APPARATUS AND METHOD FOR ELIMINATING FREQUENCY SYNCHRONIZATION ERROR IN RELAY WIRELESS COMMNICATION SYSTEM

摘要

The present invention relates to a wireless communication system of a relay method using Distributed Space Time Block Coding (DSTBC), which estimates a channel with each relay station and constructs an equivalent channel matrix in consideration of a space-time block coding code. An estimator to perform QR decomposition on the equivalent channel matrix, and a decomposer constituting an equalization matrix using the QR decomposition result, and equalizing the received signal by multiplying the received subcarrier-specific signal by the equalization matrix. Including an equalizer and a detector for detecting a subcarrier transmission signal using the equalized received signal and the R matrix obtained as a result of QR decomposition, it is possible to reduce overhead due to frequency offset estimation and improve frequency synchronization error cancellation performance. .;Relay station, Distributed Space Time Block Coding (DSTBC), QR decomposition, Decision Feedback Equalizer (DFE)