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Nonlinear Modeling Analysis And Predistortion Algorithm Research Of Radio Frequency Power Amplifiers
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Book Synopsis Nonlinear Modeling Analysis and Predistortion Algorithm Research of Radio Frequency Power Amplifiers by : Jingchang Nan
Download or read book Nonlinear Modeling Analysis and Predistortion Algorithm Research of Radio Frequency Power Amplifiers written by Jingchang Nan and published by CRC Press. This book was released on 2021-07-30 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a summary of a series of achievements made by the authors and colleagues in the areas of radio frequency power amplifier modeling (including neural Volterra series modeling, neural network modeling, X-parameter modeling), nonlinear analysis methods, and power amplifier predistortion technology over the past 10 years. The book is organized into ten chapters, which respectively describe an overview of research of power amplifier behavioral models and predistortion technology, nonlinear characteristics of power amplifiers, power amplifier behavioral models and the basis of nonlinear analysis, an overview of power amplifier predistortion, Volterra series modeling of power amplifiers, power amplifier modeling based on neural networks, power amplifier modeling with X-parameters, the modeling of other power amplifiers, nonlinear circuit analysis methods, and predistortion algorithms and applications. Blending theory with analysis, this book will provide researchers and RF/microwave engineering students with a valuable resource.
Book Synopsis Nonlinear System Identification and Analysis with Applications to Power Amplifier Modeling and Power Amplifier Predistortion by : Raviv Raich
Download or read book Nonlinear System Identification and Analysis with Applications to Power Amplifier Modeling and Power Amplifier Predistortion written by Raviv Raich and published by . This book was released on 2004 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power amplifiers (PAs) are important components of communication systems and are inherently nonlinear. When a non-constant modulus signal goes through a nonlinear PA, spectral regrowth (broadening) appears in the PA output, which in turn causes adjacent channel interference (ACI). Stringent limits on the ACI are imposed by regulatory bodies, and thus the extent of the PA nonlinearity must be controlled. PA linearization is often necessary to suppress spectral regrowth, contain adjacent channel interference, and reduce bit error rate (BER). This dissertation addresses the following aspects of power amplifier research: modeling, linearization, and spectral regrowth analysis. We explore the passband and baseband PA input/output relationships and show that they manifest differently when the PA exhibits long-term, short-term, or no memory effects. The so-called quasi-memoryless case is especially clarified. Four particular nonlinear models with memory are further investigated. We provide experimental results to support our analysis. The benefits of using the orthogonal polynomials as opposed to the conventional polynomials are explored, in the context of digital baseband PA modeling and predistorter design. A closed-form expression for the orthogonal polynomial basis is derived. We demonstrate the improvement in numerical stability associated with the use of orthogonal polynomials for predistortion. Spectral analysis can help to evaluate the suitability of a given PA for amplifying certain signals or to assist in predistortion linearization algorithm design. With the orthogonal polynomials that we derived, spectral analysis of the nonlinear PA becomes a straightforward task. We carry out nonlinear spectral analysis with digitally modulated signal as input. We demonstrate an analytical approach for evaluating the power spectra of filtered QPSK and OQPSK signals after nonlinear amplification. Many communications devices are nonlinear and have a peak power or peak amplitude constraint. In addition to possibly amplifying the useful signal, the nonlinearity also generates distortions. We focus on signal-to-noise-and-distortion ratio (SNDR) optimization within the family of amplitude limited memoryless nonlinearities. We obtain a link between the capacity of amplitude-limited nonlinear channels with Gaussian noise to the SNDR.
Book Synopsis Behavioral Modeling and Linearization of RF Power Amplifiers by : John Wood
Download or read book Behavioral Modeling and Linearization of RF Power Amplifiers written by John Wood and published by Artech House. This book was released on 2014-06-01 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless voice and data communications have made great improvements, with connectivity now virtually ubiquitous. Users are demanding essentially perfect transmission and reception of voice and data. The infrastructure that supports this wide connectivity and nearly error-free delivery of information is complex, costly, and continually being improved. This resource describes the mathematical methods and practical implementations of linearization techniques for RF power amplifiers for mobile communications. This includes a review of RF power amplifier design for high efficiency operation. Readers are also provided with mathematical approaches to modeling nonlinear dynamical systems, which can be applied in the context of modeling the PA for identification in a pre-distortion system. This book also describes typical approaches to linearization and digital pre-distortion that are used in practice.
Book Synopsis RF Circuits for 5G Applications by : Sangeeta Singh
Download or read book RF Circuits for 5G Applications written by Sangeeta Singh and published by John Wiley & Sons. This book was released on 2023-03-10 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: RF CIRCUITS FOR 5G APPLICATIONS This book addresses FinFET-based analog IC designing for fifth generation (5G) communication networks and highlights the latest advances, problems, and challenges while presenting the latest research results in the field of mmwave integrated circuits designing. The wireless communication sector is experiencing exponential expansion, particularly in the areas of mobile data and the 5G mobile network, creating fresh market possibilities for designing the integrated circuits (ICs) needed in the industry. Drawing from scientific literature and practical realization, this book explores FinFET-based analog IC designing for 5G communication networks and considers the latest breakthroughs and obstacles. It also presents the recent research trends and future roadmaps for the 5G communication circuits. RF Circuits for 5G Applications includes design guidelines to be considered when designing these circuits and detrimental scaling effects of the same. In addition, to enhance the usability of this book, the editors have included real-time problems in RFIC designing and case studies from experimental results, as well as clearly demarcated design guidelines for the 5G communication ICs designing. Audience The primary target audience includes researchers, postgraduate students, and industry professionals pursuing specializations in RF engineering, electronics engineering, electrical engineering, information, and communication technology.
Book Synopsis Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters by : Karun Rawat
Download or read book Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters written by Karun Rawat and published by Springer Nature. This book was released on 2020-03-05 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on broadband power amplifier design for wireless communication. Nonlinear model embedding is described as a powerful tool for designing broadband continuous Class-J and continuous class F power amplifiers. The authors also discuss various techniques for extending bandwidth of load modulation based power amplifiers, such as Doherty power amplifier and Chireix outphasing amplifiers. The book also covers recent trends on digital as well as analog techniques to enhance bandwidth and linearity in wireless transmitters. Presents latest trends in designing broadband power amplifiers; Covers latest techniques for using nonlinear model embedding in designing power amplifiers based on waveform engineering; Describes the latest techniques for extending bandwidth of load modulation based power amplifiers such as Doherty power amplifier and Chireix outphasing amplifiers; Includes coverage of hybrid analog/digital predistortion as wideband solution for wireless transmitters; Discusses recent trends on on-chip power amplifier design with GaN /GaAs MMICs for high frequency applications.
Book Synopsis Introduction to RF Power Amplifier Design and Simulation by : Abdullah Eroglu
Download or read book Introduction to RF Power Amplifier Design and Simulation written by Abdullah Eroglu and published by CRC Press. This book was released on 2018-09-03 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to RF Power Amplifier Design and Simulation fills a gap in the existing literature by providing step-by-step guidance for the design of radio frequency (RF) power amplifiers, from analytical formulation to simulation, implementation, and measurement. Featuring numerous illustrations and examples of real-world engineering applications, this book: Gives an overview of intermodulation and elaborates on the difference between linear and nonlinear amplifiers Describes the high-frequency model and transient characteristics of metal–oxide–semiconductor field-effect transistors Details active device modeling techniques for transistors and parasitic extraction methods for active devices Explores network and scattering parameters, resonators, matching networks, and tools such as the Smith chart Covers power-sensing devices including four-port directional couplers and new types of reflectometers Presents RF filter designs for power amplifiers as well as application examples of special filter types Demonstrates the use of computer-aided design (CAD) tools, implementing systematic design techniques Blending theory with practice, Introduction to RF Power Amplifier Design and Simulation supplies engineers, researchers, and RF/microwave engineering students with a valuable resource for the creation of efficient, better-performing, low-profile, high-power RF amplifiers.
Book Synopsis Modeling and Design Techniques for RF Power Amplifiers by : Arvind Raghavan
Download or read book Modeling and Design Techniques for RF Power Amplifiers written by Arvind Raghavan and published by John Wiley & Sons. This book was released on 2008-01-09 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieve higher levels of performance, integration, compactness, and cost-effectiveness in the design and modeling of radio-frequency (RF) power amplifiers RF power amplifiers are important components of any wireless transmitter, but are often the limiting factors in achieving better performance and lower cost in a wireless communication system—presenting the RF IC design community with many challenges. The next-generation technological advances presented in this book are the result of cutting-edge research in the area of large-signal device modeling and RF power amplifier design at the Georgia Institute of Technology, and have the potential to significantly address issues of performance and cost-effectiveness in this area. Richly complemented with hundreds of figures and equations, Modeling and Design Techniques for RF Power Amplifiers introduces and explores the most important topics related to RF power amplifier design under one concise cover. With a focus on efficiency enhancement techniques and the latest advances in the field, coverage includes: Device modeling for CAD Empirical modeling of bipolar devices Scalable modeling of RF MOSFETs Power amplifier IC design Power amplifier design in silicon Efficiency enhancement of RF power amplifiers The description of state-of-the-art techniques makes this book a valuable and handy reference for practicing engineers and researchers, while the breadth of coverage makes it an ideal text for graduate- and advanced undergraduate-level courses in the area of RF power amplifier design and modeling.
Book Synopsis Digital Predistortion for Nonlinear RF Power Amplifiers in Wideband Communication Systems by : Ibrahim Fatungase
Download or read book Digital Predistortion for Nonlinear RF Power Amplifiers in Wideband Communication Systems written by Ibrahim Fatungase and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis provides a comprehensive study of linearity enhancement in Radio Frequency (RF) Power Amplifiers (PA) while transmitting wideband signals with a high Peak Average Power Ratio (PAPR). With the advancement of digital modulation techniques, signals with a highly variable envelope create challenges for the linearity of a transmitter's exciter electronics. The main focus of this work is on modeling existing Power Amplifier designs and improving their linearity to accommodate these advanced modulation techniques without violating spectrum emission requirements. A key aspect of this research involves the development and implementation of a memory polynomial pre-distortion method for the mitigation of memoryless nonlinearity, which is demonstrated to be effective through computational simulations and hardware implementation. The thesis also acknowledges existing challenges in addressing memory distortion, as it identifies specific areas where current methodologies fall short, underscoring the potential for continued research and innovation in this domain. Overall, this research holds significant implications for improving power efficiency and spectral efficiency in RF communication systems, which ultimately contributes to the advancement of wireless transmission technologies.
Book Synopsis Advanced Design Techniques for RF Power Amplifiers by : Anna N. Rudiakova
Download or read book Advanced Design Techniques for RF Power Amplifiers written by Anna N. Rudiakova and published by Springer Science & Business Media. This book was released on 2006-09-09 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Design Techniques for RF Power Amplifiers provides a deep analysis of theoretical aspects, modelling, and design strategies of RF high-efficiency power amplifiers. The book can be used as a guide by scientists and engineers dealing with the subject and as a text book for graduate and postgraduate students. Although primarily intended for skilled readers, it provides an excellent quick start for beginners.
Book Synopsis Linear and Switch-Mode RF Power Amplifiers by : Abdullah Eroglu
Download or read book Linear and Switch-Mode RF Power Amplifiers written by Abdullah Eroglu and published by CRC Press. This book was released on 2017-09-06 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: RF power amplifiers are implemented in communication, semiconductor wafer processing, magnetic resonance imaging (MRI), and radar systems to produce RF signal with the desired characteristics to perform several critical tasks in the entire system. They can be designed to operate in linear or switch-mode, depending on the specific application. This book explores the design and implementation methods for both linear and switch-mode amplifiers with real world engineering problems. The text discusses phased controlled switch-mode amplifiers and distortion and modulation effects in RF amplifiers. It illustrates the interface and integration of components and sub-systems for RF amplifiers. The material is further reinforced with MATLAB design files.
Book Synopsis Radio Frequency Power Amplifiers by : Magnus Isaksson
Download or read book Radio Frequency Power Amplifiers written by Magnus Isaksson and published by . This book was released on 2007 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Linear RF Outphasing Power Amplifiers by : Xuejun Zhang
Download or read book Design of Linear RF Outphasing Power Amplifiers written by Xuejun Zhang and published by Artech House. This book was released on 2003 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book devoted exclusively to the outphasing power amplifier, covering the most recent research results on important aspects in practical design and applications. A compilation of all the proposed outphasing approaches, this is an important resource for engineers designing base station and mobile handset amplifiers, engineering managers and program managers supervising power amplifier designs, and R&D personnel in industry. The work enables you to: design microwave power amplifiers with higher efficiency and improved linearity at a lower cost; understand linearity and performance tradeoffs in microwave power amplifiers; and understand the effect of new modulation techniques on microwave power amplifiers.
Book Synopsis Low Frequency Feedforward and Predistortion Linearization of RF Power Amplifiers by : Suk Keun Myoung
Download or read book Low Frequency Feedforward and Predistortion Linearization of RF Power Amplifiers written by Suk Keun Myoung and published by . This book was released on 2006 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Linearity is an area of great concerns in the development of communication systems. As the bandwidth of modulated signals becomes wider, RF power amplifiers (PA) have become a serious bottleneck due to their nonlinear response. This thesis gives a review of existing linearization systems commonly used in cellular phone basestations and which could be potentially applied to mobiles. Special focus is placed on predistortion linearization which is becoming prevalent. An alternative implementation of postdistortion often referred as low frequency feedforward linearization is also investigated. The existing issues associated with both low frequency feedforward and predistortion linearization are analyzed in details. Memory effects in PAs are identified as the origin of the degradation of the performance of linearization systems as the bandwidth is increased. Our research is concerned among other things with the development of improved RF predistortion algorithm accounting for such memory effects. In this thesis, we present theoretical work where the Volterra representation is used to analyze the performance of both predistortion and low frequency feedforward linearization systems in the presence of memory effects. A new real time algorithm is then developed for predistortion linearization which accounts for memory effects. This real time digital algorithm is then implemented in a FPGA testbed and verified using multisines and WCDMA modulated RF signals. This thesis concludes with a discussion of possible extensions of this work combining the various novel linearization schemes proposed.
Book Synopsis Distortion in RF Power Amplifiers by : Joel Vuolevi
Download or read book Distortion in RF Power Amplifiers written by Joel Vuolevi and published by Artech House. This book was released on 2003 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is a thorough treatment of distortion in RF power amplifiers. This unique resource offers expert guidance in designing easily linearizable systems that have low memory effects. It offers you a detailed understanding of how the matching impedances of a power amplifier and other RF circuits can be tuned to minimize overall distortion. What's more, you see how to build models that can be used for distortion simulations.
Book Synopsis Behavioral Modeling and Predistortion of Wideband Wireless Transmitters by : Fadhel M. Ghannouchi
Download or read book Behavioral Modeling and Predistortion of Wideband Wireless Transmitters written by Fadhel M. Ghannouchi and published by John Wiley & Sons. This book was released on 2015-07-20 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers theoretical and practical aspects related to the behavioral modelling and predistortion of wireless transmitters and power amplifiers. It includes simulation software that enables the users to apply the theory presented in the book. In the first section, the reader is given the general background of nonlinear dynamic systems along with their behavioral modelling from all its aspects. In the second part, a comprehensive compilation of behavioral models formulations and structures is provided including memory polynomial based models, box oriented models such as Hammerstein-based and Wiener-based models, and neural networks-based models. The book will be a valuable resource for design engineers, industrial engineers, applications engineers, postgraduate students, and researchers working on power amplifiers modelling, linearization, and design.
Book Synopsis RF Power Amplifiers for Mobile Communications by : Patrick Reynaert
Download or read book RF Power Amplifiers for Mobile Communications written by Patrick Reynaert and published by Springer Science & Business Media. This book was released on 2006-11-18 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book tackles both high efficiency and high linearity power amplifier (PA) design in low-voltage CMOS. With its emphasis on theory, design and implementation, the book offers a guide for those actively involved in the design of fully integrated CMOS wireless transceivers. Offering mathematical background, as well as intuitive insight, the book is essential reading for RF design engineers and researchers and is also suitable as a text book.
Book Synopsis Behavioral Modeling of Nonlinearities and Memory Effects in Power Amplifiers by : Paul J. Draxler
Download or read book Behavioral Modeling of Nonlinearities and Memory Effects in Power Amplifiers written by Paul J. Draxler and published by . This book was released on 2013 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: High data rates and tight spectral limitations in wireless communication systems require high fidelity waveform transmission with minimal distortion. The waveforms currently being used, or envisioned for the future, coupled with the need for higher efficiency radio frequency (RF) power amplifiers (PA), are driving transmitters to include predistortion and to adopt advanced architectures. PA behavioral models are required for system simulations of these advanced architectures and digital predistortion (DPD) algorithms, to quickly evaluate the component impact on system performance. One advanced technology of particular interest in this work is envelope tracking (ET) where the supply voltage is modulated at the envelope rate, keeping the RF signal operating rail to rail, which changes the performance of the RFPA. This dissertation focuses on accurate estimation of nonlinear behavioral models for PAs: both memoryless and with memory effects. Memory effects are the byproduct of physics-based or circuit-based changes within the amplifier with responses on a baseband time scale (rather than at the carrier frequency). When these memory effects become pronounced, they create a shift in the memoryless model. In order to accurately predict system performance, especially when the system includes a DPD block, it is critical to generate behavioral models for RFPAs which capture the shifts in the memoryless model. The thesis presents a new model, termed the Blackbox augmented behavioral characteristics (ABC) model, which includes the response of the internal states of the circuit. Its extraction is demonstrated from measured data using pulsed or modulated waveforms. The generation of modulated waveforms for instrumentation systems has length restrictions and input sequences are used repetitively, so they should be circular. Techniques that synthesize circular waveforms suitable for measurement systems, directly from long modulated waveforms are presented. An "expected gain" model is developed in this work, and a methodology for extracting waveform specific, expected gain models efficiently from measurements of modulated signals (such as WCDMA) is presented. These expected gain models are then applied to DPD. A technique that leverages the circular stationary measurements, memory mitigation, is presented. The DPD algorithm identifies and compensates systematic distortions in the waveform, generating input signals that achieve optimal outputs, compensating for all deterministic memory of the system and quantifying the measurement limits of the system. A number of systematic measurement impairments are encountered in these experiments. Techniques that compensate for these impairments, including phase drift and time alignment are presented. The thesis also describes behavioral modeling include demonstrating DPD using new techniques that stem from truncating and thresholding the Volterra series. When compared with two other published truncated Volterra series forms on standard Class AB PAs, all three memory models perform equally well. When applied to modeling ETPAs, however, the new thresholded Volterra series model is more efficient, using less than a third of the coefficients to describe the ETPA nonlinear memory effects. In this work, techniques are applied experimentally to RFPAs, from handset PAs to base station PAs, built with a wide variety of materials: HBTs on GaAs, LDMOS devices on Si, and HFET devices on GaN, and GaN HFET devices on Si.
