Author: Golsa Ghiaasi-Hafezi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Abstract: In this thesis the design of low phase noise frequency synthesizers for emerging wireless applications is investigated. The future wireless applications employ Orthogonal Frequency Division Multiplexing (OFDM) in order to combat the harsh mobile environment effects on the signal, such as Doppler effect or Multi-path fading. However, OFDM imposes the stringent integrated phase noise requirement to maintain the orthogonality of the subcarriers. The emerging applications also require broadband functionality to cover the multiple bands specified by different application using a single frequency synthesizer. Particularly, this thesis focuses on the design of SD fractional-N frequency synthesizers for OFDM based applications. SD fractional-N PLLs have proven to be a very good candidate for the emerging OFDM-based radios which require employment of fast switching low phase noise frequency synthesizers. The issue of spectral Purity in SD PLLs is discussed, and the issue of phase noise and fractional spurs is investigated. Considering the loop dynamics, the optimal design for low phase noise is described. The problem of noise folding and its impact on spur cancellation is studied. A type-I second order PLL is designed which inherently eliminates the sources of nonlinearity in the signal path. The LO generation scheme is proposed to cover the three bands of WiMAX application centered at 2.5, 3.5 and 5.5 GHz by utilizing a broadband PLL. The design employs a uniformly sampled two state PFD and a discrete on-chip filter. A cancellation DAC in embedded in the PFD which is used to cancel out the phase induced by quantization error. The design enhances the noise folding and spur performance and satisfies the stringent integrated phase noise requirement of the application. As a critical part of the top-down design, a system study for a dual-band DVB-H tuner is presented. The tuner's various requirements in terms of linearity, gain and noise are derived. The required of phase noise of the PLL is calculated on the basis of the blocker profile of the tuner. The direct conversion architecture is adopted for the design and the specification of various blocks in the radio is derived in order to satisfy the required performance. The LO generation scheme for dual band local oscillator is proposed. Finally, the design of key circuits in the PLL loop is presented. The wideband VCO for triple WiMAX application is utilizing an amplitude regulation scheme to minimize supply pushing and improve the spectral purity. The high-speed multi-modulus divider design is presented. The design of high-speed broadband divide-by-32/33 dual modulus prescaler is described.
Author: Hiva Hedayati
Publisher:
ISBN:
Category : Frequency synthesizers
Languages : en
Pages : 166
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Book Description
Author: Andrea Leonardo Lacaita
Publisher: Cambridge University Press
ISBN: 1139466097
Category : Technology & Engineering
Languages : en
Pages : 9
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Book Description
The increasingly demanding performance requirements of communications systems, as well as problems posed by the continued scaling of silicon technology, present numerous challenges for the design of frequency synthesizers in modern transceivers. This book contains everything you need to know for the efficient design of frequency synthesizers for today's communications applications. If you need to optimize performance and minimize design time, you will find this book invaluable. Using an intuitive yet rigorous approach, the authors describe simple analytical methods for the design of phase locked loop (PLL) frequency synthesizers using scaled silicon CMOS and bipolar technologies. The entire design process, from system-level specification to layout, is covered comprehensively. Practical design examples are included, and implementation issues are addressed. A key problem-solving resource for practitioners in IC design, the book will also be of interest to researchers and graduate students in electrical engineering.
Author: Ulrich L. Rohde
Publisher: John Wiley & Sons
ISBN: 9780471520191
Category : Technology & Engineering
Languages : en
Pages : 664
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Book Description
Over the past decade, great strides have been made in the technology of microwave oscillators and synthesizers, with digital frequency synthesizers in particular attracting much attention. These synthesizers are now being used in virtually all modern signal generators and radio communication equipment. Until now, however, detailed information about their design has been hard to come by-much of it scattered through journal articles-and most books on the subject have taken a primarily theoretical approach. Enter Microwave and Wireless Synthesizers-the first book to emphasize both practical circuit information from RF to millimeter-wave frequencies and up-to-date theory. Based on course material taught by author Ulrich L. Rohde at George Washington University and recent work done by the author at Compact Software, Inc. and Synergy Microwave Corporation, this volume is a complete revision and update of Rohde's landmark text, Digital PLL Frequency Synthesizers: Theory and Design. While it provides all the necessary theory and formulas, it also offers an in-depth look at the practical side of the phase-lock loop (PLL) in synthesizers-including special loops, loop components, and practical circuits-material that is not available in any other book. Rohde explains loop fundamentals, demonstrates the linear approach to oscillator phase noise, discusses the digital direct synthesizer technique, addresses low noise oscillator design, and provides insight into the role and design of crystal oscillators, mixers, phase/frequency discriminators, wideband high-gain amplifiers, programmable dividers, and loop filters. He goes on to cover conventional multiloop synthesizers and survey existing state-of-the-art microwave synthesizer applications. Extensive appendices review the mathematics of useful functions and various applications, including even the complex nonlinear theory of noise in large signal systems such as mixers and oscillators. Microwave and Wireless Synthesizers allows anyone with a PC running either Windows 3.11 or Windows NT to explore real-world design. It uses programs for the solution of digital phase-lock loop systems, tabulates the results, and shows how Bode diagrams are determined by the computer's graphic capabilities. It also includes examples using commercially available linear and nonlinear CAD programs to provide accurate evaluation and optimization of oscillators and other useful circuits and many practical charts. For companies involved in test and communication equipment, this book reduces design and research costs by providing a large number of proven circuits and expediting the design process. It is also an outstanding senior/graduate level textbook for electrical engineering students and an invaluable resource for practicing engineers, senior engineers, and managers who would like to be able to evaluate new trends and techniques in the field.
Author: Ulrich L. Rohde
Publisher: John Wiley & Sons
ISBN: 1119666090
Category : Technology & Engineering
Languages : en
Pages : 816
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Book Description
The new edition of the leading resource on designing digital frequency synthesizers from microwave and wireless applications, fully updated to reflect the most modern integrated circuits and semiconductors Microwave and Wireless Synthesizers: Theory and Design, Second Edition, remains the standard text on the subject by providing complete and up-to-date coverage of both practical and theoretical aspects of modern frequency synthesizers and their components. Featuring contributions from leading experts in the field, this classic volume describes loop fundamentals, noise and spurious responses, special loops, loop components, multiloop synthesizers, and more. Practical synthesizer examples illustrate the design of a high-performance hybrid synthesizer and performance measurement techniques—offering readers clear instruction on the various design steps and design rules. The second edition includes extensively revised content throughout, including a modern approach to dealing with the noise and spurious response of loops and updated material on digital signal processing and architectures. Reflecting today’s technology, new practical and validated examples cover a combination of analog and digital synthesizers and hybrid systems. Enhanced and expanded chapters discuss implementations of direct digital synthesis (DDS) architectures, the voltage-controlled oscillator (VCO), crystal and other high-Q based oscillators, arbitrary waveform generation, vector signal generation, and other current tools and techniques. Now requiring no additional literature to be useful, this comprehensive, one-stop resource: Provides a fully reviewed, updated, and enhanced presentation of microwave and wireless synthesizers Presents a clear mathematical method for designing oscillators for best noise performance at both RF and microwave frequencies Contains new illustrations, figures, diagrams, and examples Includes extensive appendices to aid in calculating phase noise in free-running oscillators, designing VHF and UHF oscillators with CAD software, using state-of-the-art synthesizer chips, and generating millimeter wave frequencies using the delay line principle Containing numerous designs of proven circuits and more than 500 relevant citations from scientific journal and papers, Microwave and Wireless Synthesizers: Theory and Design, Second Edition, is a must-have reference for engineers working in the field of radio communication, and the perfect textbook for advanced electri
Author: 王裕翔
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
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Author: Han-xiong Lian
Publisher: iUniverse
ISBN: 1491748656
Category : Technology & Engineering
Languages : en
Pages : 418
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Book Description
Nowaday, the supper low noise PLL oscillator and the supper low jitter synthesizer have been used in the worldwide communications system. Where, the former is used for the satellite communications and the latter is used for the cellular phone. The main idea to obtain a supper low noise PLL oscillator is to use a high Q resonator, such as the dielectric resonator, with a suitable phase-locked loop. To design a supper low jitter synthesizer, the best way is to set up a solid background about the synthesizer, which includes: The analogy PLL oscillator (linear analysis and nonlinear analysis), The digital PLL oscillator, using the symbol analysis and the analog PLL analysis, The synthesizer, using the symbol analysis and the sample PLL analysis. Mean while, the digital-hybrid PLL can be used for the 10 Gbit/s data recovery in the 10 Gbit/s optical fiber transponder. This book will provide you all of those information. Meanwhile, provider you the design formulas, design examples and the final schematics. The author have been involved in the design and development of all of those projects above for almost 30 years. Therefore, this book is very clear not only in theoretical analysis but also in experimental.
Author: Kiat Seng Yeo
Publisher: World Scientific
ISBN: 9811270864
Category : Technology & Engineering
Languages : en
Pages : 358
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Book Description
With speeds of up to 20 gigabits per second and the ability to support up to one million devices per square kilometer, 5G — the current generation of mobile communications technology — may seem impressive, but 6G is set to take these capabilities even further. Envisioned to deliver a peak data rate of 1 terabit per second and latency of 100 microseconds or less, 6G must be able to seamlessly and securely deliver data in an ever increasingly saturated network of wireless connections without exceeding the energy requirements of 5G.This book covers every aspect of future communications, from key technologies, to design challenges, network requirements, and users experiences; to standardization, chip design, and industry applications from 5G to 6G. It presents the requirements and use cases of 6G, RF transceivers roadmap for 2030 and beyond, and modeling of RF devices for 5G/6G applications. In here, a modified Shannon's capacity formula that is critical for future advanced wireless communications such as 6G is discussed for the first time. It also presents the standardization of 6G wireless communication systems with emphasis on Standard Development Organizations (SDOs), regulatory bodies and administrations, ITU, industry forums, and 6G standard timeline. The book presents an RF/mm-wave integrated circuit design for future communications to provides readers with an easy-to-understand overview of voltage-controlled oscillators, power amplifiers, low-noise amplifiers, frequency synthesizers, high-frequency dividers, and chip-to-chip communications isolation technology.This book is an excellent reference for readers specializing in electrical and electronic engineering, wireless communication, integrated circuit design, circuits and systems, to learn more about 5G and even 6G communication standards and RF/mm-wave IC design. In particular, professionals working in the foundry, fabless semiconductor companies, original equipment manufacturers, and integrated device manufacturers will also benefit from this book.
Author: Taoufik Bourdi
Publisher: Springer Science & Business Media
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 232
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Book Description
In this book, the authors outline detailed design methodology for fast frequency hopping synthesizers for RF and wireless communications applications. There is great emphasis on fractional-N delta-sigma based phase locked loops from specifications, system analysis and architecture planning to circuit design and silicon implementation. The developed techniques in the book can help in designing very low noise, high speed fractional-N frequency synthesizers.
Author: Li Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
