A divider/combiner unit combines RF signals, then converts the combined signal into an optical signal and sends it over an optical fiber. N radio access units each convert the optical signal received from the optical fiber into an RF signal and transmits it from an antenna, and each radio access unit...http://www.google.ca/patents/US20020048071?utm_source=gb-gplus-sharePatent US20020048071 - Communication system using optical fibers
