METHOD AND APPARATUS FOR TRANSMITTING UPLINK ACKNOWLEDGEMENTINFORMATION IN AN OFDMA COMMUNICATION SYSTEM

摘要

A method and apparatus for transmitting uplink acknowledge information (ACK) in a communication system using an orthogonal frequency division multiple access (OFDMA) scheme. The method includes receiving a data bit for the upli nk ACK; outputting codewords corresponding to the data bit; performing quadratu re phase shift keying (QPSK) modulation on symbols for ACK vector indexes corresponding to the codewords for the received data bit; performing inverse fast Fourier transform (IFFT) on a transmission signal having subcarrier clusters to which the modulated transmission symbols are allocated; and transmitting the IFFT-processed transmission signal.