Patent ID: 8204144

Claim:
A wireless communication system, comprising: a wireless communication apparatus which performs adaptive modulation for changing a modulation method and an encoding rate utilized for data of a data channel, by using the data channel and a control channel for transmitting control information to be applied to the data channel, and where the wireless communication apparatus transmits/receives a signal via MIMO multiplexing, wherein: the control information includes first control information to be used for a MIMO stream separation process and second control information to be used for a process other than the MIMO stream separation process; the wireless communication apparatus holds a first control information table describing selections of the first control information and a second control information table describing selections of the second control information; the selections in the second control information table are changed to correspond to first control information selected in the first control information table; and the wireless communication apparatus is configured to: determine the first control information, at an update timing set for the first control information, by referring to the first control information table; determine candidate selections of the second control information based on the determined first control information; and select one of the candidate selections of the second control information, at an update timing set for the second control information.