| Wireless Digital Communications - Modulation and Spread Spectrum Applications (1995) |
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| Table of Contents 1. Introduction to Wireless, Cellular, Digital, PCS-Mobile Radio. Summary. Mobile Communications: Evolution and Fundamentals. International Mobile Satellite, Low Earth Orbit, and Medium Altitude Orbit Satellite Frequency Bands. Personal Communication Systems (PCS) Universal Digital PCS. Standards: The Importance of National and International Standardization. Mobile Personal Computers (PC) and Personal Communication Systems (PCS). U.S. and World Cellular Markets. 2. Speech Coding for Wireless Systems Applications. Introduction to Digital Signal Processing (DSP) Techniques in Wireless Telephone and Broadcast Systems. Speech Coding Techniques for Audio and Voice. American and European Speech Codes. 3. Radio Propagation and Cellular Engineering Concepts. Introduction. Fundamental Radio Propagation and System Concepts. Fundamentals of Antenna Gain. Propagation Characteristics. Models of Multipath-Faded Radio Signals. Instrumentation and Measurements for Laboratory and Field Tests. Delay-Spread Field Measurement Results. Industry Standards for Propagation Models. Problems. 4. Digital Modulation-Demodulation (MODEM) Techniques. Introduction. Baseband Transmission Systems. Modem Principles and Architectures. Interference. Definitions and Performance of Spectral and Power Efficiency. Performance in Complex Interference-Controlled Mobile Systems. Advantages of Coherent Demodulation over Noncoherent Systems. Advanced Modulation Methods. Adaptive Equalization for Frequency- Selective Faded and Delay-Spread Systems. Synchronization of Burst Demodulators: Carrier Recovery and Symbol Timing Recovery. Problems. 5. Coding: Error Correction and Detection. Error Control Requirements. Interleaving. Block Coding. Convolutional Coding. Price of Error Correction: Reduced Throughput? Word-Error Rate, False-Alarm Rate, and Probability of Bit Error. Repetition Transmission and Majority-Voting System: Concepts and Performance. Automatic Repeat Request. 6. Spread-Spectrum Systems. Introduction. Fundamental Concepts of Spread-Spectrum Systems. Pseudo-noise Sequences. Performance of Direct- Sequence Spread-Spectrum Systems. Code Division Multiple Access (CDMA): Direct-Sequence (DS) and Frequency-Hopped (FH) Spread-Spectrum Systems. Frequency-Hopping Spread-Spectrum Systems. Synchronization of Spread-Spectrum Systems. Spread- Spectrum Applications in Cellular, PCS, and Mobile Communications. Problems. 7. Diversity Techniques for Mobile-Wireless Radio Systems. Introduction. Concepts of Diversity Branch and Signal Paths. Combining and Switching Methods. Carrier-to-Noise and Carrier-to-Interference Ratio Performance Improvements. Average Pe Performance Improvement. Summary. Problems. 8. Personal Mobile Satellite Communications. Introduction. Integration of GEO, LEO, and MEO Satellite and Terrestrial Mobile Systems. Personal Satellite Communications Programs. 9. Cellular and Wireless Systems Engineering. Introduction. Access Methods: TDMA (TDD and FDMA); Spread-Spectrum Frequency-Hopping; Direct-Sequence CDMA and CSMA. Comparison of Linearly Amplified BPSK, DQPS and DQPSK and Nonlinearly Amplified (NLA) GMSK, GFSK, 4-FM, and FQPSK Radio Equipment (Coherent and Noncoherent). Radio Link Design of Digital Wireless Cellular Systems. Spectrum Utilization in Digital Wireless Mobile Systems. Capacity and Throughput (Message Delay) Study and Comparison of GMSK, GFSK, and FQPSK Modulated Wireless Systems. Time Division Multiple Access Wireless Cellular Systems. Code Division Multiple Access Spread-Spectrum Digital Cellular IS-95 System. Standards for Wireless Local Area Networks. Wireless Personal Communications. Problems. Appendices. Statistical Communication Theory: Terms, Definitions, and Concepts. Software Package of CREATE-1 (Disk Enclosed). Dr. Feher Associates Patented Filter, Digital Signal Processing, and Correlated Modulation/RF Amplification Means: GMSK, GFSK, FBPSK and FQPSK Implementations of Digcom, Inc. Licensed Technologies. Abbreviations and Acronyms. Bibliography. Index. Ingram Describing digital communications principles required for comprehension, analysis, design, advanced R&D and maintenance/operation of present and future generations of digital wireless, cellular and mobile systems, this book presents architectures, hardware and software designs and solutions to common problems. Includes market data and forecast of world-wide growth of wireless systems. The publisher, Prentice-Hall ECS Professional Featuring the latest coverage of Code Division Multiple Access (CDMA) and Time Division Multiple Access (TDMA) systems, this is the only book in the wireless digital communications field which contains an in-depth analysis and description of practical R&D, design, and implementation sections, with an emphasis on the newest generations of modulation and spread spectrum systems. Describes modern digital communications principles required for comprehension, analysis, design, advanced R&D, and maintenance/operation of present and future generations of digital wireless, cellular and mobile systems. Complete coverage of digital cellular communications, satellite mobile radio, personal communication systems and wireless LANs. From the Inside Flap You may be a self-motivated and ambitious engineer. Perhaps you are a student or professor. Regardless of your position or occupation, we have one goal in common: the desire or the need to be at the forefront of the fascinating field of wireless digital communications. Are you reading this preface to find out why you should read this book or what you will learn from it? How is this book unique? Should you use it as a reference text in your courses? Is it necessary to read complete sections, or is it effective to us e the book as a reference text? Should you use the CREATE-1 software diskette contained in this book? Please continue to read this preface and allow me to respond to the preceding questions. My goal is to cooperate with you in the learning process. I wish to share my product and system design experience and enthusiasm in order to improve our joint understanding of wireless communications systems. The following quotation summarizes one vision of the importance and tremendous potential of wireless computer and phone systems as: A new era of human communications where wireless technologies become information skyways, a new avenue to send ideas and masses of information to remote locations in ways most of us would never have imagined. Wireless hand-held computers and phones will deliver the world to our fingertips wherever we may be, with speed and flexibility. William Clinton President of the United States of America Users opinions, understanding, and learning of wireless communications applications, particularly those of future communications customers, are of utmost importance to all of us. The following quotation illustrates the opinion and understanding of a 12-year-old: Wireless Communications: Communications in our world is very important. We could not have as many things going on around this world as we do now. Police, for example, would have a much tougher job. They could not tell each other what is going on where and no dispatcher could tell them if there is a call. Communications makes it easier to build big buildings. They need to have it because then they could tell each other to do this or that. This world would be quite chaotic. There are two types of communications. Wired communications and wireless communications. Wireless communications includes examples such as hand held CB radio, or a hand held cellular phone. Wired communications are like house phones, or faxes. Today I am going to be talking about Wireless Communications Antoine-Kamilo Feher, Sixth-Grade Student, 1994 Pioneer Elementary School Report Davis, California The size of the annual cellular communications business in the United States has grown from $100 million to more than $30 billion in less than 10 years. Cellular, wireless-cable, and other telecommunications and broadcasting corporations are increasi ng the voice (telephony) capacity of their networks and are adding new data features so that customers with wireless modulation-demodulation devices (modems) in portable personal computers and workstations can access electronic mail and facsimile, wr itten, graphic, audio, and video messages. For the cellular industry, selection of the most appropriate access method is a challenging task. This task is focused on the choice between time division multiple access (TDMA) and spread-spectrum code divi sion multiple access (CDMA) architectures. Both of these access methods have the capability to increase the capacity of analog cellular systems by approximately 10 to 40 times. Already in 1995, more than five million cellular subscribers are using se cond-generation TDMA digital technology. Spread-spectrum systems have the promise of further increasing the capacity of TDMA-based cellular and wireless systems. Both of these architectures will be extensively used during the next decade. The ultimate wireless information-communication advances will have to achieve truly unlimited capabilities and services. New satellite communications projects, such as the multibillion dollar IRIDIUM project of Motorola, which uses 66 satellites, cou ld guarantee the "anytime, anywhere" promise; however, whether it could reach a broad consumer market at a reasonable price is questionable. The business fields affected by the wireless computer information and communications revolution are broad and challenging. To meet this challenge, managers, engineers, students, and professors will have to become very familiar with the technologies a nd system architectures described in this book. I do not know of another book of comparable scope and depth in the wireless digital communications field. Most modern digital communications techniques required for the comprehension, analysis, design, and maintenance of digital wireless systems are described in this book. An introductory overview of basic material is included. After the description of principles of operation and concepts we proceed with the study of modern techniques, architecture s, products, and standards. In-depth material on some of the most advanced digital modulation, spread-spectrum, and wireless radio engineering research, business developments, and worldwide applications is also included. I assume that, to understand this book, you have a reasonable background in the foundations of basic communications engineering and technology. Selected chapters from this book have been taught at the University of California, Davis, in undergraduate and graduate courses. Sections of this text have also been presented at numerous professional short courses around the world to practicing engineers, managers, and system operators. The enthusiastic feedback received from hundreds of participants of these courses and from readers of my previously published books motivated me to formalize my notes and write this text. I believe that university professors will find educational and intellectually challenging material for senior undergraduate and graduate level courses. If you are a practicing engineer and already have a generally broad knowledge of some of the topics covered in this volume, I hope that reading this text will motivate you to read the more advanced subjects. Even if you do not have the time, energy, or interest to study all of the derivations and mathematical and theoretical concepts, you could benefit from the more than 300 figures, graphs, tables, photographs, and original measurement results. Numerous comparisons of system specifications and standards of the 1990s should be of considerable value to the system architect and design engineer. Thus this volume could be used for your in-depth studies or as a professional reference. It is my intent to motivate you to be inventive in this fas cinating field. In my courses I devote considerable time and effort to help students develop inventive, cost- efficient solutions. In some cases in this text I felt that I needed to become provocative in order to really challenge you and to uncover and encourage your inventive mind. Although the principal objective of this text is to provide general knowledge transfer and technology transfer to you, I believe that the general educational material should be complemented by research achieveme nts. Research, particularly research and development from my university and industry- based teams, is reported extensively in this book. In several sections, combined modulation and nonlinearly amplified, power-efficient and spectrally efficient radio developments, implementations, and technology transfer and licensing activities for a broad family of patented GMSK, GFSK, FQPSK, FBPSK , and FQAM (Dr. Feher, Engineering Associates-Digcom, Inc., El Macero, California) wireless systems are described. These systems have a spectral efficiency advantage of more than 200% as compared with internationally standardized (GMSK) and Gaussian frequency shift keying (GFSK) systems, are compatible with GMSK systems, and have a radio frequency (or infrared) power efficiency advantage of more than 300% as compared with standardized /4-DQPSK and other conventional QPSK systems. Unique features of this book include its pragmatic, down-to-earth treatment of some of the most complex and advanced digital wireless communications concepts. Physical layer (PHY) wireless system designs, advanced baseband processing, filtering, mo dulation, radio frequency amplification, efficient radio architecture, demodulation, and synchronization subsystems are given a comprehensive treatment for the first time in a book. Most important, critical interaction among these subsystems and essential joint system and hardware design, optimization, implementation, and testing of components is thoroughly discussed. In-depth mathematical and analytical treatment of radio propagation, cellular interference, digital modem, error-control, spread-spectrum, and diversity wireless systems is presented for the advanced reader; however, the busy professional could skip the derivations and use the final performance charts and tables. For computer-aide From the Back Cover Featuring the latest coverage of CDMA and TDMA systems, this is the only book in the wireless digital communications field which contains an in-depth analysis and description of practical R&D, design, and implementation sections, with an emphasis on the newest generations of modulation and spread spectrum systems. Describes modern digital communications principles required for comprehension, analysis, design, advanced R&D, and maintenance/operation of present and future generations of digital wireless, cellular and mobile systems. Presents architectures, hardware and software designs, and solutions to common problems. Includes market data and forecasts of the world-wide growth of wireless systems. For engineers, telecommunications managers, computer scientists, product planners, technical and market consultants, and all those interested in wireless communications. |
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| Notes |
| System requirements for accompanying computer disk: DOS. Includes bibliographical references (p. 499-516) and index. |