Using such repeater, the local unit will receive RF signal from the Base Station Coupler port, in the local unit, the RF signal frequency will be shifted to a new frequency. Between local unit and remote unit, the signal will be transmitted in the shifted frequency, when the frequency-shifting signal has been received by remote unit, it will be shifted to the signal whose frequency is the same as Base station RF signal’s, after that ,the RF signal will be amplified to cover the blindness area by the antenna of remote unit.