APPARATUSES AND A METHOD FOR REDUCING PEAK POWER IN A TRANSMITTER OF TELECOMMUNICATIONS SYSTEMS

摘要

The present invention relates to an apparatus (100) for reducing peak pow er in a transmitter for use in telecommunications systems. The invention als o relates to a method for reducing peak power in a transmitter for use in te lecommunications system and to a base station (500) including such an appara tus. An apparatus according to the invention includes successive processing stages (10); where each stage (10) has an input main signal (1). Each stage of said apparatus further includes a peak finder means (11) arranged to find at least one peak of said input main signal (1) based on a predetermined th reshold level; a manipulation means (12) arranged to generate a scaled, rota ted and shifted kernel signal (2) based on information on at least one peak of said input main signal (1); a combiner (13) arranged to subtract the scal ed rotated and shifted kernel signal (2) from a delayed version of the input signal (1) generating thereof an output signal (4) having reduced peak or p eaks; and said apparatus further characterized in that it comprises a fracti onal sample shifting means (20) arranged to apply a sample shifting on the o utput signal (4) from at least one of said successive processing stages (10) .