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Author: Fadhel M. Ghannouchi Publisher: John Wiley & Sons ISBN: 1119004446 Category : Technology & Engineering Languages : en Pages : 270
Book Description
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.
Author: Fadhel M. Ghannouchi Publisher: John Wiley & Sons ISBN: 1119004446 Category : Technology & Engineering Languages : en Pages : 270
Book Description
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.
Author: Fadhel M. Ghannouchi Publisher: John Wiley & Sons ISBN: 1119004438 Category : Technology & Engineering Languages : en Pages : 272
Book Description
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.
Author: Farouk Mkadem Publisher: ISBN: Category : Languages : en Pages :
Book Description
The demands for high data rates and ubiquitous/broadband wireless access necessitate the development of radio systems that deploy wide- and multi-band signals. These signals lead to high spectral utilization with negative trade-offs, such as rapidly varying envelopes and high peak-to-average power ratios (PAPRs). To deploy these types of signals, radio frequency (RF) transmitters face several challenges in power consumption, i.e., efficiency, and sources of distortions, i.e., nonlinearity. These challenges are most apparent in power amplifier (PAs) and degrade the overall performances of RF transmitters. PA efficiency and linearity are characteristics that cannot be satisfied simultaneously. At high input power, PAs exhibits high efficiency; however, a PA in that region is inherently nonlinear. Conversely, at low input power, PAs are fairly linear at the expense of efficiency. With the deployment of wide- and multi-band signals, PAs exhibit strong static nonlinearity and memory effects at high input power. These effects lead to distortions, resulting in degradation of the error vector magnitude (EVM) and spectral regrowth. This regrowth creates adjacent channel interference and violates the emission requirements mandated by regulatory bodies. Digital predistortion (DPD) has been devised to mitigate the PA nonlinearity at high input power. Subsequently, DPD improves the achievable PA linearity versus power efficiency trade-off. DPD incorporates an extra nonlinear function before the PA in order to preprocess the input signal. As a result, the cascaded system (DPD+PA) behaves linearly. DPD+PA linearity requires the DPD function to produce nonlinearities that have equal magnitude and are out phased compared to those generated by the PA. Thus, accurate PA behavioral modeling is essential for the development of DPD and is usually explored before DPD development. In the context of wide- and multi-band signals, PA behavioral models/DPD schemes face several problems that have not been addressed appropriately in the literature. One particular problem is the exponential growth of the number of coefficients with nonlinearity order and memory depth. This growth leads to models' high complexity identification and implementation. Therefore, it restricts DPD performances in trading off linearity and efficiency. Moreover, for multi-band signals, the carrier frequencies' separation can be very large (in the order of hundreds of MHz). Consequently, the conventional single-input single-output DPD is not viable due to the unrealistic sampling rate required to cover a large range of frequencies. Finally, because a very high sampling rate is needed in the PA output observation path, the practicability of the DPD is rendered more complex and sometimes unfeasible when it is deploying wideband signals. This thesis explores new schemes suitable for modeling and linearizing PA outputs when driven with wide- and multi-band signals. First, a new pruning technique is introduced to alleviate the complexity of DPD implementation. This pruning identifies the minimum set of dominant kernels needed in the Volterra series modeling scheme based on Wiener G-Functionals. The pruned Volterra series allows significant improvements of the numerical computation and stability of the DPD scheme. Second, new generalized memory polynomial (GMP) models for multi-band DPD are proposed. These multi-input multi-output GMP models show excellent potential in linearizing different nonlinear multi-band PAs. In addition, they involve cross terms and a reduced number of coefficients, which allows robustness against time delay misalignment between the multi-band signals. Finally, a new method to reduce the conventional high output sampling rate in the PA output observation path is proposed. Detailed analysis assesses the extent to which the output-sampling rate can be reduced through careful selection of the set of kernels used to represent the Volterra series DPD. This analysis results in a 2/5 reduction when the G-Functionals pruning technique is deployed. Extensive analysis and measurement validation are discussed and carefully analyzed to prove the validity of the different proposed solutions and to guarantee their generalizability.
Author: Qilian Liang Publisher: Springer Nature ISBN: 9811394091 Category : Technology & Engineering Languages : en Pages : 2720
Book Description
This book brings together papers from the 2019 International Conference on Communications, Signal Processing, and Systems, which was held in Urumqi, China, on July 20–22, 2019. Presenting the latest developments and discussing the interactions and links between these multidisciplinary fields, the book spans topics ranging from communications to signal processing and systems. It is chiefly intended for undergraduate and graduate students in electrical engineering, computer science and mathematics, researchers and engineers from academia and industry, as well as government employees.
Author: Noureddine Boudriga Publisher: Springer ISBN: 3030028496 Category : Computers Languages : en Pages : 400
Book Description
This book constitutes the refereed proceedings of the 4th International Symposium on Ubiquitous Networking, UNet 2018, held in Hammamet, Morocco, in May 2018. The 35 full papers presented together with 5 short papers in this volume were carefully reviewed and selected from 87 submissions. The focus of UNet is on technical challenges and solutions related to such a widespread adoption of networking technologies, including broadband multimedia, machine-to-machine applications, Internet of things, security and privacy, data engineering, sensor networks and RFID technologies.
Author: David del Rio Publisher: Springer ISBN: 3319932810 Category : Technology & Engineering Languages : en Pages : 255
Book Description
This book presents design methods and considerations for digitally-assisted wideband millimeter-wave transmitters. It addresses comprehensively both RF design and digital implementation simultaneously, in order to design energy- and cost-efficient high-performance transmitters for mm-wave high-speed communications. It covers the complete design flow, from link budget assessment to the transistor-level design of different RF front-end blocks, such as mixers and power amplifiers, presenting different alternatives and discussing the existing trade-offs. The authors also analyze the effect of the imperfections of these blocks in the overall performance, while describing techniques to correct and compensate for them digitally. Well-known techniques are revisited, and some new ones are described, giving examples of their applications and proving them in real integrated circuits.
Author: Dominique Schreurs Publisher: Cambridge University Press ISBN: 0521881730 Category : Technology & Engineering Languages : en Pages : 0
Book Description
A comprehensive and up-to-date one-stop reference for engineers working in power amplifier modeling or RF designers using power amplifier models.
Author: Fa-Long Luo Publisher: Cambridge University Press ISBN: 1139499017 Category : Technology & Engineering Languages : en Pages : 788
Book Description
Covering everything from signal processing algorithms to integrated circuit design, this complete guide to digital front-end is invaluable for professional engineers and researchers in the fields of signal processing, wireless communication and circuit design. Showing how theory is translated into practical technology, it covers all the relevant standards and gives readers the ideal design methodology to manage a rapidly increasing range of applications. Step-by-step information for designing practical systems is provided, with a systematic presentation of theory, principles, algorithms, standards and implementation. Design trade-offs are also included, as are practical implementation examples from real-world systems. A broad range of topics is covered, including digital pre-distortion (DPD), digital up-conversion (DUC), digital down-conversion (DDC) and DC-offset calibration. Other important areas discussed are peak-to-average power ratio (PAPR) reduction, crest factor reduction (CFR), pulse-shaping, image rejection, digital mixing, delay/gain/imbalance compensation, error correction, noise-shaping, numerical controlled oscillator (NCO) and various diversity methods.
Author: Fadhel M. Ghannouchi
Author: Fadhel M. Ghannouchi
Author: Fadhel M. Ghannouchi
Author: Farouk Mkadem
Author: Qilian Liang
Author: Noureddine Boudriga
Author: Ali Soltani Tehrani
Author: David del Rio
Author: Dominique Schreurs
Author: 
Author: Fa-Long Luo