Title :
On the Spectral Regrowth in Polar Transmitters
Author :
Strasser, Georg ; Lindner, Benjamin ; Maurer, Linus ; Hueber, Gernot ; Springer, Andreas
Author_Institution :
LCM GmbH, Linz
Abstract :
The envelope elimination and restoration (EER) or so called polar transmission concept proposes significant power efficiency increase for the power amplifier (PA). Up to now no products or prototypes have been published, which are able to handle complex and wideband modulation standards like WCDMA, and concurrently fulfill the spectrum emission mask completely. This paper shows the background, why polar modulation causes spectral regrowth, and why it is not possible to overcome this by simple filtering
Keywords :
modulation; power amplifiers; radio transmitters; signal processing; wideband amplifiers; EER; PA; UMTS; WCDMA; envelope elimination and restoration; polar modulation; polar transmitters; power amplifier; power efficiency increase; spectral regrowth; Broadband amplifiers; Design engineering; GSM; Multiaccess communication; Phase modulation; Power amplifiers; Power engineering and energy; Power generation; Transmitters; Wideband; EER; Polar-Transmitter; UMTS; WCDMA;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249770
