Title :
Application of Digital Adaptive Pre-distortion to Mobile Wireless Devices
Author :
Norris, George ; Staudinger, Joe ; Chen, Jau-Horng ; Rey, Claudio ; Pratt, Patrick ; Sherman, Rick ; Fraz, Hamza
Author_Institution :
Freescale Semicond., Tempe
Abstract :
Low power adaptive pre-distortion (APD) techniques are applied to nonlinear RF power amplifiers for mobile devices. An APD system is demonstrated which reduces spectral regrowth products by 10-20 dB and increases modulation accuracy by 2-6X. The use of APD allows a reduction in 3 G PA supply current by 2X and provides immunity to load mismatches as high as 8:1.
Keywords :
distortion; mobile radio; modulation; power amplifiers; radiofrequency amplifiers; digital adaptive pre-distortion; mobile wireless devices; nonlinear RF power amplifiers; spectral regrowth; Bandwidth; Costs; Delay; Feedback; Radio frequency; Radiofrequency amplifiers; Table lookup; Telephone sets; Transmitters; Transmitting antennas; Adaptive signal processing; Nonlinearities; Power amplifiers;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0530-0
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2007.380875
