Improvement of digital mapping predistorters for linearising transmitters

Author

Qiming Ren ; Wolff, I.

Author_Institution

Dept. of Electr. Eng., Duisburg Univ., Germany

Volume

3

fYear

1997

fDate

8-13 June 1997

Firstpage

1691

Abstract

In this paper we present a new kind of 2-dimensional mapping predistorter for linearising transmitters. This method applies self-tuning adaptive control to eliminate iteration processes and therefore to reduce adaptation time. All errors due to modulator imperfections (e.g. RF carrier leakage from local oscillator, differential gain and phase imbalance between I and Q paths) can be corrected by this method. The simulation shows that adaptation time and memory size of look-up-tables are reduced.

Keywords

adaptive control; electric distortion; linearisation techniques; radio transmitters; self-adjusting systems; I path; Q path; RF carrier leakage; adaptation time; differential gain; error correction; linearising transmitter; local oscillator; look-up-table; memory size; modulator; phase imbalance; self-tuning adaptive control; simulation; two-dimensional digital mapping predistorter; Adaptive control; Adaptive filters; Error correction; High power amplifiers; Linearity; Mobile communication; Power amplifiers; Predistortion; Signal processing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1997., IEEE MTT-S International

Conference_Location

Denver, CO, USA

ISSN

0149-645X

Print_ISBN

0-7803-3814-6

Type

conf

DOI

10.1109/MWSYM.1997.596751

Filename

596751