PILOT TRANSCEIVING DEVICE IN A COMMUNICATION SYSTEM USING A MULTI CARRIER MODULATION METHOD AND A METHOD THEREOF, SPECIFICALLY CONCERNED IN ACQUIRE TIME SYNCHRONIZATION AND FREQUENCY SYNCHRONIZATION

摘要

PURPOSE: A pilot transceiving device and a method in a communication system using a multi carrier modulation method are provided to transceive a pilot symbol having a type that two sequences having different lengths are repeated, thereby expanding a frequency offset which can be estimated for frequency synchronization acquisition, consequently an exact frequency synchronization can be acquired. CONSTITUTION: The first pilot sequence which is shorter than a set length is generated. The second pilot sequence different from the first pilot sequence is generated, and wherein the second pilot sequence is shorter than the set length. The first pilot sequence is repeated as much as preset frequency, and the second pilot sequence is repeated as much as set frequency. The repeated first and second sequences are combined together, to generate a pilot symbol. The pilot symbol is transmitted.