Patent ID: 7352689

Claim:
A method for optimizing a phase factor for each sub-block signal in a partial transmit sequence orthogonal frequency division multiplexing system, comprising the steps of: a) initializing sub-block signals by applying an initial phase factor to the sub-block signals in all sub-blocks; b) setting a reference peak value with a peak value of a signal formed by combining the sub-block signals whose phase factors are selected in the step a); c) selecting a phase value that minimizes the peak value of an output signal as the phase factor of each sub-block by applying a next phase value to each sub-block signal as the phase factor; and d) repeating the step c) with respect to the remaining available phase values, wherein in the step c), performing bit reversion of a binary number and generating a bit-reversion number; and setting the phase value corresponding to the bit-reversion number as a phase factor in accordance with the order of the bit-reversion number.