Patent ID: 8009764

Claim:
A method of diminishing peak to average power ratio (PAPR) in an OFDM or OFDMA communication system, the method comprising: a first step of circularly shifting each of at least two data sequences that have been converted to a time domain from a frequency domain according to first circular shift information to generate at least two circularly shifted data sequences, wherein circularly shifting each of the at least two data sequences comprises: storing each of the at least two data sequences, and outputting each of the stored at least two data sequences according to the circular shift information; a second step of combining the at least two circularly shifted data sequences to generate a combined data sequence; a third step of calculating the PAPR of the combined data sequence; and a fourth step of outputting an entire combined data sequence corresponding to a specific PAPR selected from a plurality of PAPRs calculated by repeating the first, second, and third steps at least once using circular shift information that is different from the first circular shift information.