Optimization of EDGE terminal power amplifiers using memoryless digital predistortion

Author

Ceylan, N. ; Mueller, J.E. ; Weigel, R.

Author_Institution

Secure Mobile Solutions, Infineon Technol., Munich, Germany

fYear

2004

fDate

6-8 June 2004

Firstpage

373

Lastpage

376

Abstract

This paper describes a look up table (LUT) based digital predistortion system usable for EDGE (enhanced data for GSM evolution) handset transmitters. The system is memoryless and capable of improving system efficiency and performance in terms of the leakage power at offset frequencies and error vector magnitude (EVM). Minimum system requirements on wordlength and LUT size have been investigated. It is shown that a LUT having about 500 coefficients and a system wordlength of 13 bits are sufficient for EDGE. The proposed system is simple and can be easily implemented in handsets in order to improve the overall system performance.

Keywords

UHF power amplifiers; cellular radio; linearisation techniques; memoryless systems; mobile handsets; radio transmitters; table lookup; 13 bit; EDGE handset transmitters; EDGE terminal power amplifiers; EVM; LUT based digital predistortion; LUT size; enhanced data for GSM evolution; error vector magnitude; look up table wordlength; memoryless digital predistortion; offset frequencies leakage power; power amplifier linearization methods; power amplifier optimization; GSM; Linearity; Memoryless systems; Mobile communication; Power amplifiers; Power generation; Predistortion; System performance; Table lookup; Telephone sets;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE

ISSN

1529-2517

Print_ISBN

0-7803-8333-8

Type

conf

DOI

10.1109/RFIC.2004.1320625

Filename

1320625