Crest factor reduction (CFR) using asymmetrical pulses

摘要

Crest factor reduction (CFR) techniques are provided using asymmetrical pulses. A crest factor reduction method comprises obtaining one or more data samples; detecting at least one peak in the one or more data samples; performing peak cancellation on the at least one detected peak by applying an asymmetric cancellation pulse to the at least one detected peak; and providing processed versions of the one or more data samples. The asymmetric cancellation pulse is generated, for example, by a minimum phase filter and has a substantially minimum group delay. New peaks associated with peak re-growth are introduced substantially only to the one side of the asymmetric cancellation pulse. The process can optionally rewind by an amount greater than or substantially equal to a group delay of the asymmetric cancellation pulse to address the limited number of pre-cursors that may be present in the asymmetric cancellation pulse.

主权项

1. A crest factor reduction method, comprising the steps of:
obtaining one or more data samples; detecting at least one peak in said one or more data samples; performing peak cancellation on said at least one detected peak by applying an asymmetric cancellation pulse to said at least one detected peak, wherein said asymmetric cancellation pulse is generated by a minimum phase filter and has a substantially minimum group delay; and providing processed versions of said one or more data samples, wherein at least one of said detecting and performing steps are performed by at least one hardware device.