Adaptive RF Front-Ends for Hand-held Applications, 2011 Analog Circuits and Signal Processing Series
The RF front-end ? antenna combination is a vital part of a mobile phone because its performance is very relevant to the link quality between hand-set and cellular network base-stations. The RF front-end performance suffers from changes in operating environment, like hand-effects, that are often unpredictable.
Adaptive RF Front-Ends for Hand-Held Applications presents an analysis on the impact of fluctuating environmental parameters. In order to overcome undesired behavior two different adaptive control methods are treated that make RF frond-ends more resilient: adaptive impedance control, and adaptive power control.
Several adaptive impedance control techniques are discussed, using a priori knowledge on matching network properties, in order to simplify robust 2-dimensional control. A generic protection concept is presented, based on adaptive power control, which improves the ruggedness of a power amplifier or preserves its linearity under extremes. It comprises over-voltage, over-temperature, and under-voltage protection.
Date de parution : 12-2014
Ouvrage de 153 p.
15.5x23.5 cm
Date de parution : 11-2010
Ouvrage de 153 p.
15.5x23.5 cm
Disponible chez l'éditeur (délai d'approvisionnement : 15 jours).
Prix indicatif 105,49 €
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Mots-clés :
Adaptive RF front-ends; Adaptive RF front-ends; Adaptive RF front-ends; Antenna hand-effects; Antenna hand-effects; Antenna hand-effects; Impedance control; Impedance control; Impedance control; Mobile communication; Mobile communication; Mobile communication; Power amplifier ruggedness; Power amplifier ruggedness; Power amplifier ruggedness