Patent ID: 7421288

Claim:
A multi-antenna system, comprising a plurality of linearly connected antenna units, and a base station device connected to at least one of the antenna units, wherein: each antenna unit is combined with the other antenna units connected in a first or second direction to constitute a multi-antenna, and includes: a unit value addition unit adding number information of connected antenna unit input from the first direction by 1 unit; a connected number sending unit sending the number information of connected antenna unit having the 1 unit added thereto as number information of connected antenna unit in the second direction; a transmission/reception module transmitting/receiving a radio signal; an analog digital conversion unit convening the radio signal received from the transmission/reception module into reception digital data; a reception data addition unit adding together input digital data input from the first direction and the reception digital data; an added digital data sending unit sending the added digital data as input digital data in the second direction; a digital analog conversion unit convening transmission digital data input from the second direction into a transmission analog signal; a feeding unit feeding power of the transmission analog signal to the transmission/reception module; and a transmission data sending unit duplicating the transmission digital data input from the second direction and sending the duplicated data in the first direction; and the base station device includes: a computing unit generating a divided value obtained by dividing the input digital data input from the antenna unit by the number information of connected antenna units; a demodulation unit demodulating a reception signal from the divided value; and a modulation unit generating the transmission digital data.