Optimization of the Crest Factor for Complex-Valued Multisine Signals

Multisine signals are commonly used in the measurement of dynamic systems and wireless channels. For optimal measurements with a high dynamic range, a low Crest Factor (CF) excitation signal is required. In this pa-per, a modified approach to optimize the crest factor for complex-valued multisine signals is presented. The approach uses a nonlinear optimization method where the real and imaginary parts can also be optimized for low CF. Further-more, extensions of the real-valued multisine CF optimiza-tion methods are presented for complex-valued cases. The proposed methods are validated and compared using simu-lations. Based on the results it is shown that the novel ap-proach can lead to more optimal signal design and lower CF compared to other techniques for complex-valued multisine signals.