Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-12-02
1999-08-10
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359136, 359173, 359143, 359179, H04B 1012
Patent
active
059367547
ABSTRACT:
A transmission system for backhauling CDMA signals from remote antennas to the centralized base station of a wireless communication system includes a laser transmitter and an optical receiver coupled to an optical fiber. Wireless signals are backhauled to the central base station without degrading signal quality, and with minimal signal processing performed at the remote antenna site. The RF drive current driving the laser transmitter is kept above a predetermined level to prevent noise caused by optical feedback into the laser transmitter caused by Rayleigh backscatter in the optical fiber. A method of testing the optical link is presented which avoids the expense of using a real CDMA system to test each link. The testing method enables the dynamic range of inexpensive, unisolated, uncooled lasers in the optical link to be increased so the optical link can cost-effectively backhaul the CDMA signals.
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Ariyavisitakul Sirikiat
Woodward Sheryl Leigh
AT&T Corp.
Pascal Leslie
LandOfFree
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