UPLINK TIME AND FREQUENCY SYNCHRONIZATION METHOD FOR OFDMA BASED MOBILE COMMUNICATION SYSTEM

摘要

in accordance with the present invention , using a plurality of the preamble signal transmitting time of a base station and a terminal station / perpendicular to synchronize the frequency of a frequency division multiple access based communication system in the time / frequency synchronization method generates the preamble signal at each terminal, the time period and the frequency domain preamble signal according to the reference signal received from the base station transfer from and to compensate ; Separating the preamble signal received from the terminal in the base station, estimates the time and frequency synchronization errors for each terminal using the preamble signal received from each terminal, and corresponds to the estimated time and frequency synchronization error and transmits it to the terminal .