EER architecture specifications for OFDM transmitter using a class E amplifier

Diet, Antoine; Berland, Corinne; Villegas, Martine; Baudoin, Geneviève

doi:10.1109/lmwc.2004.832618

Cited by 54 publications

(42 citation statements)

References 4 publications

(5 reference statements)

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“…The envelope is amplified with high efficiency envelope amplifier, whereas the carrier is amplified with nonlinear but highly efficient power amplifier. The output of the envelope amplifier is supplied to the carrier amplifier which reconstructs the typical signal with nonconstant envelope of modern wireless communication standards (Diet et al, 2004).…”

Section: Envelope Elimination and Restoration (Eer) Or Kahn Techniquementioning

confidence: 99%

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Gallium Nitride-Based Power Amplifiers for Future Wireless Communication Infrastructure

Chalermwisutkul¹

2012

Wireless Communications and Networks - Recent Advances

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IntroductionProgress in wireless communication technology has enabled applications which were unthinkable as the first digital mobile phone came into the market. Integration of digital camera into a mobile phone was an important step of the convergence between telecommunication and information technology as users started to require transfer of digital pictures besides conventional voice and text information. In addition, fast progress in digital technology has been an immense driving force of the needs for high data rates in telecommunications. Digital multimedia contents e.g. pictures, music, video clips are expected to be available anytime and anywhere which results into tremendous requirements in research and development in wireless technology.Even though the industry tends to be majorly driven by software applications as well as "look and feel" of mobile devices, enabling hardware technologies in the background also deserve appropriate attention from R&D engineers. As soon as the performance of mobile communication systems cannot fulfil the expectation of users in terms of data rate and error robustness, the importance of the enabling hardware technology becomes obvious.In order to cope with the rapid growth of the needs in wireless data transmission with constantly increasing data rates, new technical challenges arise perpetually on every layers of the OSI reference model. Whereas new modulation and multiple access techniques e.g. OFDM and OFDMA are introduced to support higher data rates and intelligent network configuration deals with the optimization of routing to increase the capacity and to improve load distribution, progress in hardware components in mobile devices and mobile base stations on the physical layer is also required to serve the needs of the higher OSI layers. Such progress on the physical layer includes techniques and hardware architectures which can enhance power efficiency of the system components while still complying with other specifications regarding linearity, noise, interference, etc.. Also, novel semiconductor device technology provides improved power handling capability resulting in smaller hardware size and high impedance which simplifies the design of matching networks. Moreover, large bandwidth and high impedance offer the possibility to create multiband components by designing the matching networks to be reconfigurable (Fischer, 2004).This chapter aims to review state-of-the-art research in power amplifiers for wireless communication infrastructure featuring advantages of Gallium Nitride (GaN)-based power www.intechopen.com Wireless Communications and Networks -Recent Advances 158devices including large bandwidth capability, high power density and high output impedance. Regarding the issues of power amplifier design, state-of-the-art power amplifier architectures will be discussed with various prospects. For wireless communication standards with high data rates e.g. WCDMA, WiMAX and LTE, their modulation schemes and multiple access techniques lead to non-constant signal enve...

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Section: Envelope Elimination and Restoration (Eer) Or Kahn Techniquementioning

confidence: 99%

“…Combination of a class E amplifier with average efficiency enhancement techniques e.g. EER or Doherty has been reported in the literature (Diet et al, 2004 andKim et al 2010).…”

Section: Class Ementioning

confidence: 99%

Gallium Nitride-Based Power Amplifiers for Future Wireless Communication Infrastructure

Chalermwisutkul¹

2012

Wireless Communications and Networks - Recent Advances

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“…Second part will present directly switched mode class E HPA [1-2-3] where the flexibility is discussed. Power control and amplitude information can be restored with supply modulation [4][5] or using Sigma-Delta modulation [6]. The third part will summarized the frequency tuning possibilities in terms of efficiency, output power and linearity of such HPAs using a simple model of MESFET.…”

Section: -Cognitive Multi-radio Standardsmentioning

confidence: 99%

Flexibility of class E HPA for cognitive multi-radio architecture

Diet

Robert

Penaloza

et al. 2008

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications

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“…One of the key remaining challenges for a successful realization of such system is the practical implementation of efficient, wide-bandwidth baseband envelope-tracking power converter [3]. Hitherto, the study of a Class-E PA as a RF amplifier [4], considering separately limited envelope's path bandwidth and time mismatch between paths [5,6,7] and adding AM/AM curve to model restoration [8] with a WLANlike signal have been performed. With a two-tone test, an EER architecture with a switching power converter as envelope amplifier has also been evaluated [9].…”

Section: Introductionmentioning

confidence: 99%

Circuit/system design space characterization of EER-based transmitter for 802.11a WLAN standard

Marchan¹,

Barba²,

Marco³

et al. 2010

Proceedings of 2010 IEEE International Symposium on Circuits and Systems

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Abstract-Due to the increase of required bandwidth, the newer generation of communication systems uses spectrum-efficient digital modulations that involve non-constant envelope RF signals. A technique that potentially can concurrently provide high efficiency and linearity is the Envelope Elimination and Restoration (EER) transmitter architecture which is based on the decomposition of the transmitted signal in a broadband baseband envelope (processed by an envelope-tracking switching power converter) and a narrowband phase-modulated signal (processed by a class-E switch-mode RFPA) and the subsequent restoration (through wideband adaptive RF PA supply). In this work, a behavioral system-level characterization of how circuitlevel effects (namely limited bandwidth and switching effects) affect the overall communication system performance metrics (characterized by spectra, eye diagrams, signal constellations, EVM and BER) of a 802.11a WLAN system is presented.

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EER architecture specifications for OFDM transmitter using a class E amplifier

Cited by 54 publications

References 4 publications

Gallium Nitride-Based Power Amplifiers for Future Wireless Communication Infrastructure

Gallium Nitride-Based Power Amplifiers for Future Wireless Communication Infrastructure

Flexibility of class E HPA for cognitive multi-radio architecture

Circuit/system design space characterization of EER-based transmitter for 802.11a WLAN standard

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