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Fiber-Optic Microcell Radio System with a Spectrum Delivery Switch
Hirofumi ICHIKAWA Hiroyuki OHTSUKA Takehiro MURASE
IEICE TRANSACTIONS on Electronics
Publication Date: 1993/02/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Optical/Microwave Interaction Devices, Circuits and Systems)
Category: Fiber Optic Radio Links
subcarrier optical transmission, frequency modulation, dynamic range, intermodulation distortion, diversity, microcell radio, multicarrier,
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This paper describes a fiber-optic microcell radio system with a spectral delivery switch to meet traffic demands. Optical link performance is discussed from the view points of link loss and noise figure aimed at system design. The theoretical carrier-to-noise ratio (CNR) performance is shown as a function of the input electrical power of the laser and the received optical power. Improvement of dynamic range defined by both CNR and intermodulation distortion is proposed by using the frequency modulation (FM) technique. The experimental results using the proposed technique indicate that the performance is much better than that of conventional methods. Moreover, economical diversity planning delivery methods over fibers are presented. This strategy will provide more cost effective and flexible networks.