Patent ID: 8548090
Filing Date: 2013-10-01
Classification: H04L

Abstract:
1. A transmitting apparatus in a mobile communications system, comprising: a data modulating circuit which maps a predetermined number of data sets to one or more reference signal points of a symbol constellation; an inverse Fourier transforming circuit which inverse Fourier transforms a data-modulated signal, generating a time-domain signal; a peak suppressing circuit which suppresses the time-domain signal such that a peak power decreases when the time-domain signal meets a predetermined condition; a Fourier transforming circuit which Fourier transforms the peak-suppressed signal and generates a frequency-domain signal; a modifying circuit which modifies the frequency-domain signal, and provides the modified signal to the inverse Fourier transforming circuit, wherein, the modifying circuit, is arranged to move, when a peak-suppressed signal point in the symbol constellation does not belong to a predetermined surrounding area which surrounds the respective reference signal points, the peak-suppressed signal point to a point within the surrounding area, wherein for a data sub-carrier, the peak-suppressed signal point is arranged to be moved to the point within the surrounding area when the peak-suppressed signal point in the symbol constellation does not belong to the predetermined surrounding area which surrounds each of the reference signal points, and for a null sub-carrier, the peak-suppressed signal point is arranged to be moved such that a peak-suppressed signal power takes a value which is no more than a predetermined value.