Title :
Comparison between digital and analog predistortion for satellite communications
Author :
Alasady, H. ; Boutros, R. ; Ibnkahla, M.
Author_Institution :
Dept. of Eletrical & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
Satellite communication channels are equipped with high power amplifier (HPA). The drawback of this amplifier is that it is highly nonlinear, which makes the use of highly bandwidth-efficient modulation techniques unpractical. There are several techniques that are used in the literature that reduces the effect of the nonlinearity without the need to backoff; these include digital and analog predistortion. This paper presents a comparison between these two techniques, as well as the advantages and disadvantages of each scheme.
Keywords :
neural nets; nonlinear distortion; power amplifiers; satellite communication; telecommunication channels; analog predistortion; bandwidth-efficient modulation techniques; digital predistortion; high power amplifier; neural networks; satellite communication channels; Artificial satellites; Constellation diagram; High power amplifiers; Neural networks; Nonlinear distortion; Power amplifiers; Predistortion; Probability; Satellite communication; Transmitters;
Conference_Titel :
Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on
Print_ISBN :
0-7803-7781-8
DOI :
10.1109/CCECE.2003.1226373
