Title :
The effect of quadrature modulator and demodulator errors on adaptive digital predistorters
Author :
Cavers, James K.
Author_Institution :
Dept. of Eng. Sci., Simon Fraser Univ., Burnaby, BC, Canada
Abstract :
Imperfections in quadrature modulators and demodulators-gain and phase imbalance and DC offset-have a crippling effect on amplifier linearization circuits. This paper determines the required accuracy of the quadrature modulator and demodulator as a tradeoff between intermodulation power and speed of adaptation
Keywords :
demodulators; digital circuits; error analysis; intermodulation; linearisation techniques; modulators; power amplifiers; radiofrequency amplifiers; transceivers; DC offset; adaptation speed; adaptive digital predistorters; amplifier linearization circuits; demodulator errors; gain; intermodulation; phase imbalance; quadrature modulator; Baseband; Circuits; Delay; Demodulation; Digital modulation; Phase modulation; Power amplifiers; Signal processing; Table lookup; Transceivers;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.501503
