This thesis work researches the theory and application
of systems performing omnidirectional, non-direct
path optical data communication (ONP systems). Such
systems are characterized by 1) the communication involves
a local, usually circular area; 2) Obstacles are allowed
between a transmitter and the receivers. This is in
contrast to the point-to-point and line-of-sight
communications performed by almost all existing infrared
data communication or transmission systems. The
elimination of the point-to-point limitation makes ONP
systems suitable for optical local area networking.
The feasibility of ONP systems employing infrared
LEDs and silicon photo detectors has been analyzed and the
performance of such systems predicted. The analysis shows
that indoor ONP systems are both feasible and practical.
Only a few LEDs are required to cover the entire area of a
large room.
Efforts have been made in finding rules for optimal
design of the ONP systems. A set of design criteria and
curves have been established.
The theoretical analysis has been verified in a
successful experiment done with OptoNet, an ONP infrared
datalink for local area networks. This experimental system
consists of two identical communication units employing
FSK modulation and microprocessor controllers. The
experiment has demonstrated that the ONP optical data
communications can be realized by relatively simple
electronic hardware. / Graduation date: 1991
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/38061 |
| Date | 05 December 1990 |
| Creators | Liu, Dongtai |
| Contributors | Herzog, James H. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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