NDLI: Practical high-efficiency partial-Envelope Tracking power amplifier system with broadband applications

Content Provider	IEEE Xplore Digital Library
Author	Sorsby, W.B. Kean, T.L. Heibel, S.L. Hegazi, G.M.
Copyright Year	2010
Description	Author affiliation: Rockwell Collins, Incorporated, Cedar Rapids, Iowa, 52498, USA (Sorsby, W.B.; Kean, T.L.; Heibel, S.L.; Hegazi, G.M.)
Abstract	Spectrally-efficient high peak-to-average power ratio (PAPR) waveforms exhibit disadvantages compared to constant-envelope waveforms for frequency-agile systems when power-efficiency is paramount. EER and Envelope Tracking offer high efficiency but require precise adjustment and wide bandwidth power supplies/modulators. Frequency agility introduces implementation complexities when systems must tune wide frequency ranges or cover multiple channels. Combining advantages of Envelope Tracking and EER, a partial-envelope tracking power amplifier system demonstrates robust operation across multiple channels, requires no frequency dependent adjustments, and exhibits excellent spectral purity combined with high power-efficiency. Experimental UHF data shows 135 watts of output power with 55% efficiency using LDMOS devices, for uplink WCDMA (approximately 4dB PAPR).
Starting Page	104
Ending Page	107
File Size	308419
Page Count	4
File Format	PDF
ISBN	9781424447251
DOI	10.1109/RWS.2010.5434183
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-01-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadband amplifiers High power amplifiers Peak to average power ratio Bandwidth Power supplies Operational amplifiers Robustness Frequency dependence Power generation Power amplifiers power amplifiers Envelope Tracking Envelope Elimination and Restoration EER Polar Modulation WCDMA OFDM pre-distortion high-efficiency
Content Type	Text
Resource Type	Article

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