Fujitsu Corporation

Takahito Hashigami

Toshiaki Funakubo

A base transceiver station (BTS) identifies the number of currently connected antenna units by receiving a signal to which 1 is added in each antenna unit via a signal line () connecting the antenna units (AUto AUn) in series. The target output power of each antenna unit, which is obtained by dividing the total target output power of the antenna units by the number of currently connected antenna units, is passed to each antenna unit via a signal line () connecting the antenna units in series. Each antenna unit controls the gain of a variable gain amplifier so that its output power becomes equal to the target output power.

Amplifier gain control method and apparatus in multi-antenna radio system

In a wireless mobile communication system, functions of a base transceiver station is divided and served by transmission/reception devices for communicating with mobile stations, and a signal processing device for performing base band signal processes of a plurality of channels. A plurality of transmission/reception devices and a plurality of signal processing devices are connected via a communication network. Thereby, connection relationships among the transmission/reception devices and the signal processing devices can be flexibly changed.

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Kawasaki, Japan

Takahito Hashigami