DocumentCode
957703
Title
Wireless in-house data communication via diffuse infrared radiation
Author
Gfeller, Fritz R. ; Bapst, Urs
Author_Institution
IBM Zurich Research Laboratory, Rüschlikon, Switzerland
Volume
67
Issue
11
fYear
1979
Firstpage
1474
Lastpage
1486
Abstract
A novel wireless broadcast/multi-access channel is described for flexibly interconnecting a cluster of data terminals located within the same room. The transmission medium is diffusively scattered infrared radiation at 950-nm wavelength. Transmission is low-to-medium speed and the range up to 50 m. Theoretical analysis indicates that the time dispersion limits the transmission bandwidth of the system to 260 Mbit ċ m/s, but background noise produced by ambient daylight reduces the transmission speed below 1 Mbit/s. The transmission properties of the diffuse optical channel are analyzed, and experimental digital links for baseband PCM at 125 kbit/s and PSK 64 kbit/s are demonstrated.
Keywords
Background noise; Bandwidth; Baseband; Broadcasting; Data communication; Optical fiber communication; Optical noise; Optical scattering; Phase change materials; Wireless communication;
fLanguage
English
Journal_Title
Proceedings of the IEEE
Publisher
ieee
ISSN
0018-9219
Type
jour
DOI
10.1109/PROC.1979.11508
Filename
1455777
Link To Document