Title :
Adaptive predistortion for amplifier linearization for UMTS terminals
Author :
Springer, A. ; Gerdenitsch, A. ; Li, Z. ; Stelzer, A. ; Weigel, R.
Author_Institution :
Inst. for Commun. & Inf. Eng., Linz Univ., Austria
Abstract :
In this paper we describe the effect of amplifier linearization by means of adaptive look-up-table-based digital predistortion for the UMTS (Universal Mobile Telecommunications System) uplink. Simulations and measurements show that digital predistortion can improve the ACPR performance up to 10 dB. Error sources like the quadrature modulator and demodulator and the antenna mismatch are analyzed and found to be manageable.
Keywords :
3G mobile communication; demodulators; digital radio; linearisation techniques; mobile antennas; modulators; radiofrequency amplifiers; ACPR performance; UMTS terminals; UMTS uplink; Universal Mobile Telecommunications System; adaptive predistortion; amplifier linearization; antenna mismatch; demodulator; digital predistortion; error sources; look-up-table; quadrature modulator; 3G mobile communication; Antenna measurements; Demodulation; Predistortion;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on
Print_ISBN :
0-7803-7627-7
DOI :
10.1109/ISSSTA.2002.1049290
