Patent ID: 8111775

Claim:
A communication device adopted for a multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) system, the MIMO-OFDM system comprising the communication device and a corresponding communication device that communicates with the communication device, the communication device comprising: a transceiving module, being configured to receive a channel state information (CSI) from the corresponding communication device, wherein the CSI comprises a first CSI of a first subcarrier and a second CSI of a second subcarrier; a singular value decomposition (SVD) operation module, being configured to perform a matrix SVD operation on a first channel matrix representing the first CSI to obtain a first beamforming matrix, a first singular value matrix and a first decoding matrix, and configured to perform a matrix SVD operation on a second channel matrix representing the second CSI to obtain a second beamforming matrix, a second singular value matrix and a second decoding matrix; and an interpolation operation module, being configured to perform an interpolation operation on the first beamforming matrix and the second beamforming matrix to obtain a third beamforming matrix of a third subcarrier that is located between the first subcarrier and the second subcarrier, and configured to perform an interpolation operation on the first decoding matrix and the second decoding matrix to obtain a third decoding matrix of the third subcarrier.