Apparatus and method for performing sequential scheduling in multiple-input multiple-output system

A method of feeding back channel information in a receiver of a communication system, the method comprising:

• when channel feedback information is requested by a base station, transmitting the channel feedback information to the base station;
• and
• when channel feedback information of a previously scheduled user is received from the base station, computing partial feedback information by using channel state information of the receiver and the channel feedback information of the previously scheduled user.

An apparatus for performing scheduling in a transmitter of a communication system, the apparatus comprising:

• a scheduler configured to select a user which reports the greatest partial feedback information among a plurality of pieces of partial feedback information of all users in an initialization operation and request channel feedback information from the selected user, and to broadcast the channel feedback information of the selected user to remaining unselected users upon receiving the channel feedback information from the selected user;
• and
• a feedback receiving unit configured to output, to the scheduler, partial feedback information received from unselected users and channel feedback information received from the selected user.

An apparatus for feeding back channel information in a receiver of a communication system, the apparatus comprising

• a channel estimator configured to transmit the channel feedback information to the base station when channel feedback information is requested by a base station, and to compute partial feedback information by using channel state information of the receiver and the channel feedback information of a previously scheduled user when channel feedback information of the previously scheduled user is received from the base station.