Nonideality sources and implementation considerations in polar transmitters
Artikel i vetenskaplig tidskrift, 2009

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.

Wireless systems

Linearity

Nonlinear distortion

Efficiency

Polar transmitters

Power amplifiers

Författare

Jose A. Garcia

Universidad de Cantabria

Jose C. Pedro

Universidade de Aveiro

Pedro Miguel Cabral

Universidade de Aveiro

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Hossein Mashad Nemati

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Anding Zhu

University College Dublin

P. Colantonio

Universita degli Studi di Roma Tor Vergata

International Journal of Microwave and Wireless Technologies

1759-0787 (ISSN)

Vol. 1 109-116

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1017/S1759078709000105