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Baseband compensation techniques for bandpass nonlinearities

Ali Behravan (Institutionen för signaler och system, Kommunikationssystem) ; Thomas Eriksson (Institutionen för signaler och system, Kommunikationssystem)
Proceedings of the IEEE Vehicular technology conference fall 2003, Orlando, Florida, USA, OCT 06-09 p. 279-283. (2003)
[Konferensbidrag, refereegranskat]

In this paper we present and compare several methods of compensating the nonlinearity of the RF front-end of a wireless system. Two baseband compensation techniques, namely predistortion and postdistortion (equalization) of the baseband signal are discussed and the problems associated with each one is addressed. Furthermore a combination of a predistorter and a nonlinear equalizer and also predistortion of oversampled baseband signal are analyzed. It will be shown that under realistic conditions with a frequently saturated amplifier and ISI channel, the latter two methods are able to compensate the nonlinearity up to a good extent, while the first two methods can only operate under certain assumptions for channel conditions and nonlinearity type.

Nyckelord: system-comp



Denna post skapades 2006-09-12. Senast ändrad 2016-02-01.
CPL Pubid: 15117

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)

Ämnesområden

Information Technology

Chalmers infrastruktur