Product category:
Communications ICs (Wired)
News Release from: Intersil | Subject: CommLink ISL5239
Edited by the Electronicstalk Editorial
Team on 08 July 2002
Lineariser raises basestation amplifier
efficiency
A novel digital predistortion lineariser allows designers to reduce the cost of wideband cellular basestations by increasing power amplifier efficiency and eliminating costly combining components.
The CommLink ISL5239 digital predistortion lineariser from Intersil allows designers to reduce the cost of wideband single-carrier and multicarrier cellular basestations by increasing power amplifier efficiency and eliminating costly combining components The ISL5239 allows basestation designers to reduce the cost of their designs by nearly 50% while increasing flexibility and performance
This article was originally published on Electronicstalk on 8 Oct 2008 at 8.00am (UK)
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Existing cellular operators face challenges associated with adding capacity to their existing basestation network while new operators face the challenge of designing networks that will scale as capacity needs increase in their served markets.
To address these challenges, basestation designers are rapidly migrating to multicarrier basestation architectures that permit multiple cellular channels to be transmitted by a single radio.
The ISL5239 performs nonlinear processing on composite multicarrier digital signals to provide up to full fifth-order predistortion of a 20MHz wideband input signal prior to multicarrier power amplification, so that the resulting output signal to the antenna is efficiently linearised.
The device is software definable so that designers can implement adaptive correction algorithms tailored specifically to the amplifier of their choice.
In addition to correcting phase and amplitude nonlinearities, the device also provides compensation for power amplifier thermal memory effects.
An evaluation board and Windows software tool with a Matlab interface enables designers to have full programming control of the ISL5239 in order to conduct hardware-in-the-loop algorithm development.
The device seamlessly interfaces to other key Intersil software radio components so that a complete software defined digital predistortion solution can be implemented with excellent performance and unmatched flexibility.
The ISL5239 is designed to support all existing and next generation cellular standards.
Samples of the ISL5239 in 160-lead CABGA packages will be available in the second quarter of 2002.
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