Patent ID: 7778347
Filing Date: 2010-08-17
Classification: H04L

Abstract:
1. A method for power de-rating reduction in a transmitter of a wireless communication device, comprising: mapping N first samples of a first discrete Fourier transform (DFT) of a group of coded symbols to M sub-carriers according to a first predetermined sub-carrier mapping rule, where M is greater than N; performing a first inverse DFT (IDFT) on the M sub-carriers to provide M second samples; clipping the M second samples according to a clipping rule to provide M third samples; performing a second DFT on the M third samples; de-mapping, following the second DFT, the M third samples to N fourth samples; and mapping the N fourth samples to O sub-carriers according to a predetermined second sub-carrier mapping rule, where O is greater than or equal to M, wherein a peak of a respective one of the M second samples is clipped when the peak of the respective one of the M second samples is above a high threshold, and wherein a null of a respective one of the M second samples is clipped when a null of the respective one of the M second samples is below a low threshold.