RECEIVER IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM FOR LOWERING COMPUTATIONAL COMPLEXITY WHEN PERFORMING FAST FOURIER TRANSFORM OF THE RECEIVER IN THE ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM AND A SIGNAL PROCESSING METHOD THEREOF

摘要

PURPOSE: A receiver in an OFDMA(Orthogonal Frequency Division Multiple Access) system and a signal processing method thereof are provided to reduce the power consumption of a terminal.;CONSTITUTION: An extracting unit(440) extracts a user signal vector about a sub-carrier allocated to a receiver from a reception signal vector received from a transmitter. An FFT(Fast Fourier Transform) unit(450) performs FFT of the user signal vector. The extracting unit extracts the user signal vector by a circular convolution of the reception signal vector and the extracted user signal vector.;COPYRIGHT KIPO 2013;[Reference numerals] (410) Sampling unit; (420) A/D conversion unit; (430) S/P conversion unit; (440) Extracting unit; (450) FFT unit; (460) Symbol extracting unit;