Performance Analysis of Fiber-Optic Millimeter-Wave Band Radio Subscriber Loop (Special Issue on Fiber-optic Microcelluler Radio Communication System and Their Technologies)

概要

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This paper proposes a new subscriber distribution method called FTTA (Fiber To The Area), which uses millimeter-wave radio band to connect subscribers with base station and optical fiber to connect base station with control station in order to obtain broad-band transmission. Usually two main causes of signal degradation, i.e., rainfall attenuation on radio channel and intermodulation distortion on optical channel are considered in this system. Taking into considerations of these two factors, we analyze the available capacity of FTTA system for various 2^<2n>QAM modulation levels. The analysis clarifies that there exists an optimum modulation level that can maxize the available capacity, and AGC circuit in the base station is useful to compensate the rainfall attenuation. It is shown that 18.0 Gbps is available under the optimum modulation method of the 64 QAM with AGC and 12.0 Gbps under the QAM without AGC when 20 carriers are used.
社団法人電子情報通信学会の論文
1993-09-25