×

METHOD AND APPARATUS FOR CREST FACTOR REDUCTION

  • US 20110228872A1
  • Filed: 02/22/2011
  • Published: 09/22/2011
  • Est. Priority Date: 02/22/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method for reducing the crest factor of an input signal, the method performed in a part of a transmitter and comprising:

  • creating a clipped signal by clipping the input signal using a predetermined clipping threshold;

    creating a peak signal from the input signal, the peak signal comprising a difference between the input signal and the clipped signal;

    convoluting at least a part of the peak signal with the inverse Fourier transform of a filtering mask defined in the frequency domain to create a filtered signal; and

    creating a subtraction signal by subtracting the filtered signal from the input signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×