedback equalization


Abstract:

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 disto...Show More

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Abstract:

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-cm/sup 2/ Si p-i-n photodiode coupled to a high-index hemispherical concentrator, which is covered by an optical bandpass 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/sup -7/ BER.<>
Published in: IEEE Photonics Technology Letters ( Volume: 6, Issue: 10, October 1994)
Page(s): 1268 - 1270
Date of Publication: 06 August 2002

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First Page of the Article


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