APPARATUS AND METHOD FOR MINIMIZING PAPR(PEAK TO AVERAGE POWER RATIO) IN COMMUNICATION SYSTEM USING OFDM METHOD

摘要

PURPOSE: An apparatus and a method for minimizing a PAPR(Peak to Average Power Ratio) in a communication system using an OFDM method are provided to minimize the PAPR by transmitting a dummy sequence instead of a transmitting signal when the PAPR of a transmitting signal excesses a threshold value. CONSTITUTION: A sub-band divider(119) is used for dividing information data sub carrier signals into sub-band signals. An additional information insertion unit inserts additional information sub-carrier signals into the information data sub-carrier signals. A dummy sequence insertion unit(123) inserts dummy sequences into the corresponding sub-bands. An IFFT(129) is used for generating the 10th FDM symbol signal by using the additional information sub-carrier signals and sub-band signals without dummy sequences and generating the 20th FDM symbol signal by using the additional information sub-carrier signals and the sub-band signals. A controller(125) is used for performing a control operation to transmit the 20th FDM symbol signal through a downlink when a PAPR of the 10th FDM symbol signal excesses a threshold value.