Patent ID: 7110387
Filing Date: 2006-09-19
Classification: H04L

Abstract:
1. A timing error compensation system in an OFDM/CDMA communication system said OFDM/CDMA communication system including an analog-to-digital converter which converts an OFDM signal to a digital OFDM symbol stream using sampling synchronization; a data symbol stream received from a transmitter, in which a pilot symbol is inserted at intervals of a predetermined number of data symbols; a guard interval remover for removing a guard interval inserted in the OFDM symbol using frame synchronization; and a fast Fourier transform (FFT) device for performing fast Fourier transform on the guard interval-removed OFDM symbol and outputting a data symbol stream; said timing error compensation system comprising: a pilot symbol detector which receives the data symbol stream and detecting the pilot symbols inserted in the data symbol stream at predetermined intervals in a symbol unit; and a timing compensator which determines a linear phase difference line for the detected pilot symbol using the pilot symbol and a reference symbol previously known by the receiver, generates a timing error estimation signal according to the determined linear phase difference line, and provides the timing error estimation signal to the analog-to-digital converter and the guard interval remover so as to determine the sampling synchronization and the frame synchronization.