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Power Consumption Model for Linear RF Power Amplifiers with Rectangular M-QAM Modulation

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2 Author(s)
Talonen, Mikko ; Electronic Circuit Design Laboratory, Helsinki University of Technology, Electronic Circuit Design Laboratory P.O.Box 3000 FIN-02015 HUT Finland, ; Lindfors, Saska

Signal and transmit power dependent power consumption models for linear, class-A and class-B RF power amplifiers are derived. The power consumption of a class-B amplifier displays a square root dependency with respect to transmit power. The effect of signal statistics is studied for root- raised cosine filtered and M-QAM modulated signals. While the order of the modulation and filter roll-off have a strong effect on the maximum transmit power they are found to have only marginal impact on the power consumption below the maximum.

Published in:

Wireless Communication Systems, 2007. ISWCS 2007. 4th International Symposium on

Date of Conference:

17-19 Oct. 2007