Patent ID: 7467338
Filing Date: 2008-12-16
Classification: H04L

Abstract:
1. Apparatus for generating an error signal from an input signal, the input signal comprising a signal peak, the error signal to be combined with the input signal for generating a transmit signal having a reduced signal peak, the apparatus comprising: means for a limiting the input signal to obtain a limited signal; means for calculating a preliminary error signal representing a difference between the input signal and the limited signal or representing the input signal, wherein the preliminary error signal comprises a number of preliminary error signal values; means for manipulating the preliminary error signal to obtain the error signal, wherein the means for manipulating is configured for varying a preliminary error signal value to obtain an error signal value which is non-equal to zero, and such that the error signal value is in a predetermined value range associated with a predetermined area in a signal space domain, wherein the means for manipulating is further configured, for the case the preliminary error signal value does not meet a property requirement, for back manipulating the preliminary error signal value to obtain an error signal value such that the error signal value is associated with a signal space constellation point being within a further predetermined area in the single space domain but outside the predetermined area, the further predetermined area being wider than the predetermined area.