Optical data communication and location apparatus, system and me

Details Optical data communication and location apparatus, system and me Optical data communication and location apparatus, system and me

1995-09-21

1997-05-27

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

329313, 359185, 359186, 370213, 375239, H04J 1408

Patent

active

056337426

ABSTRACT:
An optical data communication and location apparatus for at least one location in a facility having at least one receiver at said at least one location. A plurality of portable transmitters provides optical wireless data links with the receiver. Each of the transmitters has a power supply with circuitry for transmitting data packets over said optical wireless data links to the receiver. The circuitry for transmitting data packets generates a data code having at least two time frames, each of the at least two times frames being divided into at least two data time slots. Each frame has exactly one pulse in one data time slot whereby in each data packet, there is encoded n-bits of binary data where 2.sup.n is equal to the number of time slots in each frame.

REFERENCES:
patent: 3767855 (1973-10-01), Ueno
patent: 4151407 (1979-04-01), McBride
patent: 4731785 (1988-03-01), Ferenc
patent: 5062151 (1991-10-01), Shipley
patent: 5394410 (1995-02-01), Chen
patent: 5402469 (1995-03-01), Hopper et al.

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