Design Of Power Efficient Highly Digital Analog To Digital Converters For Next Generation Wireless Communication Systems

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Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems

Author : Xinpeng Xing
Publisher : Springer
ISBN 13 : 3319665650
Total Pages : 200 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems by : Xinpeng Xing

Download or read book Design of Power-Efficient Highly Digital Analog-to-Digital Converters for Next-Generation Wireless Communication Systems written by Xinpeng Xing and published by Springer. This book was released on 2017-10-04 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Low-Power High-Resolution Analog to Digital Converters

Author : Amir Zjajo
Publisher : Springer Science & Business Media
ISBN 13 : 9048197252
Total Pages : 311 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Low-Power High-Resolution Analog to Digital Converters by : Amir Zjajo

Download or read book Low-Power High-Resolution Analog to Digital Converters written by Amir Zjajo and published by Springer Science & Business Media. This book was released on 2010-10-29 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits

Author : Andrea Baschirotto
Publisher : Springer Nature
ISBN 13 : 3030252671
Total Pages : 324 pages
Book Rating : 4.0/5 (32 download)

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Book Synopsis Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits by : Andrea Baschirotto

Download or read book Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits written by Andrea Baschirotto and published by Springer Nature. This book was released on 2019-10-24 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on the 18 tutorials presented during the 28th workshop on Advances in Analog Circuit Design. Expert designers present readers with information about a variety of topics at the frontier of analog circuit design, including next-generation analog-to-digital converters , high-performance power management systems and technology considerations for advanced IC design. For anyone involved in analog circuit research and development, this book will be a valuable summary of the state-of-the-art in these areas. Provides a summary of the state-of-the-art in analog circuit design, written by experts from industry and academia; Presents material in a tutorial-based format; Includes coverage of next-generation analog-to-digital converters, high-performance power management systems, and technology considerations for advanced IC design.

6G and Onward to Next G

Author : Martin Maier
Publisher : John Wiley & Sons
ISBN 13 : 1119898544
Total Pages : 308 pages
Book Rating : 4.1/5 (198 download)

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Book Synopsis 6G and Onward to Next G by : Martin Maier

Download or read book 6G and Onward to Next G written by Martin Maier and published by John Wiley & Sons. This book was released on 2023-02-07 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book weaves emerging themes in future 6G and Next G networks carefully together. It points to three spheres of contexts with different narratives for the year 2030 and beyond, in which the coming Metaverse as the precursor of the future Multiverse can be embedded naturally. The book aims at providing the reader with new cross-disciplinary research material, ranging from communication and computer science to cognitive science, social sciences, and behavioral economics, for building a deeper Metaverse. It will be instrumental in helping the reader find and overcome some of the most common 6G and Next G blind spots. Modern networks are more than communication and computer science. They may be better viewed as techno-social systems that exhibit complex adaptive system behavior and resemble biological superorganisms. 6G and especially Next G should go beyond continuing the linear incremental 6G=5G+1G mindset of past generations of mobile networks. To this end, the book: Helps readers inquire into new areas of knowledge or understanding that they didn’t have or didn't pay attention to find their 6G/Next G blind spots Highlights the unique potential benefits of the virtual world for society in that it provides a useful extension of the real-world economy by compensating for its well-known market failures, e.g., rising income inequality Provides a comprehensive description of the original Metaverse vision and highlights the different Metaverse components, applications, open research challenges, and early Metaverse deployment examples from both industry and academia Describes how the Multiverse goes beyond the Metaverse origins and explores the importance of experience innovation since experiences play a central role in the Metaverse Explains Web3 and the emerging field of token engineering and tokenization, i.e., the process of creating tokenized digital twins via programmable tokens, which are viewed as the killer application of Web3 networks for creating technology-enabled social organisms and restoring tech-driven common goods Reviews anticipated 6G paradigm shifts and elaborates on the difference between 6G and Next G research, including Next G Alliance's audacious goals and their symbiotic relationship between technology and a population's societal and economic needs Doubles down on the mutually beneficial symbiosis between digitalization and biologization for our possible evolution into future metahumans with infinite capabilities by making us smarter and creating a fundamentally new form of sociality in the Metaverse and Multiverse as well as the future stigmergy enhanced Society 5.0 by leveraging on time-tested self-organization mechanisms borrowed from nature Presents a variety of different concepts of the true nature of reality that bring us closer to the original Metaverse vision and explains how 6G, Next G, and the Metaverse may eventually pave the way to the peak-experience machine that democratizes access to the upper range of human experiences Touches on the possible transition from communication to services beyond communication, most notably the cross-cultural phenomenon of communitas in anthropology and its increasing degrees of perceived connectedness with others, the world, and oneself, given the importance of creating a deep sense of community in the Metaverse Written for students, network researchers, professionals, engineers, and practitioners, 6G and Onward to Next G: The Road to the Multiverse explores the latest Internet developments, with a particular focus on 6G and Next G networks in the context of the emerging Metaverse and future Multiverse as the successors of today’s mobile Internet that has defined the last two decades.

Power Efficient Analog-to-digital Converters Using Both Voltage and Time Domain Information

Author : Taehwan Oh
Publisher :
ISBN 13 :
Total Pages : 87 pages
Book Rating : 4.:/5 (847 download)

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Book Synopsis Power Efficient Analog-to-digital Converters Using Both Voltage and Time Domain Information by : Taehwan Oh

Download or read book Power Efficient Analog-to-digital Converters Using Both Voltage and Time Domain Information written by Taehwan Oh and published by . This book was released on 2013 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: As advanced wired and wireless communication systems attempt to achieve higher performance, the demand for high resolution and wide signal bandwidth in their associated ADCs is strongly increased. Recently, time-domain quantization has drawn attention from its scalability in deep submicron CMOS processes. Furthermore, there are several interesting aspects of time-domain quantizer by processing the signal in time rather than only in voltage domain especially for power efficiency. This research focuses on developing a new architecture for power efficient, high resolution ADCs using both voltage and time domain information. As a first approach, a new [delta sigma] ADC based on a noise-shaped two-step integrating quantizer which quantizes the signal in voltage and time domains is presented. Attaining an extra order of noise-shaping from the integrating quantizer, the proposed [delta sigma] ADC manifests a second-order noise-shaping with a first-order loop filter. Furthermore, this quantizer provides an 8b uantization in itself, drastically reducing the oversampling requirement. The proposed ADC also incorporates a new feedback DAC topology that alleviates the feedback DAC complexity of a two-step 8b quantizer. The measured results of the prototype ADC implemented in a 0.13[micro]m CMOS demonstrate peak SNDR of 70.7dB (11.5b ENOB) at 8.1mW power, with an 8x OSR at 80MHz sampling frequency. To further improve ADC performance, a Nyquist ADC based on a time-based pipelined TDC is also proposed as a second approach. In this work, a simple V-T conversion scheme with a cheap low gain amplifier in its first stage and a hybrid time-domain quantization stage based on simple charge pump and capacitive DAC in its backend stages, are also proposed to improve ADC linearity and power efficiency. Using voltage and time domain information, the proposed ADC architecture is beneficial for both resolution and power efficiency, with MSBs resolved in voltage domain and LSBs in time domain. The measured results of the prototype ADC implemented in a 0.13[micro]m CMOS demonstrate peak SNDR of 69.3dB (11.2b ENOB) at 6.38mW power and 70MHz sampling frequency. The FOM is 38.2fJ/conversion-step.

Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters

Author : Sai-Weng Sin
Publisher : Springer
ISBN 13 : 9789048197095
Total Pages : 134 pages
Book Rating : 4.1/5 (97 download)

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Book Synopsis Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters by : Sai-Weng Sin

Download or read book Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters written by Sai-Weng Sin and published by Springer. This book was released on 2010-10-07 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analog-to-Digital Converters (ADCs) play an important role in most modern signal processing and wireless communication systems where extensive signal manipulation is necessary to be performed by complicated digital signal processing (DSP) circuitry. This trend also creates the possibility of fabricating all functional blocks of a system in a single chip (System On Chip - SoC), with great reductions in cost, chip area and power consumption. However, this tendency places an increasing challenge, in terms of speed, resolution, power consumption, and noise performance, in the design of the front-end ADC which is usually the bottleneck of the whole system, especially under the unavoidable low supply-voltage imposed by technology scaling, as well as the requirement of battery operated portable devices. Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters will present new techniques tailored for low-voltage and high-speed Switched-Capacitor (SC) ADC with various design-specific considerations.

Smart Antennas

Author : Praveen Kumar Malik
Publisher : Springer Nature
ISBN 13 : 3030766365
Total Pages : 421 pages
Book Rating : 4.0/5 (37 download)

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Book Synopsis Smart Antennas by : Praveen Kumar Malik

Download or read book Smart Antennas written by Praveen Kumar Malik and published by Springer Nature. This book was released on 2022-02-03 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest techniques for the design of antenna, focusing specifically on the microstrip antenna. The authors discuss antenna structure, defected ground, MIMO, and fractal design. The book provides the design of microstrip antenna in terms of latest applications and uses in areas like IoT and device-to-device communication. The book also provides the current methods and techniques used for the enhancement of the performance parameters of the microstrip antenna. Chapters enhance the knowledge and skills of students and researchers in the latest in the communications world like IoT, D2D, satellite, wearable devices etc. The authors discuss applications such as microwave imaging, medical implants, hyperthermia treatments, and wireless wellness monitoring and how a decrease in size of antenna help facilitate application potential. Provides the latest techniques used for the design of antenna in terms of its structure, defected ground, MIMO and fractal design; Outlines steps to resolve issues with designing antenna, including the latest design and design parameters for microstrip antenna; Presents the design of conformal and miniaturized antenna structures for various applications.

Advances in Analog and RF IC Design for Wireless Communication Systems

Author : Gabriele Manganaro
Publisher : Academic Press
ISBN 13 : 0123983320
Total Pages : 311 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Advances in Analog and RF IC Design for Wireless Communication Systems by : Gabriele Manganaro

Download or read book Advances in Analog and RF IC Design for Wireless Communication Systems written by Gabriele Manganaro and published by Academic Press. This book was released on 2013-05-13 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Analog and RF IC Design for Wireless Communication Systems gives technical introductions to the latest and most significant topics in the area of circuit design of analog/RF ICs for wireless communication systems, emphasizing wireless infrastructure rather than handsets. The book ranges from very high performance circuits for complex wireless infrastructure systems to selected highly integrated systems for handsets and mobile devices. Coverage includes power amplifiers, low-noise amplifiers, modulators, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs), and even single-chip radios. This book offers a quick grasp of emerging research topics in RF integrated circuit design and their potential applications, with brief introductions to key topics followed by references to specialist papers for further reading. All of the chapters, compiled by editors well known in their field, have been authored by renowned experts in the subject. Each includes a complete introduction, followed by the relevant most significant and recent results on the topic at hand. This book gives researchers in industry and universities a quick grasp of the most important developments in analog and RF integrated circuit design. Emerging research topics in RF IC design and its potential application Case studies and practical implementation examples Covers fundamental building blocks of a cellular base station system and satellite infrastructure Insights from the experts on the design and the technology trade-offs, the challenges and open questions they often face References to specialist papers for further reading

Next Generation Wireless Terahertz Communication Networks

Author : Saim Ghafoor
Publisher : CRC Press
ISBN 13 : 1000416372
Total Pages : 559 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Next Generation Wireless Terahertz Communication Networks by : Saim Ghafoor

Download or read book Next Generation Wireless Terahertz Communication Networks written by Saim Ghafoor and published by CRC Press. This book was released on 2021-08-11 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth of the data traffic demands new ways to achieve high-speed wireless links. The backbone networks, data centers, mission-critical applications, as well as end-users sitting in office or home, all require ultra-high throughput and ultra-low latency wireless links. Sophisticated technological advancement and huge bandwidth are required to reduce the latency. Terahertz band, in this regard, has a huge potential to provide these high-capacity links where a user can download the file in a few seconds. To realize the high-capacity wireless links for future applications, in this book, different aspects of the Terahertz band wireless communication network are presented. This book highlights the Terahertz channel characteristics and modeling, antenna design and beamforming, device characterization, applications, and protocols. It also provides state-of-the-art knowledge on different communication aspects of Terahertz communication and techniques to realize the true potential of the Terahertz band for wireless communication.

Design Techniques for Ultra-High-Speed Time-Interleaved Analog-to-Digital Converters

Author : Yida Duan
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (994 download)

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Book Synopsis Design Techniques for Ultra-High-Speed Time-Interleaved Analog-to-Digital Converters by : Yida Duan

Download or read book Design Techniques for Ultra-High-Speed Time-Interleaved Analog-to-Digital Converters written by Yida Duan and published by . This book was released on 2015 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analog-to-Digital Converters (ADCs) serve as the interfaces between the analog natural world and the binary world of computer data. Due to this essential role, ADC circuits have been well studied over 40 years, and many problems associated with them have already been solved. However in recent years, a new species of ADCs has appeared, and since then attracted lots of attention. These are ultra-high-speed (often greater than 40GS/s) time-interleaved ADCs of low or medium resolution (around 6 to 8 bit) built in CMOS processes. Although such ADCs can be used in high-speed electronic measurement equipment and radar systems, the recent driving force behind them is next generation 100Gbps/400Gbps fiber optical transceivers. These transceivers take advantage of ultra-high-speed ADCs and digital-signal-processors (DSPs) to enable ultra-high data-rate communications in long-haul networks (city-to-city, transcontinental, and transoceanic fiber links), metro networks (fibers that connect enterprises in metropolitan areas), and data centers (fiber links within data center infrastructures). At such high sampling rate, massively time-interleaved successive-approximation ADC (SAR ADC) architecture has emerged as the dominant solution due to its excellent power efficiency. Several recent works has demonstrated success in achieving high sampling rate. However, the sampling network has become the bottleneck that limits the input bandwidth in these ADCs. It is apparent that conventional switch-based track-and-hold (T&H) circuit cannot satisfy the >20GHz bandwidth requirement. In addition, it is unclear what the optimal interleaving configuration is. Each state-of-the-art design adopts a different interleaving configuration - from straightforward conventional 1-rank interleaving to 2-rank hierarchical sampling or even 3 ranks. How to partition interleaving factors among different ranks has not yet been investigated. Furthermore, asynchronous SAR sub-ADCs are often used in these designs to push the sampling rate even further. The well-known sparkle-code issues caused by comparator meta-stability in asynchronous SARs can significantly increase the Bit-Error-Rate (BER) of the transceivers unless power hungry error correction coding are implemented in the system. Although many works in the literature attempted to deal with the meta-stability in asynchronous SARs, the effectiveness of these approaches have not been fully demonstrated. In this thesis, I will first propose a new cascode-based T&H circuits to improve the ADC bandwidth beyond the limit of conventional switch-based T&H circuits. Then, a system design and optimization methodology of hierarchical time-interleaved sampling network is presented in the context of cascode T&H. To deal with sparkle-code issue in asynchronous SAR sub-ADCs, a new back-end meta-stability correction technique is employed. An extensive statistical analysis is provided to verify the correction algorithm can greatly reduce sparkle-code error-rates. To further demonstrate the effectiveness of the proposed circuits and techniques, two prototype ADCs have been implemented. The first 7b 12.5GS/s hierarchically time-interleaved ADC in 65nm CMOS process demonstrates 29.4dB SNDR and >25GHz bandwidth. The later 6b 46GS/s ADC in 28nm CMOS employs asynchronous SAR sub-ADC design with back-end meta-stability correction. The measurement results show it achieves sparkle-code error free operation over 1e10 samples in addition to achieving >23GHz bandwidth and 25.2dB SNDR. The power consumption is 381mW from 1.05V/1.6V supplies, and the FOM is 0.56pJ/conversion-step.

Low Power Analog to Digital Converter Design for Software-defined Radios

Author : Muhamamd Z. Ali
Publisher :
ISBN 13 :
Total Pages : 83 pages
Book Rating : 4.:/5 (884 download)

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Book Synopsis Low Power Analog to Digital Converter Design for Software-defined Radios by : Muhamamd Z. Ali

Download or read book Low Power Analog to Digital Converter Design for Software-defined Radios written by Muhamamd Z. Ali and published by . This book was released on 2014 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems

Author : Vijay Nath
Publisher : Springer Nature
ISBN 13 : 981155546X
Total Pages : 1078 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems by : Vijay Nath

Download or read book Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems written by Vijay Nath and published by Springer Nature. This book was released on 2020-09-19 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents high-quality papers from the Fourth International Conference on Microelectronics, Computing & Communication Systems (MCCS 2019). It discusses the latest technological trends and advances in MEMS and nanoelectronics, wireless communication, optical communication, instrumentation, signal processing, image processing, bioengineering, green energy, hybrid vehicles, environmental science, weather forecasting, cloud computing, renewable energy, RFID, CMOS sensors, actuators, transducers, telemetry systems, embedded systems and sensor network applications. It includes papers based on original theoretical, practical and experimental simulations, development, applications, measurements and testing. The applications and solutions discussed here provide excellent reference material for future product development.

Time-to-Digital Converters

Author : Stephan Henzler
Publisher : Springer Science & Business Media
ISBN 13 : 9048186285
Total Pages : 132 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Time-to-Digital Converters by : Stephan Henzler

Download or read book Time-to-Digital Converters written by Stephan Henzler and published by Springer Science & Business Media. This book was released on 2010-03-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-electronics and so integrated circuit design are heavily driven by technology scaling. The main engine of scaling is an increased system performance at reduced manufacturing cost (per system). In most systems digital circuits dominate with respect to die area and functional complexity. Digital building blocks take full - vantage of reduced device geometries in terms of area, power per functionality, and switching speed. On the other hand, analog circuits rely not on the fast transition speed between a few discrete states but fairly on the actual shape of the trans- tor characteristic. Technology scaling continuously degrades these characteristics with respect to analog performance parameters like output resistance or intrinsic gain. Below the 100 nm technology node the design of analog and mixed-signal circuits becomes perceptibly more dif cult. This is particularly true for low supply voltages near to 1V or below. The result is not only an increased design effort but also a growing power consumption. The area shrinks considerably less than p- dicted by the digital scaling factor. Obviously, both effects are contradictory to the original goal of scaling. However, digital circuits become faster, smaller, and less power hungry. The fast switching transitions reduce the susceptibility to noise, e. g. icker noise in the transistors. There are also a few drawbacks like the generation of power supply noise or the lack of power supply rejection.

Analysis of Alternative Massive MIMO Designs

Author : Daniel Verenzuela
Publisher : Linköping University Electronic Press
ISBN 13 : 9176853233
Total Pages : 62 pages
Book Rating : 4.1/5 (768 download)

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Book Synopsis Analysis of Alternative Massive MIMO Designs by : Daniel Verenzuela

Download or read book Analysis of Alternative Massive MIMO Designs written by Daniel Verenzuela and published by Linköping University Electronic Press. This book was released on 2018-03-15 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of information and communication technologies (ICT) provides the means for reaching global connectivity that can help humanity progress and prosper. This comes with high demands on data traffic and number of connected devices which are rapidly growing and need to be met by technological development. Massive MIMO, where MIMO stands for multiple-input multiple-output, is envisioned as a fundamental component of next generation wireless communications for its ability to provide high spectral and energy efficiency, SE and EE, respectively. The key feature of this technology is the use of a large number of antennas at the base stations (BS) to spatially multiplex several user equipments (UEs). In the development of new technologies like Massive MIMO, many design alternatives need to be evaluated and compared in order to find the best operating point with a preferable tradeoff between high performance and low cost. In this thesis, two alternative designs for signal processing and hardware in Massive MIMO are studied and compared with the baseline operation in terms of SE, EE, and power consumption. The first design is called superimposed pilot (SP) transmission and is based on superimposing pilot and data symbols to remove the overhead from pilot transmission and reduce pilot contamination. The second design is mixed analog-to-digital converters (ADCs) and it aims at balancing high performance and low complexity by allowing different ADC bit resolutions across the BS antennas. The results show that the baseline operation of Massive MIMO, properly optimized, is the preferred choice. However, SP and mixed ADCs still have room for improvement and further study is needed to ascertain the full capabilities of these alternative designs.

Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters

Author : Frank Ohnhäuser
Publisher : Springer
ISBN 13 : 3662470209
Total Pages : 340 pages
Book Rating : 4.6/5 (624 download)

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Book Synopsis Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters by : Frank Ohnhäuser

Download or read book Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters written by Frank Ohnhäuser and published by Springer. This book was released on 2015-07-01 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers students and those new to the topic of analog-to-digital converters (ADCs) a broad introduction, before going into details of the state-of-the-art design techniques for SAR and DS converters, including the latest research topics, which are valuable for IC design engineers as well as users of ADCs in applications. The book then addresses important topics, such as correct connectivity of ADCs in an application, the verification, characterization and testing of ADCs that ensure high-quality end products. Analog-to-digital converters are the central element in any data processing system and regulation loops such as modems or electrical motor drives. They significantly affect the performance and resolution of a system or end product. System development engineers need to be familiar with the performance parameters of the converters and understand the advantages and disadvantages of the various architectures. Integrated circuit development engineers have to overcome the problem of achieving high performance and resolution with the lowest possible power dissipation, while the digital circuitry generates distortion in supply, ground and substrate. This book explains the connections and gives suggestions for obtaining the highest possible resolution. Novel trends are illustrated in the design of analog-to-digital converters based on successive approximation and the difficulties in the development of continuous-time delta-sigma modulators are also discussed.

Time-interleaved Analog-to-Digital Converters

Author : Simon Louwsma
Publisher : Springer Science & Business Media
ISBN 13 : 9048197163
Total Pages : 148 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Time-interleaved Analog-to-Digital Converters by : Simon Louwsma

Download or read book Time-interleaved Analog-to-Digital Converters written by Simon Louwsma and published by Springer Science & Business Media. This book was released on 2010-09-08 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-interleaved Analog-to-Digital Converters describes the research performed on low-power time-interleaved ADCs. A detailed theoretical analysis is made of the time-interleaved Track & Hold, since it must be capable of handling signals in the GHz range with little distortion, and minimal power consumption. Timing calibration is not attractive, therefore design techniques are presented which do not require timing calibration. The design of power efficient sub-ADCs is addressed with a theoretical analysis of a successive approximation converter and a pipeline converter. It turns out that the first can consume about 10 times less power than the latter, and this conclusion is supported by literature. Time-interleaved Analog-to-Digital Converters describes the design of a high performance time-interleaved ADC, with much attention for practical design aspects, aiming at both industry and research. Measurements show best-inclass performance with a sample-rate of 1.8 GS/s, 7.9 ENOBs and a power efficiency of 1 pJ/conversion-step.

Adaptive, Wideband Analog-to-digital Conversion for Convergent Communication Systems

Author : Robert D. Batten
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (314 download)

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Book Synopsis Adaptive, Wideband Analog-to-digital Conversion for Convergent Communication Systems by : Robert D. Batten

Download or read book Adaptive, Wideband Analog-to-digital Conversion for Convergent Communication Systems written by Robert D. Batten and published by . This book was released on 2009 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exponential rate of advances in modern communication devices in the last several years have brought us higher levels of functionality and performance as well as reductions in physical size and power consumption. To continue this rate of advancement, next generation systems require wider bandwidth and higher resolution ADCs. Additionally, in order for ADCs to be used in a wide range of applications, reconfigurability and adaptability are critical features of future ADCs. Reconfigurable ADC architectures allow consolidation of receivers for multiple communication standards into one, providing size, power and functionality improvements over multiple discrete ADCs. This thesis presents a high performance track-and-hold block and reconfigurable high performance ADC for multi-functional communication applications. In the design of analog-to-digital converters (ADCs), the front-end track-and-hold or sample-and-hold is often one of the most challenging parts of the design. Open-loop designs with high sample rates are reaching the limits of their linearity. Presented here is a high-speed, high-resolution closed-loop track-and-hold in a 0.18um SiGe BiCMOS technology. The architecture provides both high linearity and high speed, with 98.7dB and 89.4dB SNDR at 50MS/s and 100MS/s, respectively. As these specifications evolve to meet customer demands, new, high performance ADCs are needed. To this end, an efficient parallel [Delta Sigma] ADC architecture has been designed that achieves high performance in digital processes, while also providing additional architecture flexibility. This ADC, consisting of four parallel [Delta Sigma] ADCs and a single pipeline ADC provides high performance and reconfigurablity. This ADC is suited to applications requiring not only wide-bandwidth, high resolution signal conversion but an on-the-fly reconfigurable resolution and bandwidth.