High efficiency digital polar transmitter for cellular handsets

In this paper, the architecture of a digital polar transmitter system for cellular multi-mode handset is presented with hardware implementation emphasis on 2/2.5G systems (GSM/EDGE). The most prominent feature of this architecture is it's ability to employ a highly nonlinear PA, this highly eff...

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Bibliographic Details
Main Authors: Reddy, A., Qing Li, Ahmed, W., Kpodzo, E.
Format: Conference Proceeding
Language:English
Subjects:
Detectors
GSM
Phase modulation
Radio frequency
Synchronization
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Transmitters
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Summary:In this paper, the architecture of a digital polar transmitter system for cellular multi-mode handset is presented with hardware implementation emphasis on 2/2.5G systems (GSM/EDGE). The most prominent feature of this architecture is it's ability to employ a highly nonlinear PA, this highly efficient. This is accomplished via our novel real-time nonlinear closed-loop predictive calibration for correcting the PA's nonlinearity. In addition, our architecture makes it possible to eliminate or minimize the need for extensive factory calibration since our predictive realtime auto-calibration scheme does not require much prior knowledge of the system characteristics.
DOI:10.1109/SARNOF.2011.5876445