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Books > Computing & IT > Computer communications & networking
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Adaptive RF Front-Ends for Hand-held Applications (Paperback, 2011 ed.)
Loot Price: R2,910
Discovery Miles 29 100
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Adaptive RF Front-Ends for Hand-held Applications (Paperback, 2011 ed.)
Series: Analog Circuits and Signal Processing
Expected to ship within 10 - 15 working days
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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.
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