An RF Carrier Bursting System using Partial Quantization Noise Cancellation
Artikel i vetenskaplig tidskrift, 2012
This paper introduces a novel method for bandpass cancellation of the quantization noise occurring in high efficiency, envelope pulsed transmitter architectures - or carrier bursting. An equivalent complex baseband model of the proposed system, including the Sigma Delta-modulator and cancellation signal generation, is developed. Analysis of the baseband model is performed, leading to analytical expressions of the power amplifier drain efficiency, assuming the use of an ideal class B power amplifier. These expressions are further used to study the impact of key system parameters, i.e. the compensation signal variance and clipping probability, on the class~B power amplifier drain efficiency and signal-to-noise ratio.
The paper concludes with simulations followed by practical measurements in order to validate the functionality of the method and to evaluate the performance-trend predictions made by the theoretical framework in terms of efficiency and spectral purity.
Författare
Ulf Gustavsson
Gigahertzcentrum
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Thomas Eriksson
Gigahertzcentrum
Chalmers, Signaler och system, Kommunikation, Antenner och Optiska Nätverk
Hossein Mashad Nemati
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Gigahertzcentrum
Paul Saad
Gigahertzcentrum
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
Peter Singerl
Infineon Technologies
Christian Fager
Gigahertzcentrum
Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik
IEEE Transactions on Circuits and Systems I: Regular Papers
1549-8328 (ISSN) 15580806 (eISSN)
Vol. 59 3 515-528 2167271Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier
Kommunikationssystem
Signalbehandling
DOI
10.1109/TCSI.2011.2167271