A technique for Crest Factor reduction of multi-carrier signals using phase rotation is described. The multi-carrier signal could be in digital baseband, analog baseband, or analog RF (radio frequency). The multi-carrier signal is converted to individual baseband representatives before each individual baseband signal being phase rotated according to an algorithm which maintains the crest factor to a pre-defined value. The algorithm uses a deterministic phase rotation technique and each phase rotated baseband signals will be individually filtered to remove the unwanted signals. The phase rotated and filtered baseband signals are then up converted and combined to reconstruct the multi-carrier signal. The crest factor reduction is limited by the in band distortion introduced to each individual signal.