Cable broadcasting system, and head end unit and indoor unit to be used therein

Abstract

A cable broadcasting system having a simple structure, by which radio telephones can be used in good condition even inside a building, or at any other place where a subscriber's terminal is provided. An existing community receiving system for supplying, to a subscriber's terminal installed in each subscriber's home, broadcasting signals (90-1335 MHz) in VHF, UHF, and BS-IF bands received by respective outdoor antennas is provided with another outdoor antenna for radio waves in a radio telephone frequency band (1429.025-1919.45 MHz) used for cellular phones and PHS terminals, and a radio telephone repeater for transmitting/receiving the radio waves in the radio telephone frequency band. Furthermore, a head end unit in the system is provided with a mixer-extractor such that the signals transmitted/received by the radio telephone repeater can be relayed, via a tap device, to the subscriber's terminal. Consequently, the radio waves transmitted/received by the outdoor antenna can be transmitted/received between the radio telephones and an indoor antenna connected with the subscriber's terminal.

Dependencies are inferred from the claim text.