Title :
An adaptive RF individual-order predistorter using power minimization [CDMA cellular applications]
Author :
Kim, Jin Young ; Kim, Jong Heon
Author_Institution :
Dept. of Radio Sci. & Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
In this paper, an adaptive RF individual-order predistorter, using power minimization, is proposed and manufactured for CDMA cellular systems. From the measurement results, the proposed adaptive predistorter gives an improvement for the 2-tone test which is 23.6 dBc and 11.97 dBc for IM3 and IM5, respectively. Also, from the field test of CDMA IFA IS-95A, 4 dB improvement is achieved. Through experiments, the stability of the adaptive predistorter is maintained below -46.5 dBc over -10°C∼55°C.
Keywords :
UHF power amplifiers; adaptive filters; cellular radio; circuit stability; code division multiple access; intermodulation distortion; linearisation techniques; -10 to 55 degC; 10 W; CDMA cellular systems; IMD; adaptive RF individual-order predistorter; adaptive filter; amplifier nonlinearities; power amplifier linearization; power minimization; predistorter stability; Multiaccess communication; Nonlinear distortion; Power engineering and energy; Pulp manufacturing; Radio frequency; Radiofrequency amplifiers; Signal generators; Stability; Temperature; Testing;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8639-6
DOI :
10.1109/ISPACS.2004.1439144
