Adaptive predistortion circuit

作者： Georges Societe Civile S.P.I.D. Karam , Hikmet Societe Civile S.P.I.D. Sari

DOI:

关键词: Electronic engineering 、 Demodulation 、 Amplifier 、 Digital data 、 Engineering 、 Clock signal 、 Shift register 、 Data transmission 、 Filter (video) 、 Predistortion

摘要: Adaptive predistortion circuit for a digital transmission system which comprises:… . (521, 522, 523) predistorts the input data before they pass into modulator (56) and then an amplifier (57),… adapting (611, 622, 613) which, from demodulation of flow transmitted data, continuously adapts to data. … It comprises encoding (51) ak, generates, on first channel, bk leave predistorted (52) in phase with clock pulse, second ck (522) phase-shifted by T/3 pulse and, third dk (523) 2 pulse. The signals bk, are obtained polynomial encoding. may be carried out aid shift registers (621 ... 62i) addressing memory (63) or means transversal filter (711, 712, 713). also analog output (81) followed samplers (821, 822, 823). Application: systems.