| 摘要 |
A closed-loop MIMO system includes a receiver for forming a new predefined set by using elements of a previous predefined set, selecting a certain matrix of the new predefined set, and feeding back an index of the matrix, if the number of transmit antennas increases, and a transmitter for performing signal transmission by multiplying the matrix of the fedback index to a transmission signal. Although the number of transmit antennas increases, candidate matrices can be simply obtained by using candidate matrices of a previous set. Moreover, by proposing a reference for selecting an optimal solution with a small amount of calculation, burden on a system can be considerably reduced.
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