Peak power reduction method

A transmitting device comprising a peak power reduction circuit comprising:

• the peak power reduction circuit comprising:
• a synthesized signal generating unit generating synthesized signals in a time domain from input signals in a system for transmitting batchwise the signals taking different modulation methods;
• a peak power detecting unit detecting a region, exceeding a threshold value, of the synthesized signal as peak power and generating a peak power signal corresponding to the peak power;
• a reduction signal generating unit converting the peak power signal into a signal in a frequency domain, segmenting the signal into signals deriving from the input signals, and organizing the signals deriving from the input signals into reduction signals;
• and
• a reducing unit reducing the peak power by adding the reduction signal with a reduction quantity differentiated on a per-modulation-method basis to the input signal.

A peak power reduction method by which a peak power reduction circuit, in a configuration of synthesizing input signals taking different modulation methods in a time domain, executing:

• detecting a region, exceeding a threshold value, of the synthesized signal as peak power and generating a peak power signal corresponding to the peak power;
• converting the peak power signal into a signal in a frequency domain, segmenting the signal into signals deriving from the input signals, and organizing the signals deriving from the input signals into reduction signals;
• and
• reducing the peak power by adding the reduction signal with a reduction quantity differentiated on a per-modulation-method basis to the input signal.