Patent ID: 9008223
Filing Date: 2015-04-14
Classification: H04L

Abstract:
1. A method for processing a digitally modulated communication signal comprising: upsampling a first frequency domain representation of the digitally modulated communication signal by an upsampling factor to generate a second frequency domain representation; transforming the second frequency domain representation into a first time domain representation; limiting the magnitude of samples of the first time domain representation to a magnitude limit; transforming the first time domain representation with the magnitude limit into a third frequency domain representation; downsampling the third frequency domain representation by a downsampling factor to produce a fourth frequency domain representation; and filtering the fourth frequency domain representation in a frequency domain filter circuit to produce a fifth frequency domain representation, wherein the fifth frequency domain representation is filtered to include in-band subcarriers and included out-of-band subcarriers but to exclude excluded out-of-band subcarriers.