Wideband Tdd
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| Author | : Prabhakar Chitrapu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 286 |
| Release | : 2005-10-31 |
| Genre | : Technology & Engineering |
| ISBN | : 047086110X |
3rd generation radio systems will be increasingly developed, deployed and operated in the years to come. TDD is one of two main approaches to implementing these 3G systems, so that there will be an increasing need for the engineering community to learn quickly and comprehensively about the TDD technology. As 3G systems become popular, the topics will no doubt be introduced to academic curricula and will also provide a basis for future research. This book provides comprehensive coverage of TDD. It is essentially a Radio Access Network technology and the book embraces the structure of the radio interface as well as the user equipment and network equipment. In addition, Wideband TDD also covers the connection of the TDD Radio Access Network to the 3G Core Network and public switched networks (PSTN) as well as public and private packet networks (Internet and Intranet). Services, applications and performance are also addressed. Finally, TDD is compared with other radio access technologies, namely FDD, TD-SCDMA and WLAN. TD-SCDMA is the Narrowband version of TDD in 3G, and WLAN standards address wireless computer communications. Although there are a number of books published on 3G and UMTS, most of the focus of these books has been on FDD component of 3G. Wideband TDD: Describes all aspects of TDD in a single comprehensive manner Addresses TDD technology, TDD systems and the TDD market place Discusses deployment scenarios and Radio Resource Management for TDD Provides a comparison of TDD with other radio access technologies, namely FDD, TD-SCDMA and wireless LANs This will prove an essential addition to the bookshelf of professional communication and software engineers, development engineers, technical marketing professionals, researchers in industry, wireless equipment vendors such as Siemens, Nokia and InterDigital, operators and service providers. It will also provide a comprehensive overview of TDD for postgraduates who are taking advanced courses in Mobile Wireless communications.
| Author | : Harri Holma |
| Publisher | : John Wiley & Sons |
| Total Pages | : 530 |
| Release | : 2020-02-25 |
| Genre | : Technology & Engineering |
| ISBN | : 1119236312 |
A comprehensive guide to 5G technology, applications and potential for the future 5G brings new technology solutions to the 5G mobile networks including new spectrum options, new antenna structures, new physical layer and protocols designs and new network architectures. 5G Technology: 3GPP New Radio is a comprehensive resource that offers explanations of 5G specifications, performance evaluations, aspects of device design, practical deployment considerations and illustrative examples from field experiences. With contributions from a panel of international experts on the topic, the book presents the main new technology components in 5G and describes the physical layer, radio protocols and network performance. The authors review the deployment aspects such as site density and transport network and explore the 5G performance aspects including data rates and coverage and latency. The book also contains illustrative examples of practical field measurement. In addition, the book includes the most recent developments in 4G LTE evolution and offers an outlook for the future of the evolution of 5G. This important book: Offers an introduction to 5G technology and its applications Contains contributions from international experts on the topic Reviews the main technology components in 5G Includes information on the optimisation of the Internet of things Presents illustrative examples of practical field measurements Written for students and scientists interested in 5G technology, 5G Technology: 3GPP New Radio provides a clear understanding of the underlying 5G technology that promotes the opportunity to take full benefit of new capabilities.
| Author | : Savo G. Glisic |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 535 |
| Release | : 2013-03-14 |
| Genre | : Technology & Engineering |
| ISBN | : 147572604X |
In Time Division Multiple Access (TDMA), within a given time frame a particular user is allowed to transmit within a given time slot. This technique is used in most of the second-generation digital mobile communication systems. In Europe the system is known as GSM, in USA as DAMPS and in Japan as MPT. In Code Division Multiple Access (CDMA) every user is using a distinct code so that it can occupy the same frequency bandwidth at the same time with other users and still can be separated on the basis of low correlation between the codes. These systems like IS-95 in the USA are also developed and standardized within the second generation of the mobile communication systems. CDMA systems within a cellular network can provide higher capacity and for this reason they become more and more attractive. At this moment it seems that both TDMA and CDMA remain viable candidates for application in future systems. Wireless Communications: TDMA versus CDMA provides enough information for correct understanding of the arguments in favour of one or other multiple access technique. The final decision about which of the two techniques should be employed will depend not only on technical arguments but also on the amount of new investments needed and compatibility with previous systems and their infrastructures. Wireless Communications: TDMA versus CDMA comprises a collection of specially written contributions from the most prominent specialists in wireless communications in the world today and presents the major, up to date, issues in this field. The material is grouped into four chapters: Communication theory, covering coding and modulation, Wireless communications, Antenna & Propagation and Advanced Systems & Technology. The book describes clearly the issues and presents the information in such a way that informed decisions about third generation wireless systems can be taken. It is essential reading for all researchers, engineers and managers working in the field of Wireless Communications.
| Author | : Alex Brand |
| Publisher | : John Wiley & Sons |
| Total Pages | : 482 |
| Release | : 2002-04-12 |
| Genre | : Technology & Engineering |
| ISBN | : 9780471498773 |
In leicht verständlichem Stil erläutern die Autoren dieses Buches Anforderungen an Multiple-Access-Protokolle für den Mobilfunk. Zu Beginn werden zellulare Kommunikationssysteme der 2. und 3. Generation eingeführt. Ausführlich beschrieben werden dann MA-Protokolle für paketorientierte zellulare Systeme. Ein großer Teil der vorgestellten Resultate stammt aus eigenen Forschungsarbeiten der Autoren, u.a. zur Verbesserung der Protokolle und zur Modellierung der physikalischen OSI-Schicht.
| Author | : Theodore S. Rappaport |
| Publisher | : Cambridge University Press |
| Total Pages | : 733 |
| Release | : 2024-02-08 |
| Genre | : Technology & Engineering |
| ISBN | : 1009489836 |
Reissued by Cambridge University Press, this definitive textbook provides unrivaled coverage of wireless communication fundamentals.
| Author | : Nathan Blaunstein |
| Publisher | : John Wiley & Sons |
| Total Pages | : 40 |
| Release | : 2014-04-03 |
| Genre | : Technology & Engineering |
| ISBN | : 1118816722 |
Radio Propagation and Adaptive Antennas for Wireless Communication Networks, 2nd Edition, presents a comprehensive overview of wireless communication system design, including the latest updates to considerations of over-the-terrain, atmospheric, and ionospheric communication channels. New features include the latest experimentally-verified stochastic approach, based on several multi-parametric models; all-new chapters on wireless network fundamentals, advanced technologies, and current and modern multiple access networks; and helpful problem sets at the conclusion of each chapter to enhance clarity. The volume’s emphasis remains on a thorough examination of the role of obstructions on the corresponding propagation phenomena that influence the transmission of radio signals through line-of-sight (LOS) and non-line-of-sight (NLOS) propagation conditions along the radio path between the transmitter and the receiver antennas—and how adaptive antennas, used at the link terminals, can be used to minimize the deleterious effects of such obstructions. With its focus on 3G, 4G, MIMO, and the latest wireless technologies, Radio Propagation and Adaptive Antennas for Wireless Communication Networks represents an invaluable resource to topics critical to the design of contemporary wireless communication systems. Explores novel wireless networks beyond 3G, and advanced 4G technologies, such as MIMO, via propagation phenomena and the fundamentals of adapted antenna usage. Explains how adaptive antennas can improve GoS and QoS for any wireless channel, with specific examples and applications in land, aircraft and satellite communications. Introduces new stochastic approach based on several multi-parametric models describing various terrestrial scenarios, which have been experimentally verified in different environmental conditions New chapters on fundamentals of wireless networks, cellular and non-cellular, multiple access networks, new applications of adaptive antennas for positioning, and localization of subscribers Includes the addition of problem sets at the end of chapters describing fundamental aspects of wireless communication and antennas.
| Author | : Harri Holma |
| Publisher | : John Wiley & Sons |
| Total Pages | : 268 |
| Release | : 2007-01-11 |
| Genre | : Technology & Engineering |
| ISBN | : 0470032626 |
From the editors of the highly successful WCDMA for UMTS, this new book provides a comprehensive and up-to-date reference to High Speed Packet Access (HSPA) technologies for WCDMA. The editors cover both HSDPA and HSUPA, including an in-depth description and explanation of 3GPP standards, and expected performance based on simulations and first measurements. The text also discusses the impact of HSDPA and HSUPA on network dimensioning, covers applications and end-to-end performance in detail, and includes a section on radio frequency requirements and terminal design considerations. The most comprehensive and advanced guide to the HSDPA (High Speed Downlink Packet Access) and HSUPA (High Speed Uplink Packet Access) technologies and standardisation, HSDPA/HSUPA for UMTS: Analyses the impact of HSDPA/HSUPA on network dimensioning, discussing co-existence with R99 (Release 99) and GPRS/EDGE (General Packet Radio Services/ Enhanced Data GSM Environment) Contains a section on applications and end-to-end (e2e) performance Includes a chapter on radio frequency (RF) requirements and terminal design considerations, covering different RF bands, multi-band HSDPA and multi-mode HSDPA+EDGE challenges, power consumption Provides numerous illustrations of 3GPP (Third Generation Partnership Project) standards and performance This title provides excellent coverage of the area for system, element and chip designers, network planners, technical mangers with vendors, operators and application developers. It is also ideal for postgraduates and researchers in related areas.
| Author | : Balamurali |
| Publisher | : Balamurali |
| Total Pages | : 190 |
| Release | : |
| Genre | : |
| ISBN | : |
Contents 1 Introductory Concepts 1 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Evolution of Mobile Radio Communications . . . . . . . . . . . . . . 1 1.3 Present Day Mobile Communication . . . . . . . . . . . . . . . . . . 3 1.4 Fundamental Techniques . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4.1 Radio Transmission Techniques . . . . . . . . . . . . . . . . . 5 1.5 How a Mobile Call is Actually Made? . . . . . . . . . . . . . . . . . 7 1.5.1 Cellular Concept . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.5.2 Operational Channels . . . . . . . . . . . . . . . . . . . . . . 8 1.5.3 Making a Call . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.6 Future Trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.7 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2 Modern Wireless Communication Systems 11 2.1 1G: First Generation Networks . . . . . . . . . . . . . . . . . . . . . 11 2.2 2G: Second Generation Networks . . . . . . . . . . . . . . . . . . . . 11 2.2.1 TDMA/FDD Standards . . . . . . . . . . . . . . . . . . . . . 12 2.2.2 CDMA/FDD Standard . . . . . . . . . . . . . . . . . . . . . 12 2.2.3 2.5G Mobile Networks . . . . . . . . . . . . . . . . . . . . . . 12 2.3 3G: Third Generation Networks . . . . . . . . . . . . . . . . . . . . . 13 2.3.1 3G Standards and Access Technologies . . . . . . . . . . . . . 14 2.3.2 3G W-CDMA (UMTS) . . . . . . . . . . . . . . . . . . . . . 14 2.3.3 3G CDMA2000 . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.3.4 3G TD-SCDMA . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.4 Wireless Transmission Protocols . . . . . . . . . . . . . . . . . . . . 19 2.4.1 Wireless Local Loop (WLL) and LMDS . . . . . . . . . . . . 19 2.4.2 Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.4.3 Wireless Local Area Networks (W-LAN) . . . . . . . . . . . . 20 2.4.4 WiMax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.4.5 Zigbee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.4.6 Wibree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.5 Conclusion: Beyond 3G Networks . . . . . . . . . . . . . . . . . . . . 22 2.6 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3 The Cellular Engineering Fundamentals 23 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.2 What is a Cell? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.3 Frequency Reuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.4 Channel Assignment Strategies . . . . . . . . . . . . . . . . . . . . . 27 3.4.1 Fixed Channel Assignment (FCA) . . . . . . . . . . . . . . . 27 3.4.2 Dynamic Channel Assignment (DCA) . . . . . . . . . . . . . 27 3.5 Hando Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.5.1 Factors In uencing Hando s . . . . . . . . . . . . . . . . . . 29 3.5.2 Hando s In Di erent Generations . . . . . . . . . . . . . . . 31 3.5.3 Hando Priority . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.5.4 A Few Practical Problems in Hando Scenario . . . . . . . . 33 3.6 Interference & System Capacity . . . . . . . . . . . . . . . . . . . . . 34 3.6.1 Co-channel interference (CCI). . . . . . . . . . . . . . . . . . 34 3.6.2 Adjacent Channel Interference (ACI) . . . . . . . . . . . . . . 37 3.7 Enhancing Capacity And Cell Coverage . . . . . . . . . . . . . . . . 38 3.7.1 The Key Trade-o . . . . . . . . . . . . . . . . . . . . . . . . 38 3.7.2 Cell-Splitting . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.7.3 Sectoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 3.7.4 Microcell Zone Concept . . . . . . . . . . . . . . . . . . . . . 46 3.8 Trunked Radio System . . . . . . . . . . . . . . . . . . . . . . . . . . 47 3.9 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4 Free Space Radio Wave Propagation 54 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 4.2 Free Space Propagation Model . . . . . . . . . . . . . . . . . . . . . 55 4.3 Basic Methods of Propagation . . . . . . . . . . . . . . . . . . . . . . 57 4.3.1 Re ection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 4.3.2 Di raction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 4.3.3 Scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 4.4 Two Ray Re ection Model . . . . . . . . . . . . . . . . . . . . . . . . 59 4.5 Di raction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 4.5.1 Knife-Edge Di raction Geometry . . . . . . . . . . . . . . . . 64 4.5.2 Fresnel Zones: the Concept of Di raction Loss . . . . . . . . 66 4.5.3 Knife-edge di raction model . . . . . . . . . . . . . . . . . . . 68 4.6 Link Budget Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . 69 4.6.1 Log-distance Path Loss Model . . . . . . . . . . . . . . . . . 69 4.6.2 Log Normal Shadowing . . . . . . . . . . . . . . . . . . . . . 70 4.7 Outdoor Propagation Models . . . . . . . . . . . . . . . . . . . . . . 70 4.7.1 Okumura Model . . . . . . . . . . . . . . . . . . . . . . . . . 70 4.7.2 Hata Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 4.8 Indoor Propagation Models . . . . . . . . . . . . . . . . . . . . . . . 72 4.8.1 Partition Losses Inside a Floor (Intra- oor) . . . . . . . . . . 72 4.8.2 Partition Losses Between Floors (Inter- oor) . . . . . . . . . 73 4.8.3 Log-distance Path Loss Model . . . . . . . . . . . . . . . . . 73 4.9 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.10 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 5 Multipath Wave Propagation and Fading 75 5.1 Multipath Propagation . . . . . . . . . . . . . . . . . . . . . . . . . . 75 5.2 Multipath & Small-Scale Fading . . . . . . . . . . . . . . . . . . . . 75 5.2.1 Fading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 5.2.2 Multipath Fading E ects . . . . . . . . . . . . . . . . . . . . 76 5.2.3 Factors In uencing Fading . . . . . . . . . . . . . . . . . . . . 76 5.3 Types of Small-Scale Fading . . . . . . . . . . . . . . . . . . . . . . . 77 5.3.1 Fading E ects due to Multipath Time Delay Spread . . . . . 77 5.3.2 Fading E ects due to Doppler Spread . . . . . . . . . . . . . 78 5.3.3 Doppler Shift . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 5.3.4 Impulse Response Model of a Multipath Channel . . . . . . . 80 5.3.5 Relation Between Bandwidth and Received Power . . . . . . 82 5.3.6 Linear Time Varying Channels (LTV) . . . . . . . . . . . . . 84 5.3.7 Small-Scale Multipath Measurements . . . . . . . . . . . . . . 85 5.4 Multipath Channel Parameters . . . . . . . . . . . . . . . . . . . . . 87 5.4.1 Time Dispersion Parameters . . . . . . . . . . . . . . . . . . 87 5.4.2 Frequency Dispersion Parameters . . . . . . . . . . . . . . . . 89 5.5 Statistical models for multipath propagation . . . . . . . . . . . . . . 90 5.5.1 NLoS Propagation: Rayleigh Fading Model . . . . . . . . . . 91 5.5.2 LoS Propagation: Rician Fading Model . . . . . . . . . . . . 93 5.5.3 Generalized Model: Nakagami Distribution . . . . . . . . . . 94 5.5.4 Second Order Statistics . . . . . . . . . . . . . . . . . . . . . 95 5.6 Simulation of Rayleigh Fading Models . . . . . . . . . . . . . . . . . 96 5.6.1 Clarke's Model: without Doppler E ect . . . . . . . . . . . . 96 5.6.2 Clarke and Gans' Model: with Doppler E ect . . . . . . . . . 96 5.6.3 Rayleigh Simulator with Wide Range of Channel Conditions 97 5.6.4 Two-Ray Rayleigh Faded Model . . . . . . . . . . . . . . . . 97 5.6.5 Saleh and Valenzuela Indoor Statistical Model . . . . . . . . 98 5.6.6 SIRCIM/SMRCIM Indoor/Outdoor Statistical Models . . . . 98 5.7 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 5.8 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 6 Transmitter and Receiver Techniques 101 6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.2 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.2.1 Choice of Modulation Scheme . . . . . . . . . . . . . . . . . . 102 6.2.2 Advantages of Modulation . . . . . . . . . . . . . . . . . . . . 102 6.2.3 Linear and Non-linear Modulation Techniques . . . . . . . . . 103 6.2.4 Amplitude and Angle Modulation . . . . . . . . . . . . . . . 104 6.2.5 Analog and Digital Modulation Techniques . . . . . . . . . . 104 6.3 Signal Space Representation of Digitally Modulated Signals . . . . . 104 6.4 Complex Representation of Linear Modulated Signals and Band Pass Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 6.5 Linear Modulation Techniques . . . . . . . . . . . . . . . . . . . . . 106 6.5.1 Amplitude Modulation (DSBSC) . . . . . . . . . . . . . . . . 106 6.5.2 BPSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 6.5.3 QPSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 6.5.4 O set-QPSK . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 6.5.5 =4 DQPSK . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 6.6 Line Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 6.7 Pulse Shaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 6.7.1 Nyquist pulse shaping . . . . . . . . . . . . . . . . . . . . . . 112 6.7.2 Raised Cosine Roll-O Filtering . . . . . . . . . . . . . . . . 113 6.7.3 Realization of Pulse Shaping Filters . . . . . . . . . . . . . . 113 6.8 Nonlinear Modulation Techniques . . . . . . . . . . . . . . . . . . . . 114 6.8.1 Angle Modulation (FM and PM) . . . . . . . . . . . . . . . . 114 6.8.2 BFSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 6.9 GMSK Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 6.10 GMSK Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 6.11 Two Practical Issues of Concern . . . . . . . . . . . . . . . . . . . . 121 6.11.1 Inter Channel Interference . . . . . . . . . . . . . . . . . . . . 121 6.11.2 Power Ampli er Nonlinearity . . . . . . . . . . . . . . . . . . 122 6.12 Receiver performance in multipath channels . . . . . . . . . . . . . . 122 6.12.1 Bit Error Rate and Symbol Error Rate . . . . . . . . . . . . . 123 6.13 Example of a Multicarrier Modulation: OFDM . . . . . . . . . . . . 123 6.13.1 Orthogonality of Signals . . . . . . . . . . . . . . . . . . . . . 125 6.13.2 Mathematical Description of OFDM . . . . . . . . . . . . . . 125 6.14 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 6.15 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 7 Techniques to Mitigate Fading E ects 129 7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 7.2 Equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 7.2.1 A Mathematical Framework . . . . . . . . . . . . . . . . . . . 131 7.2.2 Zero Forcing Equalization . . . . . . . . . . . . . . . . . . . . 132 7.2.3 A Generic Adaptive Equalizer . . . . . . . . . . . . . . . . . . 132 7.2.4 Choice of Algorithms for Adaptive Equalization . . . . . . . . 134 7.3 Diversity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 7.3.1 Di erent Types of Diversity . . . . . . . . . . . . . . . . . . . 137 7.4 Channel Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 7.4.1 Shannon's Channel Capacity Theorem . . . . . . . . . . . . . 143 7.4.2 Block Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 7.4.3 Convolutional Codes . . . . . . . . . . . . . . . . . . . . . . . 152 7.4.4 Concatenated Codes . . . . . . . . . . . . . . . . . . . . . . . 155 7.5 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 7.6 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 8 Multiple Access Techniques 157 8.1 Multiple Access Techniques for Wireless Communication . . . . . . . 157 8.1.1 Narrowband Systems . . . . . . . . . . . . . . . . . . . . . . . 158 8.1.2 Wideband Systems . . . . . . . . . . . . . . . . . . . . . . . . 158 8.2 Frequency Division Multiple Access . . . . . . . . . . . . . . . . . . . 159 8.2.1 FDMA/FDD in AMPS . . . . . . . . . . . . . . . . . . . . . 160 8.2.2 FDMA/TDD in CT2 . . . . . . . . . . . . . . . . . . . . . . . 160 8.2.3 FDMA and Near-Far Problem . . . . . . . . . . . . . . . . . 160 8.3 Time Division Multiple Access . . . . . . . . . . . . . . . . . . . . . 161 8.3.1 TDMA/FDD in GSM . . . . . . . . . . . . . . . . . . . . . . 161 8.3.2 TDMA/TDD in DECT . . . . . . . . . . . . . . . . . . . . . 162 8.4 Spread Spectrum Multiple Access . . . . . . . . . . . . . . . . . . . . 163 8.4.1 Frequency Hopped Multiple Access (FHMA) . . . . . . . . . 163 8.4.2 Code Division Multiple Access . . . . . . . . . . . . . . . . . 163 8.4.3 CDMA and Self-interference Problem . . . . . . . . . . . . . 164 8.4.4 CDMA and Near-Far Problem . . . . . . . . . . . . . . . . . 165 8.4.5 Hybrid Spread Spectrum Techniques . . . . . . . . . . . . . . 165 8.5 Space Division Multiple Access . . . . . . . . . . . . . . . . . . . . . 166 8.6 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 8.7 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
| Author | : Anand Rishabh |
| Publisher | : S. Chand Publishing |
| Total Pages | : 424 |
| Release | : 2012 |
| Genre | : Technology & Engineering |
| ISBN | : 8121940559 |
Introduction To Wireless Communication System | Modern Wireless Communication System | Mobile Radio Propogation | Spread Spectrum Modulation Techniques | Equalization And Diversity Techniques | Speech Coding And Quantization Techniques Multiple Access Techniques For Wireless Communication | The Cellular Concept System Design Fundamentals | Wireless Networking | Wireless Systems And Standards | Satellite Communication | Modulation Techniques For Mobile Radio | Architecture And Applications Of Wirless Networks | Appendices | Model Question Papers
| Author | : Robert Lloyd-Evans |
| Publisher | : Artech House |
| Total Pages | : 354 |
| Release | : 2002 |
| Genre | : Computers |
| ISBN | : 9781580535656 |
QoS in Integrated 3G Networks offers you clear descriptions of the factors governing quality in integrated third generation mobile networks, dealing with issues arising from both fixed and mobile systems, and their protocols. Leading-edge technologies, including WCDMA, cdma2000, and GPRS are covered comprehensively and considerable attention is devoted to features of specific application types likely to be run over the integrated network. The book provides you with expert guidance in estimating response times across a network and identifying which part of a 3G network is responsible for any reported QoS (quality of service) problems. This unique, hands-on resource shows you the way different parts of an integrated 3G mobile network affect quality. It offers a better understanding of the trade-off between quality of service and the usable capacity of the network, the best applications to use for multimedia applications, and how to handle quality problems.
