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Nonideality Sources and Implementation Considerations in Polar Transmitters

J.A. Garcia ; J.C. Pedro ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Hossein Mashad Nemati (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; A. Zhu ; P Colantonio
Proc. European Microwave Association (EuMA), 2008 (2008)
[Konferensbidrag, refereegranskat]

In this paper, the main nonidealities appearing in polar transmitters will be addressed, together with several implementation considerarions. Special attention will be paid to the role of AM modulation nonlinearity and parasitic AM-to-PM conversion, once architecture mechanisms as time-delay mismatch between branches or limited bandwidth in the amplitude path are controlled. The device limiting factors for a highly efficient switched mode operation and a linear amplitude modulation will be identified. Some circuit design and implementation guidelines for the RF modulating stage and the envelope amplifier will be discussed, to finish with system level analysis considerations under two-tone and real communication signal excitations.

Nyckelord: Efficiency, linearity, nonlinear distortion, polar transmitters, power amplifiers, wireless systems.



Denna post skapades 2008-11-28. Senast ändrad 2015-12-17.
CPL Pubid: 79211

 

Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur