Title :
Power amplifier module with digital adaptive predistortion for cellular phone
Author :
Kusunoki, S. ; Yamamoto, K. ; Hatsugai, T. ; Tagami, K. ; Nagaoka, H. ; Tominaga, N. ; Osawa, K. ; Tanabe, K. ; Sakurai, S. ; Iida, T.
Author_Institution :
Sony Ericsson Mobile Commun. Japan Inc., Japan
Abstract :
This paper describes a new type of PA-module which contains a predistortion function and the application to N-CDMA handset terminals. The predistortion technology is based on look-up-table method using the input and output signal envelopes and can operate independent from the base-band block. By omitting the adaptative predistortion for AM/PM, and integrating main controlling functions on CMOS IC chip, the predistortion technique has been realized in a PA-module. The PA-module has been achieved the power added efficiency (PAE) of 48% at the output power of 27.5 dBm. This PAE is extremely high in comparison with the conventional PA-module for N-CDMA.
Keywords :
CMOS analogue integrated circuits; cellular radio; code division multiple access; power amplifiers; table lookup; telephone sets; 48 percent; CMOS IC chip; N-CDMA handset terminal; cellular phone; digital adaptive predistortion; look-up table; output power; power added efficiency; power amplifier module; CMOS integrated circuits; Cellular phones; MMICs; Peak to average power ratio; Power amplifiers; Power generation; Predistortion; Table lookup; Telephone sets; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011742
