AUTOMATIC GAIN CONTROL METHOD USING PREAMBLE IN RF REPEATER OF WIRELESS BROADBAND SYSTEM AND RF REPEATER THEREFOR

摘要

The present invention relates to an automatic gain control method using a preamble in the RF repeater of the WiBro system to control the automatic gain of the RF repeater in an OFDM-TDD type WiBro system and an RF repeater for the same.;When the reception level measuring device of the present invention receives the forward RF signal transmitted from the base station through the LNA, the reception level of the forward RF signal is measured and transmitted to the control unit, the control unit preamble of the RF signal transmitted from the RF repeater to the mobile communication terminal Level is calculated from the preamble level transmitted from the base station and received by the RF repeater to calculate the forward automatic gain control value and transmitted to the forward side variable attenuator, and the forward side variable attenuator reflects the forward automatic gain control value to adjust the RF signal level. By adjusting and transmitting the RF signal to the mobile communication terminal, the signal output of the RF repeater forward circuit can be adjusted to the repeater standard.;RF repeater