Patent ID: 8750399

Claim:
A radio terminal to perform radio communication by using a plurality of antennas, comprising: a receiving unit which receives information on a first modulation scheme applied to a first signal that a transmission apparatus transmits to the radio terminal, together with a second signal to another radio terminal, with multi-user multiple-input and multiple-output (MU-MIMO) techniques; a maximum likelihood detection unit which performs maximum likelihood detection of a received signal by using a plurality of possible combinations of the first modulation scheme indicated by the received information and a different one of a plurality of second modulation schemes applicable to the second signal transmitted to said another radio terminal; an estimation unit which estimates which one of the second modulation schemes is being applied to the second signal, based on a plurality of values representing predetermined information which are obtained in the maximum likelihood detection performed for the plurality of possible combinations of the first and second modulation schemes; and a controller which configures the maximum likelihood detection unit to perform maximum likelihood detection to obtain the first signal from the received signal, by using the estimated second modulation scheme in addition to the indicated first modulation scheme.