Patent ID: 7991066

Claim:
A method of controlling a multiple input multiple output (MIMO) system including a transmitter and a receiver using multiple antennas, the method comprising the steps of: estimating, at the receiver a MIMO channel and detecting data streams using a successive interference cancellation scheme; calculating, at the receiver, S and P satisfying the formula given below using the estimated MIMO channel and then feeding back information corresponding to [ p 1 , p 2 , . . . , p M-1 , SINR M s ] to the transmitter, p 1 + p 1 SINR 1 s = p 2 + p 2 SINR 2 s = … = p M + p M SINR M s ∑ 1 ≤ k ≤ M ⁢ p k = P wherein s represents a successive interference cancellation order, p represents transmission power per stream, SINR k s represents a signal-to-interference-plus-noise ratio (SINR) of a stream k when a signal of a stream prior to the stream k is completely removed, M represents an integer number of data streams, and P represents the power of the transmitter; and determining, at the transmitter, a data transmission rate and transmission power per stream using the fed-back information.