Method for optimizing phase factor of sub-block signal in partial transmit sequence orthogonal frequency division multiplexing system

A computer-readable recording medium containing instructions for executing a method for optimizing a phase factor for each sub-block signal in a partial transmit sequence orthogonal frequency division multiplexing system, that, when executed, cause a machine to:

• (a) initialize sub-block signals by applying an initial phase factor to the sub-block signals in all sub-blocks;
• (b) set 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) select 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) repeat the step (e) with respect to the remaining available phase values, wherein in the step (c), the phase factor is determined by further causing the machine to:
• perform bit reversion of a binary number and generating a bit-reversion number;
• and set the phase value corresponding to the bit-reversion number as a phase factor in accordance with the order of the bit-reversion number.

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), a temporary peak value of a signal is obtained by subtracting the sub-block signal having the previous phase factor from the previously combined signal and adding the sub-block signal having a new phase factor to the previously combined signal, only for the sub-block signal that the phase factor is changed.