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Nonideality sources and implementation considerations in polar transmitters

Jose A. Garcia ; Jose C. Pedro ; Pedro Miguel Cabral ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Hossein Mashad Nemati (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Anding Zhu ; Paolo Colantino
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES (1759-0787). Vol. 1 (2009), 2, p. 109-116.
[Artikel, refereegranskad vetenskaplig]

In this paper, the main nonidealities appearing in polar transmitters will be addressed, together with several implementation considerations. Special attention will be paid to the role of AM modulation nonlinearity and parasitic AM-to-PM conversion, once architecture mechanisms such 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 2013-11-04. Senast ändrad 2015-12-17.
CPL Pubid: 186014

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur