Adaptive phase shift apparatus and method

An adaptive phase shift apparatus for a multi-carrier system, comprising:

• a processor and a memory storing computer software, the memory coupled to the processor, the processor executing the computer software, the processor including:
• a new phase generator, configured to generate a group of one or more new phase values for corresponding one or more phase shift carriers (PSCs) based on quantization phase values, wherein generating the group of one or more new phase values comprises identifying each phase value of the group of one or more new phase values in a phase quantization look up table containing phase values of equal portion of 360 degree;
• a max power comparison unit, configured to calculate and compare, in real-time duration transmission, a backward maximum power in an evaluation path based on the group of one or more new phase values in a timeslot and a forward maximum power in a working path based on current phase values in the timeslot;
• and
• a forward phase shift unit, configured to adjust phases of the corresponding one or more PSCs based on the group of one or more new phase values if the calculated backward maximum power is less than the calculated forward maximum power,
• wherein the adjustment is to reduce data peak-to-average power ratio of the multi-carrier system.

A base station comprising:

• an adaptive phase shift apparatus for a multi-carrier system, the adaptive phase shift apparatus comprising a processor and a memory storing computer software, the memory coupled to the processor, the processor executing the computer software, the processor including:
• a new phase generator, configured to generate a group of one or more new phase values for corresponding one or more phase shift carriers (PSCs) based on quantization phase values, wherein generating the group of one or more new phase values comprises identifying each phase value of the group of one or more new phase values in a phase quantization look up table containing phase values of equal portion of 360 degree;
• a max power comparison unit, configured to calculate and compare, in real-time during transmission, a backward maximum power in an evaluation path based on the group of one or more new phase values in a timeslot and a forward maximum power in a working path based on current phase values in the timeslot;
• and
• a forward phase shift unit, configured to adjust phases of the corresponding one or more PSCs based on the group of one or more new phase values if the calculated backward maximum power is less than the calculated forward maximum power,
• wherein the adjustment is to reduce data peak-to-average power ratio of the multi-carrier system.