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IEICE TRANSACTIONS on Communications

Performance Improvement in Optical Fiber Feeders for Microcellular Mobile Radio Systems

Makoto SHIBUTANI, Wataru DOMON, Katsumi EMURA

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Summary :

This paper reports performance improvement in an optical fiber feeder for microcellular mobile radio systems. A low noise optical receiver using a transformer resonant circuit is described. With this receiver, CNR degradation due to receiver noise is suppressed to less than 0.9dB. Furthermore, two novel techniques, the use of a multiple-LD transmitter and automatic LD input level control, are proposed. The multiple-LD transmitter increases transmitter output power and reduces the transmitter noise. With a dual-LD transmitter, it is possible to increase the optical loss margin by 3.1dB, which corresponds to transmission length expansion of 6.2km, or to improve the received CNR by 2.8dB, which enables communication range expansion. Automatic LD input level control, which optimizes LD input level according to the received radio power, can expand the actual dynamic range of the up link.

Publication
IEICE TRANSACTIONS on Communications Vol.E76-B No.9 pp.1145-1151
Publication Date
1993/09/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Fiber-optic Microcelluler Radio Communication System and Their Technologies)
Category
Equipment and Device Matters

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