Wireless Location In Cdma Cellular Radio Systems

Author : James J. Caffery, Jr.
Publisher : Springer Science & Business Media
Page : 196 pages
File Size : 41,8 Mb
Release : 2006-01-02
Category : Technology & Engineering
ISBN : 9780306473296

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Wireless Location in CDMA Cellular Radio Systems by James J. Caffery, Jr. Pdf

With the increasing market penetration of cellular telephones, the number of E-911 calls placed by cellular telephones has grown cons- erably. This growth in E-911 calls led to a 1996 FCC ruling requiring that all cellular, PCS, and SMR licensees provide location information for the support of E-911 safety services. The provision of such location information is to be implemented in two phases. Phase I, whose deadline has already been passed, requires that wireless carriers relay the caller’s telephone number along with location of the cell site and/or sector se- ing the call, to a designated Public Safety Answering Point (PSAP). This information allows the PSAP to return the call if disconnected. Phase II, to be completed by October 1, 2001, is much more stringent and requires that the location of an E-911 caller be determined and reported with an rms location accuracy of 125 m in 67% of the cases. The applications of wireless location technology extend well beyond E-911 services. Location information can be used by cellular telephone operators themselves for more effective management of their radio - sources, so as to achieve greater spectral efficiencies. Resource m- agement algorithms such as hand-offs between cell sites, channel assi- ments, and others can all benefit from subscriber location information. Location information obtained from vehicular based cellular telephones can be used as an input to Intelligent Transportation Systems (ITS), and in particular traffic management and traveler information systems.

Author : Jr James J. Caffery
Publisher : Unknown
Page : 208 pages
File Size : 49,5 Mb
Release : 2014-01-15
Category : Electronic
ISBN : 1475784244

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Wireless Location in Cdma Cellular Radio Systems by Jr James J. Caffery Pdf

Author : D. M. Balston
Publisher : Artech House Mobile Communicat
Page : 418 pages
File Size : 41,7 Mb
Release : 1993
Category : Technology & Engineering
ISBN : UCAL:B3904858

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Cellular Radio Systems by D. M. Balston Pdf

Understand the status of all the major cellular radio systems worldwide, explore the change from analog to digital, and evaluate the differences between the new digital systems. This comprehensive source brings together the technical and commercial issues associated with all the major analog and emerging digital systems.

Author : Savo G. Glisic,Pentti A. Leppänen
Publisher : Springer Science & Business Media
Page : 535 pages
File Size : 48,9 Mb
Release : 2013-03-14
Category : Technology & Engineering
ISBN : 9781475726046

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Wireless Communications by Savo G. Glisic,Pentti A. Leppänen Pdf

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 : Jack M. Holtzman,David J. Goodman
Publisher : Springer Science & Business Media
Page : 288 pages
File Size : 45,8 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461527169

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Wireless and Mobile Communications by Jack M. Holtzman,David J. Goodman Pdf

In October 1993, the Rutgers University Wireless Infonnation Network Laboratory hosted the fourth WINLAB Workshop on Third Generation Wireless Infonnation Networks. These events bring together a select group of experts interested in the long tenn future of Personal Communications, Mobile Computing, and other services supported by wireless telecommunications technology. This is a fast moving field and we already see, in present practice, realizations of visions articulated in the earlier Workshops. In particular, the second generation systems that absorbed the attention of the first WINLAB Workshop, are now commercial products. It is an interesting reflection on the state of knowledge of wireless communications that the debates about the relative technical merits of these systems have not yet been resolved. Meanwhile, in the light of United States Government announcements in September 1993 the business and technical communities must confront this year a new generation of Personal Communications Services. Here we have applications in search of the best technologies rather than the reverse. This is a rare situation in the infonnation business. Today's advanced planning and forward looking studies will prevent technology shortages and uncertainties at the end of this decade. By then, market size and public expectations will surpass the capabilities of the systems of the mid-1990's. Third Generation Wireless Infonnation Networks will place greater burdens on technology than their predecessors by offering a wider range of services and a higher degree of service integration.

Author : Martin J. Feuerstein,Theodore S. Rappaport
Publisher : Springer Science & Business Media
Page : 328 pages
File Size : 52,5 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461531623

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Wireless Personal Communications by Martin J. Feuerstein,Theodore S. Rappaport Pdf

In this book, the state-of-the-art and future vision of wireless communications is presented in the form of a number of new services. Wireless personal communications is clearly a different service than today's cellular radio or cordless telephone, but there is an evolutionary connection between the three services. This book addresses questions about what features of personal communication services (PCS) will be met by existing or enhanced digital cellular radio technology. The regulatory and standards aspects of wireless communications are currently in a crucial stage of their formulation. A section of the book is devoted to the opinions of representatives from regulatory agencies and standards organizations on the future of this critical area. One of the most intriguing questions about the future of wireless communications has to do with the choice of multiple access technique. The trade offs between time division multiple access (TDMA) and code division multiple access (CDMA) have been the topic of many a heated discussion amongst members of the wireless community. This book presents a thorough discussion of a number of the topics which are instrumental in making a fair comparison of TDMA and CDMA; these topics include: analytical performance evaluation techniques, capacity studies, equalization requirements, and shared spectrum comparisons. Many of the technologies associated with wireless personal communications are reaching the design stages. This book presents a number of alternatives for designs of both base stations and user terminals. Some of the key questions of equalization, control channel requirements, multi-path diversity and channel allocation strategies have been addressed. Invariably, system designs and performance are tied to the characteristics of the radio channel. This book introduces several novel techniques for predicting propagation and system performance in a variety of indoor and outdoor environments. These techniques include analytical as well as computer simulation algorithms for predicting signal strenghts and other channel parameters based on the local topographical features. This book serves as an excellent reference source and may be used as a text for advanced courses on wireless communications, cellular radio, or digital mobile radio.

Author : Joseph Shapira,Samuel Miller
Publisher : Springer Science & Business Media
Page : 439 pages
File Size : 43,5 Mb
Release : 2007-12-14
Category : Technology & Engineering
ISBN : 9780387490649

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CDMA Radio with Repeaters by Joseph Shapira,Samuel Miller Pdf

The book addresses the role of repeaters in the CDMA network, their interaction with the network and the needed integrative design and optimization of the repeater-embedded network. The approach of the book is to develop functional comprehension of the complex radio network, and affinity to the factors dominating the Radio Resource Utilization. Simple models are developed, and field-measured case studies complement the analysis.

Author : William C. Y. Lee
Publisher : McGraw Hill Professional
Page : 335 pages
File Size : 44,8 Mb
Release : 2000-11-23
Category : Technology & Engineering
ISBN : 9780071378574

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Lee's Essentials of Wirelesss Communications by William C. Y. Lee Pdf

ON-THE-MONEY GUIDE TO WIRELESS If you have to navigate the dangerous waters of wireless, do it with a tech-savvy, predictive manual at your side. That’s Lee's Essentials of Wireless Communications, written by the top-selling author in telecom, William C.Y. Lee. Smart wireless choices are not always obvious; a good deal of conventional wisdom is wrong. This expert guide helps you understand and compare CDM, SSB, CT-2, GSM, TDMA, IDEN (MIRS), LEO-Globalstar v. Iridium, IMT-2000, PCS, Wireless Local Loop (WLL), Wideband v. Narrowband, Analog Cellular, Digital Cellular, Radio Capacity, AMPS, ESS, Propagation System Strength Prediction, CDPD, UPR, and Two-Way Paging. Here’s everything you need for making wireless decisions that work today (and will still work tomorrow) -- from insider data on coming user demands to the tools for writing glitch-free, foresighted technical specs.

Author : Anonim
Publisher : Artech House
Page : 648 pages
File Size : 46,5 Mb
Release : 2002
Category : Technology
ISBN : 0890065756

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Emerging Public Safety Wireless Communication Systems by Anonim Pdf

With the increasing need for more effective and efficient responses to man-made and natural public safety threats, the necessity for improved private mobile and commercial wireless digital communication systems has become apparent. This one-of-a-kind resource describes today's public safety communication requirements and radio systems from a technical perspective, and shows you how communication systems are evolving to meet the growing demands of multimedia wireless applications.

Author : Hsiao-Hwa Chen,Mohsen Guizani
Publisher : John Wiley & Sons
Page : 512 pages
File Size : 43,6 Mb
Release : 2006-05-01
Category : Technology & Engineering
ISBN : 9780470024355

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Next Generation Wireless Systems and Networks by Hsiao-Hwa Chen,Mohsen Guizani Pdf

Next Generation Wireless Systems and Networks offers an expert view of cutting edge Beyond 3rd Generation (B3G) wireless applications. This self-contained reference combines the basics of wireless communications, such as 3G wireless standards, spread spectrum and CDMA systems, with a more advanced level research-oriented approach to B3G communications, eliminating the need to refer to other material. This book will provide readers with the most up-to-date technological developments in wireless communication systems/networks and introduces the major 3G standards, such as W-CDMA, CDMA2000 and TD-SCDMA. It also includes a focus on cognitive radio technology and 3GPP E-UTRA technology; areas which have not been well covered elsewhere. Covers many hot topics in the area of next generation wireless from the authors’ own research, including: Bluetooth, all-IP wireless networking, power-efficient and bandwidth-efficient air-link technologies, and multi-user signal processing in B3G wireless Clear, step-by-step progression throughout the book will provide the reader with a thorough grounding in the basic topics before moving on to more advanced material Addresses various important topics on wireless communication systems and networks that have emerged only very recently, such as Super-3G technology, 4G wireless, UWB, OFDMA and MIMO Includes a wealth of explanatory tables and illustrations This essential reference will prove invaluable to senior undergraduate and postgraduate students, academics and researchers. It will also be of interest to telecommunications engineers wishing to further their knowledge in this field.

Author : Kaveh Pahlavan,Allen H. Levesque
Publisher : John Wiley & Sons
Page : 742 pages
File Size : 49,8 Mb
Release : 2005-11-07
Category : Technology & Engineering
ISBN : 9780471738633

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Wireless Information Networks by Kaveh Pahlavan,Allen H. Levesque Pdf

Towards location aware mobile ad hoc sensors A Systems Engineering Approach to Wireless Information Networks The Second Edition of this internationally respected textbook brings readers fully up to date with the myriad of developments in wireless communications. When first published in 1995, wireless communications was synonymous with cellular telephones. Now wireless information networks are the most important technology in all branches of telecommunications. Readers can learn about the latest applications in such areas as ad hoc sensor networks, home networking, and wireless positioning. Wireless Information Networks takes a systems engineering approach: technical topics are presented in the context of how they fit into the ongoing development of new systems and services, as well as the recent developments in national and international spectrum allocations and standards. The authors have organized the myriad of current and emerging wireless technologies into logical categories: * Introduction to Wireless Networks presents an up-to-the-moment discussion of the evolution of the cellular industry from analog cellular technology to 2G, 3G, and 4G, as well as the emergence of WLAN and WPAN as broadband ad hoc networks * Characteristics of Radio Propagation includes new coverage of channel modeling for space-time, MIMO, and UWB communications and wireless geolocation networks * Modem Design offers new descriptions of space-time coding, MIMO antenna systems, UWB communications, and multi-user detection and interference cancellation techniques used in CDMA networks * Network Access and System Aspects incorporates new chapters on UWB systems and RF geolocations, with a thorough revision of wireless access techniques and wireless systems and standards Exercises that focus on real-world problems are provided at the end of each chapter. The mix of assignments, which includes computer projects and questionnaires in addition to traditional problem sets, helps readers focus on key issues and develop the skills they need to solve actual engineering problems. Extensive references are provided for those readers who would like to explore particular topics in greater depth. With its emphasis on knowledge-building to solve problems, this is an excellent graduate-level textbook. Like the previous edition, this latest edition will also be a standard reference for the telecommunications industry.

Author : Kamiar Radnosrati
Publisher : Linköping University Electronic Press
Page : 102 pages
File Size : 50,9 Mb
Release : 2018-08-29
Category : Electronic
ISBN : 9789176852699

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On Timing-Based Localization in Cellular Radio Networks by Kamiar Radnosrati Pdf

The possibilities for positioning in cellular networks has increased over time, pushed by increased needs for location based products and services for a variety of purposes. It all started with rough position estimates based on timing measurements and sector information available in the global system for mobile communication (gsm), and today there is an increased standardization effort to provide more position relevant measurements in cellular communication systems to improve on localization accuracy and availability. A first purpose of this thesis is to survey recent efforts in the area and their potential for localization. The rest of the thesis then investigates three particular aspects, where the focus is on timing measurements. How can these be combined in the best way in long term evolution (lte), what is the potential for the new narrow-band communication links for localization, and can the timing measurement error be more accurately modeled? The first contribution concerns a narrow-band standard in lte intended for internet of things (iot) devices. This lte standard includes a special position reference signal sent synchronized by all base stations (bs) to all iot devices. Each device can then compute several pair-wise time differences that corresponds to hyperbolic functions. Using multilateration methods the intersection of a set of such hyperbolas can be computed. An extensive performance study using a professional simulation environment with realistic user models is presented, indicating that a decent position accuracy can be achieved despite the narrow bandwidth of the channel. The second contribution is a study of how downlink measurements in lte can be combined. Time of flight (tof) to the serving bs and time difference of arrival (tdoa) to the neighboring bs are used as measurements. From a geometrical perspective, the position estimation problem involves computing the intersection of a circle and hyperbolas, all with uncertain radii. We propose a fusion framework for both snapshot estimation and filtering, and evaluate with both simulated and experimental field test data. The results indicate that the position accuracy is better than 40 meters 95% of the time. A third study in the thesis analyzes the statistical distribution of timing measurement errors in lte systems. Three different machine learning methods are applied to the experimental data to fit Gaussian mixture distributions to the observed measurement errors. Since current positioning algorithms are mostly based on Gaussian distribution models, knowledge of a good model for the measurement errors can be used to improve the accuracy and robustness of the algorithms. The obtained results indicate that a single Gaussian distribution is not adequate to model the real toa measurement errors. One possible future study is to further develop standard algorithms with these models.

Author : Mohamed Ibnkahla
Publisher : CRC Press
Page : 872 pages
File Size : 49,7 Mb
Release : 2004-08-16
Category : Technology & Engineering
ISBN : 9780203496510

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Signal Processing for Mobile Communications Handbook by Mohamed Ibnkahla Pdf

In recent years, a wealth of research has emerged addressing various aspects of mobile communications signal processing. New applications and services are continually arising, and future mobile communications offer new opportunities and exciting challenges for signal processing. The Signal Processing for Mobile Communications Handbook provi

Author : Theodore S. Rappaport
Publisher : Institute of Electrical & Electronics Engineers(IEEE)
Page : 532 pages
File Size : 43,9 Mb
Release : 1995
Category : Technology & Engineering
ISBN : MINN:31951D024867118

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Cellular Radio and Personal Communications by Theodore S. Rappaport Pdf

This collection of 40 articles will be invaluable to students, practicing engineers, and researchers. Leaders in the field give key information on fundamental system design, speech coding, cellular networking, modulation techniques, and standards in some of the most useful papers available.

Author : Henrik Schulze,Christian Lueders
Publisher : John Wiley & Sons
Page : 420 pages
File Size : 55,6 Mb
Release : 2005-10-31
Category : Technology & Engineering
ISBN : 9780470017395

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Theory and Applications of OFDM and CDMA by Henrik Schulze,Christian Lueders Pdf

Theory and Applications of OFDM and CDMA is an ideal foundation textbook for those seeking a sound knowledge of this fast-developing field of wideband communications. The advanced transmission techniques of OFDM, applied in wireless LANs and in digital and video broadcasting, and CDMA, the foundation of 3G mobile communications, have been part of almost every communication system that has been designed in recent years, with both offering a high degree of flexibility in adjusting the system to the requirements of the application and to the impairments caused by the transmission channel. Starting from the basics of digital transmission theory, the reader gains a comprehensive overview of the underlying ideas of these techniques and their strengths and weaknesses under various conditions. In this context, the specific requirements of the mobile radio channel and their relevance for the design of digital transmission systems are discussed and related to the items of channel coding and modulation. Clear explanation of the basics of digital communications, mobile radio channels, coding and modulation, OFDM as a multicarrier system and CDMA as an application of spread spectrum techniques Discusses the most important mobile radio and digital broadcasting systems that use OFDM and CDMA, and explains in detail the underlying ideas for the choice of system parameters Progresses from the fundamentals of wideband communication through to modern applications Includes a Companion Website featuring a solutions manual, electronic versions of the figures and other useful resources This volume will be an invaluable resource to advanced undergraduate students and first/second year postgraduates of electrical and engineering and telecommunications. It will also appeal to practising engineers, researchers and those in academia who wish to expand their knowledge on modern aspects of digital communications and systems in a mobile radio environment.