METHOD OF THE INTERPOLATION OF SUB-CARRIER AT A CHANNEL-CHANGE RATE IN MIMO-OFDM SYSTEM

摘要

A method for interpolating a sub-carrier at an MIMO-OFDM(Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing) according to a channel change rate is provided to reduce a bit error rate in comparison with an interpolation method to uniformly determine a position of the sub-carrier regardless of the channel change rate. A method for interpolating a sub-carrier at an MIMO-OFDM according to a channel change rate includes the steps of: determining an interval between adjacent sub-carriers by using a first cost function to determine the sub-carrier fed back according to the channel change rate at a receiving stage(S10); and determining the position of the sub-carrier as a greatest feature value at the noise power and a channel matrix by using a second cost function guided by determining a pre-code matrix at the receiving stage.