The maximum amplitude of a waveform corresponding to a particular harmonic spectrum depends on the phases of its harmonic components. A waveform with a low peak-to-rms ratio is desirable in situations requiring a maximum signal-to-noise ratio. This paper introduces a genetic algorithm-based method for selecting the phases that produces better results than previously described methods. Results for four different amplitude spectra are given. For the case of a flat spectrum with up to 40 harmonics, the genetic algorithm finds peak factors (peak/√2 rms) ranging from 0.98 to 1.24.
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Horner et al. (1996) studied this question.
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