Feasibility studies on an optical fiber feeder system for microcellular mobile communication systems

The optical fiber feeder system is a wideband and low-loss radio signal feeder system for use between a base station (BS) and micro-base stations (micro-BSs). This system can realize very compact micro-BSs and easy radio channel assignment control in the BS. Calculations and experiments confirmed that the optical feeder can transmit a 1.5 GHz band digital mobile telephone signal, composed of five carriers (pan-European GSM-type eight-channel TDM), through 20 km of optical fiber with more than 75 dB CNR and less than -80 dBc intermodulation distortion.<
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