Patent ID: 8681886

Claim:
A communication apparatus for use in a mobile communication system that uses a MIMO scheme and an adaptive modulation channel coding scheme, comprising: a signal detection unit configured to calculate a reference signal quality for each stream determined by a signal detection method which is different from a maximum likelihood estimation method; a data modulation scheme selection unit configured to determine a data modulation scheme for each stream of the reference signal quality; a correction value calculation unit configured to determine a correction value according to an interference amount which each stream receives from other stream, based on the reference signal quality and the data modulation scheme of each stream; an adding unit configured to determine a signal quality for rate determination for each stream by adding the reference signal quality and the correction value of each stream; and a rate calculation unit configured to determine a channel coding rate corresponding to the signal quality for the rate determination for each stream, wherein the determined data modulation scheme and channel coding rate are used for transmission.