Low Power Analog to Digital Converter Design for Software-defined Radios PDF Download
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Author: Muhamamd Z. Ali
Publisher:
ISBN:
Category : Analog-to-digital converters
Languages : en
Pages : 83
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Book Description
Increasing data requirements have created a frequency shortage that has led to a wider spectrum being used for wireless data transmission. In a transceiver, analog-to-digital converters are rate-limiting steps that require a radio frequency filter in the front end design to operate effectively. Data converters with high bandwidths can eliminate front end filters and provide a power and cost-efficient solution. Data transmission is done digitally and modulated and demodulated via software. This thesis explored the design of high speed, low power data converters for software-defined radio applications. Data converter architectures were considered in detail before selecting a binary search method with capacitor-based digital to analog converters. This architecture was chosen due to its intrinsic compatibility with the short channel manufacturing process. The final design was adaptable to smaller nodes in next generation manufacturing processes. A full system-level model was included with transistor-level implementation for the front end track and hold and comparator. The groundwork was set for future work on a complete design that features time interleaving. System-level analysis was performed on a variety of nonidealities, and correction schemes were proposed. A high speed, low power data converter was designed for software-defined radio applications.
Author: Muhamamd Z. Ali
Publisher:
ISBN:
Category : Analog-to-digital converters
Languages : en
Pages : 83
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Book Description
Increasing data requirements have created a frequency shortage that has led to a wider spectrum being used for wireless data transmission. In a transceiver, analog-to-digital converters are rate-limiting steps that require a radio frequency filter in the front end design to operate effectively. Data converters with high bandwidths can eliminate front end filters and provide a power and cost-efficient solution. Data transmission is done digitally and modulated and demodulated via software. This thesis explored the design of high speed, low power data converters for software-defined radio applications. Data converter architectures were considered in detail before selecting a binary search method with capacitor-based digital to analog converters. This architecture was chosen due to its intrinsic compatibility with the short channel manufacturing process. The final design was adaptable to smaller nodes in next generation manufacturing processes. A full system-level model was included with transistor-level implementation for the front end track and hold and comparator. The groundwork was set for future work on a complete design that features time interleaving. System-level analysis was performed on a variety of nonidealities, and correction schemes were proposed. A high speed, low power data converter was designed for software-defined radio applications.
Author: Tony J. Rouphael
Publisher: Newnes
ISBN: 0080941737
Category : Computers
Languages : en
Pages : 396
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Book Description
Understand the RF and Digital Signal Processing Principles Driving Software-defined Radios!Software-defined radio (SDR) technology is a configurable, low cost, and power efficient solution for multimode and multistandard wireless designs. This book describes software-defined radio concepts and design principles from the perspective of RF and digital signal processing as performed within this system. After an introductory overview of essential SDR concepts, this book examines signal modulation techniques, RF and digital system analysis and requirements, Nyquist and oversampled data conversion techniques, and multirate digital signal processing.. KEY TOPICS•Modulation techniquesMaster analog and digital modulation schemes•RF system-design parametersExamine noise and link budget analysis and Non-linear signal analysis and design methodology•Essentials of baseband and bandpass sampling and gain controlIF sampling architecture compared to traditional quadrature sampling, Nyquist zones, automatic gain control, and filtering•Nyquist sampling converter architecturesAnalysis and design of various Nyquist data converters•Oversampled data converter architecturesAnalysis and design of continuous-time and discrete-time Delta-Sigma converters•Multirate signal processing Gain knowledge of interpolation, decimation, and fractional data rate conversion*Offers readers a powerful set of analytical and design tools*Details real world designs*Comprehensive coverage makes this a must have in the RF/Wireless industry
Author: Alexander M. Wyglinski
Publisher: Artech House
ISBN: 1630814598
Category : Technology & Engineering
Languages : en
Pages : 375
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Book Description
Based on the popular Artech House classic, Digital Communication Systems Engineering with Software-Defined Radio, this book provides a practical approach to quickly learning the software-defined radio (SDR) concepts needed for work in the field. This up-to-date volume guides readers on how to quickly prototype wireless designs using SDR for real-world testing and experimentation. This book explores advanced wireless communication techniques such as OFDM, LTE, WLA, and hardware targeting. Readers will gain an understanding of the core concepts behind wireless hardware, such as the radio frequency front-end, analog-to-digital and digital-to-analog converters, as well as various processing technologies. Moreover, this volume includes chapters on timing estimation, matched filtering, frame synchronization message decoding, and source coding. The orthogonal frequency division multiplexing is explained and details about HDL code generation and deployment are provided. The book concludes with coverage of the WLAN toolbox with OFDM beacon reception and the LTE toolbox with downlink reception. Multiple case studies are provided throughout the book. Both MATLAB and Simulink source code are included to assist readers with their projects in the field.
Author: Mohammed Ismail
Publisher: Springer Science & Business Media
ISBN: 1402048246
Category : Technology & Engineering
Languages : en
Pages : 341
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Book Description
Radio Design in Nanometer Technologies is the first volume that looks at the integrated radio design problem as a "piece of a big puzzle", namely the entire chipset or single chip that builds an entire wireless system. This is the only way to successfully design radios to meet the stringent demands of today’s increasingly complex wireless systems.
Author: Vito Giannini
Publisher: Springer Science & Business Media
ISBN: 1402065388
Category : Technology & Engineering
Languages : en
Pages : 151
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Book Description
This is the first book to describe most of the issues involved in the transition from a single standard to a Software Radio based wireless terminal. The book is both a technology tutorial for beginners as well as a starting point for technical professionals in the communication and IC design industry who are approaching the design of a Software Defined Radio. A complete overview of the actual state-of-art for reconfigurable transceivers is given in detail.
Author: Amir Zjajo
Publisher: Springer Science & Business Media
ISBN: 9048197252
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
With the fast advancement of CMOS fabrication technology, more and more signal-processing functions are implemented in the digital domain for a lower cost, lower power consumption, higher yield, and higher re-configurability. This has recently generated a great demand for low-power, low-voltage A/D converters that can be realized in a mainstream deep-submicron CMOS technology. However, the discrepancies between lithography wavelengths and circuit feature sizes are increasing. Lower power supply voltages significantly reduce noise margins and increase variations in process, device and design parameters. Consequently, it is steadily more difficult to control the fabrication process precisely enough to maintain uniformity. The inherent randomness of materials used in fabrication at nanoscopic scales means that performance will be increasingly variable, not only from die-to-die but also within each individual die. Parametric variability will be compounded by degradation in nanoscale integrated circuits resulting in instability of parameters over time, eventually leading to the development of faults. Process variation cannot be solved by improving manufacturing tolerances; variability must be reduced by new device technology or managed by design in order for scaling to continue. Similarly, within-die performance variation also imposes new challenges for test methods. In an attempt to address these issues, Low-Power High-Resolution Analog-to-Digital Converters specifically focus on: i) improving the power efficiency for the high-speed, and low spurious spectral A/D conversion performance by exploring the potential of low-voltage analog design and calibration techniques, respectively, and ii) development of circuit techniques and algorithms to enhance testing and debugging potential to detect errors dynamically, to isolate and confine faults, and to recover errors continuously. The feasibility of the described methods has been verified by measurements from the silicon prototypes fabricated in standard 180nm, 90nm and 65nm CMOS technology.
Author: Kenichi Okada
Publisher: Springer Science & Business Media
ISBN: 144198514X
Category : Technology & Engineering
Languages : en
Pages : 224
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Book Description
This book describes the state-of-the-art in RF, analog, and mixed-signal circuit design for Software Defined Radio (SDR). It synthesizes for analog/RF circuit designers the most important general design approaches to take advantage of the most recent CMOS technology, which can integrate millions of transistors, as well as several real examples from the most recent research results.
Author: Islam T. Abougindia
Publisher:
ISBN:
Category : Analog-to-digital converters
Languages : en
Pages : 254
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Book Description
Ultra-wideband (UWB) communications and software defined radio (SDR) have been widely researched topics for the past several years. This is mainly because of the increased demand for robust, multi-purpose, and reconfigurable high data rate wireless communication systems with low energy consumption. Moreover, limited availability of RF spectrum bands for commercial use and variations of them from one country to another demand the wireless-capable devices to have greater re-configurability. Therefore, the communication systems of the future will not only have to allow multiple application usage, but also properly operate in a variety of environments with many other communication systems. Applications of these technologies range from short range battlefield military communication, interoperability of different radio signals, and wireless indoor data transfer and connectivity, to wireless sensor networks that require continuous data transmission. High-speed, medium resolution (5-8bits), and low-power analog-to-digital converters (ADCs) are essential components of most high data transfer rate communication systems. In UWB systems, as well as digital oscilloscopes, SDRs, and many other high speed communication applications, the speed and resolution of the ADC blocks limit communication systems from covering wide frequency bands. The intent of the work presented in this dissertation is to review and disclose the research findings on novel analog-to-digital converter structures designed for high-speed medium to high resolution, and re-configurable structures for UWB and SDR applications. The technical inquiry is divided into four research objectives. The first objective is to investigate fundamental principles, architectures, and transistor-circuit-system level limitations and design challenges of available state of the art ADC topologies for UWB and SDR applications. The second objective is to develop novel ADC topologies by utilizing asynchronous signal processing functionalities and by using hybrid structures to overcome the architecture level limits. The third objective is to study the main causes of high-speed ADC imperfections and develop novel correction techniques to achieve better performance. The fourth objective is to realize those novel ADC structures and the correction techniques on silicon and compare actual measurements with the simulation results as a proof of concept. The research outcomes include: (1) understanding the challenges of high-speed ADC design, (2) understanding the challenges in the design of flexible ADC architectures that can easily be re-configured between high data rate-medium resolution and low data rate-high resolution operations, (3) understanding the impact of circuits non-idealities on the overall ADC performance, and the different techniques used to reduce them, (4) developing novel and efficient techniques to correct for the top contributors of the circuits non-idealities, and (5) developing novel ADC architectures that can fulfill the requirements of UWB and SDR systems. The intellectual merits include: Two asynchronous time-interleaved (TI) type ADC architectures and a novel and efficient offset correction technique targeting set goals of the research are reported in this dissertation. The novel coarse-fine-calibration (CFC) offset correction technique was developed for increasing the accuracy of comparators used in ADCs while maintaining small area and power consumption for correction circuits. Major contributions of this research are: (1) design of a novel offset correction technique for dynamic latched comparators that are the key blocks in most ADC topologies to improve its sampling speed and the bit resolution, (2) design of a new asynchronous successive approximation register (ASAR) ADC in a time-interleaved structure, (3) design of a novel asynchronous two bit per stage, binary search ADC with indirect reference switching (ABS-IRS) in a time-interleaved structure, and (4) design, implementation, and testing of the three structures on silicon.
Author: Xinpeng Xing
Publisher: Springer
ISBN: 3319665650
Category : Technology & Engineering
Languages : en
Pages : 200
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Book Description
This book discusses both architecture- and circuit-level design aspects of voltage-controlled-oscillator (VCO)-based analog-to-digital converters (ADCs), especially focusing on mitigation of VCO nonlinearity and the improvement of power efficiency. It shows readers how to develop power-efficient complementary-metal-oxide-semiconductor (CMOS) ADCs for applications such as LTE, 802.11n, and VDSL2+. The material covered can also be applied to other specifications and technologies. Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems begins with a general introduction to the applications of an ADC in communications systems and the basic concepts of VCO-based ADCs. The text addresses a wide range of converter architectures including open- and closed-loop technologies. Special attention is paid to the replacement of power-hungry analog blocks with VCO-based circuits and to the mitigation of VCO nonline arity. Various MATLAB®/Simulink® models are provided for important circuit nonidealities, allowing designers and researchers to determine the required specifications for the different building blocks that form the systematic integrated-circuit design procedure. Five different VCO-based ADC design examples are presented, introducing innovations at both architecture and circuit levels. Of these designs, the best power efficiency of a high-bandwidth oversampling ADC is achieved in a 40 nm CMOS demonstration. This book is essential reading material for engineers and researchers working on low-power-analog and mixed-signal design and may be used by instructors teaching advanced courses on the subject. It provides a clear overview and comparison of VCO-based ADC architectures and gives the reader insight into the most important circuit imperfections.
Author: Alonso Morgado
Publisher: Springer Science & Business Media
ISBN: 1461400376
Category : Technology & Engineering
Languages : en
Pages : 297
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Book Description
This book presents innovative solutions for the implementation of Sigma-Delta Modulation (SDM) based Analog-to-Digital Conversion (ADC), required for the next generation of wireless hand-held terminals. These devices will be based on the so-called multi-standard transceiver chipsets, integrated in nanometer CMOS technologies. One of the most challenging and critical parts in such transceivers is the analog-digital interface, because of the assorted signal bandwidths and dynamic ranges that can be required to handle the A/D conversion for several operation modes. This book describes new adaptive and reconfigurable SDM ADC topologies, circuit strategies and synthesis methods, specially suited for multi-standard wireless telecom systems and future Software-defined-radios (SDRs) integrated in nanoscale CMOS. It is a practical book, going from basic concepts to the frontiers of SDM architectures and circuit implementations, which are explained in a didactical and systematic way. It gives a comprehensive overview of the state-of-the-art performance, challenges and practical solutions, providing the necessary insight to implement successful design, through an efficient design and synthesis methodology. Readers will learn a number of practical skills – from system-level design to experimental measurements and testing.
