TRANSMITTING METHOD AND SYSTEM FOR PERFORMANCE OF CLOSED LOOP MIMO USING PREDEFINED PRECODING MATRIX WITH TWO UNITARY MATRIX

摘要

The present invention is the data of the closed-loop MIMO system using a precoding matrix that is composed of two unitary matrices relates to a transmission method and transmission apparatus for this purpose. ; To this end, the present invention is selected by a number of pre-coding vector of the mobile terminal contained in the pre-coding matrix is defined as a combination of two unitary matrices receiving two or more pre-coding vector from the mobile terminal, selection of the two pre-coding vectors of the two or more pre-coding vector is received, setting each of the two or more transmit antennas to transmit the downlink data and receiving the forward data from one mobile terminal to receive a feedback signal and the pre-coding vector containing the encoding level value, by changing the modulation scheme and coding rate according to the coding level value, provides a data transmission method in a closed-loop MIMO scheme for transmitting data on the forward The. ; According to the present invention, without increasing the amount of feedback data from a closed-loop MIMO scheme, a signal to interference can be expected performance improvements, such as to obtain the gain ratio.