| 摘要 |
PURPOSE: A transceiver system in a WLL(Wireless Local Loop) base station is provided to expand a service area of a base station without change of an antenna, and reduce a mutual interface by a radio wave in the service area. CONSTITUTION: A base band signal processing part(100) modulates a transmission signal to an intermediate radio frequency signal, and converts an intermediate low frequency signal to a low frequency signal that can be processed in the transceiver system. A radio frequency modulation part(110) modulates the intermediate radio frequency signal to a signal having a radio frequency band which can be sent to a free space. An output amplification part(120) amplifies the radio frequency signal. An array antenna system(130) includes a bilateral communication unit, an array antenna part(150) and an antenna controller(160). The unit(140) sends the radio frequency signal received to the free space, and receives a signal from the free space.
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