QoS is an important subject which occupies a central place in overall packet network technologies. A complex subject, its analysis involves such mathematical disciplines as probability, random variables, stochastic pr...
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ISBN:
(数字)9780387233901
ISBN:
(纸本)038723389X;0387233903
QoS is an important subject which occupies a central place in overall packet network technologies. A complex subject, its analysis involves such mathematical disciplines as probability, random variables, stochastic processes and queuing. These mathematical subjects are abstract, not easy to grasp for uninitiated persons. QoS in Packet Networks is written with two objectives. The first explains the fundamental mathematical concepts used in QoS analysis as plainly as possible, in layman's terms to afford the reader a better appreciation of the subject of QoS treated in this book. The second explains in plain language, the various parts of QoS in packet networks, to provide the reader with a complete view of this complex and dynamic area of communications networking technology. Discussion of the functional requirements of the packet networks to provide QoS is included.
This book is based on my doctoral thesis at the Helsinki University of Technology. Several different projects during five years guided me from the basics of the RF IC design to the implementations of highly integrated...
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ISBN:
(数字)9780306475450
ISBN:
(纸本)0792376072
This book is based on my doctoral thesis at the Helsinki University of Technology. Several different projects during five years guided me from the basics of the RF IC design to the implementations of highly integrated radio receiver chips. Sharing time and effort between IC and system issues is not always straightforward. I have been lucky to follow both topics and share experiences with diligent and enthusiastic people having different specialities. As a result, this book will cover a wide range of different topics needed in the design of highly integrated radio receivers. Experiences from the first receiver prototypes for the third generation cellular systems form the basis of this book. Most of the issues are directly related to the early proposals of European and Japanese standardization organizations. For example, the chip rate was originally set to 4. 096 Mcps in a wide-band CDMA channel. I have kept that number in the book in most of the examples although it has been later changed to 3. 84 Mcps. I hope that the readers will accept that and the possible other incompabilities to the latest specifications. At least in the research phase the changes even in the most essential requirements are definitely not a rare incident and IC designers should be able to react and modify their designs as soon as they can.
Continuous-Time Sigma-Delta Modulation for A/D Conversion in Radio Receivers describes the design and theory of continuous-time sigma-delta modulators for analog-to-digital conversion in radio receivers. The book'...
ISBN:
(纸本)0792374924;9780792374923;9780306480041
Continuous-Time Sigma-Delta Modulation for A/D Conversion in Radio Receivers describes the design and theory of continuous-time sigma-delta modulators for analog-to-digital conversion in radio receivers. The book's main focus is on dynamic range, linearity and power efficiency aspects of sigma-delta modulators, which are very important requirements for use in battery operated receivers like GSM phones. An important part of the book deals with the image rejection performance of quadrature sigma-delta modulators. It is shown that techniques like dynamic-element-matching and integration of a mixer with the sigma-delta modulator greatly enhance the performance and functionality. In addition, the authors provide the reader with a theoretical overview of continuous-time sigma-delta modulation, including non-ideal effects, stability issues and different filter designs. The book's concluding chapters present chip realizations showing practical implementations of low-power and high-performance sigma-delta modulators for GSM and AM/FM radio applications.
Design and Analysis of High Efficiency Line Drivers for xDSL covers the most important building block of an xDSL (ADSL, VDSL, ...) system: the line driver. Traditional Class AB line drivers consume more than 70% of th...
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ISBN:
(数字)9781402025181
ISBN:
(纸本)1402077270;1402025181
Design and Analysis of High Efficiency Line Drivers for xDSL covers the most important building block of an xDSL (ADSL, VDSL, ...) system: the line driver. Traditional Class AB line drivers consume more than 70% of the total power budget of state-of-the-art ADSL modems. This book describes the main difficulties in designing line drivers for xDSL. The most important specifications are elaborated staring from the main properties of the channel and the signal properties. The traditional (class AB), state-of-the-art (class G) and future technologies (class K) are discussed. The main part of Design and Analysis of High Efficiency Line Drivers for xDSL describes the design of a novel architecture: the Self-Oscillating Power Amplifier or SOPA. This architecture uses a non-linear, asynchronous modulation scheme that enables highly efficient, highly linear transmission. The concept has been proven by two implementations in a digital CMOS technology: a G-Lite compliant line driver with 61% efficiency and a full ADSL-VDSL downstream compliant power amplifier with 47% power efficiency. The proposed architecture is fully analysed and complete design plans including CMOS scaling laws and software tools to facilitate the design of these types of amplifiers are extensively described. Since the analysis of a SOPA amplifier involves advanced non-linear system design techniques, Design and Analysis of High Efficiency Line Drivers for xDSL presents extensively advanced non-linear analysis techniques which not only aid the design of high efficiency line drivers but are also applicable in other domains of analog system design. Therefore Design and Analysis of High Efficiency Line Drivers for xDSL can be read not only as an exhaustive tutorial on the basic properties and limitations of an xDSL line driver, but also as a tutorial on advanced non-linear system design and a design manual of a highly efficient switching power amplifier.
Appendices 133 A Mathematical Results 133 A.1 Singularities of the Displacement Error Covariance Matrix 133 A.2 A Class of Matrices and their Eigenvalues 134 A.3 Inverse of the Power Spectral Density Matrix 134 A.4 Po...
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ISBN:
(数字)9781402077654
ISBN:
(纸本)9781402077593;9781441954329
Appendices 133 A Mathematical Results 133 A.1 Singularities of the Displacement Error Covariance Matrix 133 A.2 A Class of Matrices and their Eigenvalues 134 A.3 Inverse of the Power Spectral Density Matrix 134 A.4 Power Spectral Density of a Frame 136 Glossary 137 References 141 Index 159 Preface This book aims to capture recent advances in motion compensation for - ficient video compression. It investigates linearly combined motion comp- sated signals and generalizes the well known superposition for bidirectional prediction in B-pictures. The number of superimposed signals and the sel- tion of reference pictures will be important aspects of the discussion. The application oriented part of the book employs this concept to the well known ITU-T Recommendation H.263 and continues with the improvements by superimposed motion-compensated signals for the emerging ITU-T R- ommendation H.264 and ISO/IEC MPEG-4 (Part 10). In addition, it discusses a new approach for wavelet-based video coding. This technology is currently investigated by MPEG to develop a new video compression standard for the mid-term future.
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