Wireless communications systems employing free-space optical com

Details Wireless communications systems employing free-space optical com Wireless communications systems employing free-space optical com

1997-02-13

1998-12-01

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359145, 359152, 359172, H04B 1000

Patent

active

058447059

ABSTRACT:
The cells of a wireless communications system can be subdivided into smaller subcells, in each of which the available radio frequencies can be re-used to allow denser use of the system. To avoid having to run hard-wired communications links to broadcast antennas of the subcells, substantially unguided, free-space, optical communication is used between the antenna that formerly served the cell and the subcell antennas. The existing hard-wired connection from the central antenna to the remainder of the wireless communications system infrastructure continues to be used for communication to and from the cell.

REFERENCES:
patent: 5067173 (1991-11-01), Gordon et al.
patent: 5301056 (1994-04-01), O'Neill
patent: 5493436 (1996-02-01), Karasawa et al.

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