RADIO FREQUENCY REPEATER USING TDD SYSTEM

摘要

A TDD(Time Division Duplexing) RF(Radio Frequency) repeater is provided to add a modem so as to speedily provide an alarm to a manager when an abnormal state occurs and to reduce manufacturing cost by modularizing a synchronization acquisition part, a control part, and the modem on a single board. A TDD RF repeater comprises the first antenna(180), the second antenna(190), an RF module(110), a control module(120), and a power supply part(130). The first antenna is provided to transmit and receive RF signals with a base station. The second antenna is provided to transmit and receive RF signals with a mobile terminal. The RF module amplifies a downlink signal received from the first antenna and transmits it to the second antenna. Also the RF module an uplink signal received from the second antenna and transmits it to the first antenna. The control module acquires synchronization from a downlink signal transmitted from the base station and sequentially establishes the downlink path and uplink path of the RF module on the basis of the acquired synchronization. The power supply part supplies power to the RF module and the control module.