Radio base station
A base station is a data communications station which is geographically fixed and which is typically made up of antennas, amplifiers, receivers, and transmitters, and similar hardware and software for sending and receiving signals and converting between radio frequency (RF) waves and audio signals. Cellular base stations form an important part of wireless communications. In a wireless communication system, a number of wireless base stations have respective service areas to which the service of each base station is provided, and the service areas of the wireless base stations are overlapped each other. The base station produces a radiation pattern defining a cell and/or sector in which the mobile terminal or the fixed wireless terminal operates. The radiation pattern enables the base station to transmit and receive signals of a single type. The base station is typically connected to a digital network. Wireless base stations have processors along with wired and wireless receivers and transmitters that receive and transmit information between mobile stations and base station controllers. Mobile terminals use transmitters and receivers to transmit and receive information to base stations. The digital network enables the base station to communicate with a mobile switching center within the wireless network. The mobile switching center sets up and connects calls between the mobile terminal and/or the fixed wireless terminal and a remote device. A base station transmitter in a mobile communications system transmits a high-power-level downlink signal to the mobile terminal within its coverage area. The transmit/receive switch, radio frequency section, sampling and reconstruction system, and signal processing module are all serially coupled together so as to transmit and receive signals over the air interface.
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