| 摘要 |
PURPOSE: A device for expanding a repeater is provided to offer diversity to a PRU(Pico BTS(Base Transceiver Subsystem) Remote Unit) and the repeater irrespective of the number of PRUs and the type of the repeater. CONSTITUTION: The first DC(Directional Coupler) combining unit(100) attenuates a forward transmission signal inputted from the first PRU by a uniform level, and outputs the attenuated forward transmission signal. The first DC combining unit(100) attenuates an inputted reverse reception signal by the uniform level, and outputs the attenuated reverse reception signal to the first PRU. The second DC combining unit(110) attenuates a forward transmission signal inputted from the second PRU by a uniform level, and outputs the attenuated forward transmission signal. The second DC combining unit(110) attenuates an inputted reverse reception signal by the uniform level, and outputs the attenuated reverse reception signal to the second PRU. The third DC combining unit(120) outputs a forward transmission signal inputted from the third PRU, and outputs one among inputted reverse reception signals to the third PRU. The first repeater combining unit(130) divides the forward transmission signal inputted from one among the first to third DC combining units(100,110,120), and outputs the divided forward transmission signals to at least one repeater. The second repeater combining unit(140) attenuates a reverse reception signal inputted from one among repeaters by a uniform level, divides the attenuated reverse reception signal, and outputs the divided reverse reception signals to the second and third DC combining units(110,120). The third repeater combining unit(150) attenuates a reverse reception signal inputted from one among the repeaters by a uniform level, divides the attenuated reverse reception signal, and outputs the divided reverse reception signals to the first and second DC combining units(100,110).
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