MULTI-INPUT MULTI-OUTPUT COMMUNICATION METHOD AND MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEM OF ENABLING THE METHOD

摘要

A multi-input multi-output communication method and a multi-input multi-output communication system using the same are provided to improve a communication system by correcting channel quality information fed back from a user terminal in consideration of the number of the user terminals or a transmission rank. A multi-input multi-output communication system includes a first CQI receiver(310), a second CQI generator(320), a beam forming mode decision part(330), an MCS level selection part(340) and a beam former(350). The first CQI receiver receives the first channel quality information relating to the beam forming vector which the user terminal selects fed back from the user terminal. The second CQI generator produces the second channel quality information correcting the first channel quality information in consideration of the transmission rank relating to the number of data streams. The MCS(Modulation Coding Scheme) level selection part selects the MCS level complying with the radio channel by using the second channel quality information. The second channel quality information displays the radio channel accurately than the correction of the first channel quality information fed back by the user terminal.