Research Article
On the Maximum Efficiency of Power Amplifiers in OFDM Broadcast Systems with Envelope Following
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@INPROCEEDINGS{10.1007/978-3-642-16644-0_15, author={Robert Wolf and Frank Ellinger and Ralf Eickhoff}, title={On the Maximum Efficiency of Power Amplifiers in OFDM Broadcast Systems with Envelope Following}, proceedings={Mobile Lightweight Wireless Systems. Second International ICST Conference, MOBILIGHT 2010, Barcelona, Spain, May 10-12, 2010, Revised Selected Papers}, proceedings_a={MOBILIGHT}, year={2012}, month={10}, keywords={OFDM envelope following power amplifier efficiency broadcast DVB-T operating point adjustment}, doi={10.1007/978-3-642-16644-0_15} }- Robert Wolf
Frank Ellinger
Ralf Eickhoff
Year: 2012
On the Maximum Efficiency of Power Amplifiers in OFDM Broadcast Systems with Envelope Following
MOBILIGHT
Springer
DOI: 10.1007/978-3-642-16644-0_15
Abstract
We suggest a method for determining the efficiency of the power amplifier of an OFDM broadcast system. We present how far the efficiency of conventional power amplifiers can be increased by applying envelope following. The dependency of the efficiency on the probability of clipping is derived. In this context all three possibilities of operating point adjustment are investigated. Finally, we show that by adjusting only the operating point voltage of the power amplifier the efficiency of OFDM broadcast systems can be doubled.
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