Patent ID: 8437787

Claim:
A mobile communication system comprising: a mobile communication device; and a base station device that performs wireless communication with the mobile communication device, wherein the mobile communication device comprises: a plurality of antennas: a plurality of transmitting units; a plurality of receiving units; and a baseband processing unit that selects, based on an instruction received from the base station device through the plurality of antennas and the plurality of receiving units, one of the plurality of transmitting units and one of the plurality of antennas to be used for transmitting data signals, the baseband processing unit transmitting the data signals to the base station device through the one of the plurality of transmitting units and the one of the plurality of antennas, and the baseband processing unit transmitting reference signals having a predetermined value to the base station device through the plurality of transmitting units and the plurality of antennas, wherein the reference signals are transmitted alternately from at least one of the plurality of antennas currently sending data and at least one of a plurality of idle antennas, wherein the reference signals are always transmitted from the at least one of the plurality of antennas sending data by using a symbol block belonging to the same resource block to which data signals are being sent; and wherein when the reference signals are transmitted from the at least one of the plurality of idle antennas, the reference signals are allocated to at least a symbol block other than the symbol block corresponding to the same resource block in which data is being transmitted from the at least one of the plurality of the antennas sending data; and the base station device comprises: an antenna; a transmitting unit; a receiving unit; and a baseband processing unit that transmits, to the mobile communication device through the transmitting unit and the antenna based on qualities of the reference signals received through the antenna and the receiving unit, a signal indicating information concerning which of the plurality of antennas and the plurality of transmitting units of the mobile communication device are used for transmitting the data signals, the signal also indicating information concerning whether or not to make the plurality of transmitting units and the plurality of antennas share transmission of each of the reference signals.