Optical transmission system for radio access and high...

Details Optical transmission system for radio access and high... Optical transmission system for radio access and high...

2006-11-17

2008-03-25

Li, Shi K. (Department: 2613)

Optical communications

Hybrid communication system

C398S069000, C398S071000

Reexamination Certificate

active

07349634

ABSTRACT:
Modulators respectively modulate baseband signals into IF signals having different frequencies. Multiplexers multiplex the IF signals. A local oscillation signal source outputs a predetermined local oscillation signal. An external modulator intensity-modulates an optical signal using the local oscillation signal. An optical branching portion branches the intensity-modulated optical signal. Modulators respectively modulate the multiplexed IF signals onto the branched optical signals and then output the optical signals to radio base stations. Optical-electrical converters convert the optical signals into electric signals and antennas transmit the electrical signals to subscriber terminals.

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“Full-Duplex Fiber-Optic RF Subcarrier Transmission Using a Dual-Function Modulator/Demodulator” by Andreas Stohr et al., IEEE Trans, Microwave Theory Tech., vol. 47, No. 7, 1999.

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