Download or read book On the Capacity of a Cellular CDMA System Reverse Channel written by Petros Klitorakis and published by . This book was released on 2002-03 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the reverse channel model for a seven-cell cluster DS-CDMA cellular communications system operating in a slow-flat Nakagami fading and lognormal shadowing environment is developed. The aforementioned system uses imperfect power control to combat the near-far effect and the lognormal shadowing. Forward error correction is applied by using convolutional encoding and soft decision decoding. The probability of bit error is estimated by using a Gaussian approximation, sectoring antennas and a rake receiver at the base station in order to enhance the system's performance. The performance of the system is examined under several values of the standard deviation of lognormal shadowing and the power control error for various numbers of users and values of the Nakagami-m variable by using simulations. Finally, a barrage noise jammer will be introduced and its effect seen in the performance of the cellular communication system for a specific value of E(sub b)/N(sub o).
Download or read book Evaluation and Methods to Reduce Co Channel Interference on the Reverse Channel of a CDMA Cellular System written by Adem Durak and published by . This book was released on 1999-03-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing exploitation of information, the demand for mobile access to high data rate multimedia services including high speed internet connection, high quality video/images, teleconferencing, and file transfer continues to grow rapidly for a wide variety of military as well as commercial applications. The current mobile communication systems are narrowband and optimized for voice. They can not support high data rate applications. Simply increasing the bandwidth of existing systems will result in severe degradation due to frequency selective fading, resulting in loss of quality and reliability. It appears that CDMA is the strongest candidate for the third generation mobile communication systems to support these demands. CDMA minimizes the effects of frequency selective fading while reducing the probability of detection and interception by non-authorized users. The primary restriction of the performance of CDMA is the co-channel interference. Since CDMA capacity is only interference limited, the interference reduction equates to better quality of service and greater user capacity. This thesis focuses on analyzing the co-channel interference on the reverse channel of the proposed CDMA cellular systems operating with perfect power control and investigating methods such as sectoring and microzoning in an effort to reduce the interference.
Download or read book CDMA Cellular Mobile Communications and Network Security written by Man Young Rhee and published by Prentice Hall. This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: CDMA has emerged as the leading technology for today's new generation of PCS wireless networks. This is a complete guide to designing, optimizing and securing CDMA systems.
Download or read book Introduction to CDMA Wireless Communications written by Mosa Ali Abu-Rgheff and published by Academic Press. This book was released on 2007-09-10 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gives an in-depth study of the principles of the spread spectrum techniques and their applications in mobile communications. It starts with solid foundations in the digital communications that are essential to unequivocal understanding of the CDMA technology, and guides the reader through the fundamentals and characteristics of cellular CDMA communications. Features include:* A very clear and thorough description of the principles and applications of spread spectrum techniques in multi-user mobile communications.* Matlab-based worked examples, exercises and practical sessions to clearly explain the theoretical concepts.* An easy-to-read explanation of the air interface standards used in IS-95 A/B, cdma2000, and 3G WCDMA.* Clear presentations of the high speed downlink and uplink packet access (HSDPA/HSUPA) techniques used in 3G WCDMA.The book is a very suitable introduction to the principles of CDMA communications for senior undergraduate and graduate students, as well researchers and engineers in industry who are looking to develop their expertise. - A very clear and thorough description of the principles and applications of spread spectrum techniques in multi-user mobile communications. - Matlab-based worked examples, exercises and practical sessions to clearly explain the theoretical concepts. - An easy-to-read explanation of the air interface standards used in IS-95 A/B, cdma2000, and 3G WCDMA. - Clear presentations of the high speed downlink and uplink packet access (HSDPA/HSUPA) techniques used in 3G WCDMA.
Download or read book IS 95 CDMA and cdma2000 written by Vijay K. Garg and published by Pearson Education. This book was released on 1999-12-09 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Next Generation: Wireless Communications for Multimedia and Beyond Of all wireless technologies for personal communications, Code Division Multiple Access (CDMA) offers the best combination of good signal quality, high security, low power consumption, and excellent system reliability. Features added in the IS-95 standard means this impressive list now also includes Third Generation (3G) data capabilities that will allow CDMA providers to offer Internet and intranet services for multimedia applications, high-speed business transactions, and telemetry. The upcoming cdma2000 standard will further expand usable bandwidth without sacrificing voice quality or requiring additional spectrum. In this book by an experienced telecommunications authority, you will learn how to maximize the power of CDMA, migrate existing systems to the newest standards, and prepare for a smooth transition to features yet to come. IS-95 CDMA and cdma2000: Cellular/PCS Systems Implementation covers all aspects of up-to-date CDMA implementation and operation, including: Coding and architecture Radio interface and call flow Physical, data link, and signaling layers Handoff and power control System security Wireless Data Reverse and Forward Link Capacity RF Engineering and network planning Evolution to Third Generation systems Practicing engineers and their managers will benefit from the in-depth coverage of IS-95 systems, RF engineering, and capacity planning. Students will appreciate the forward-looking approach that offers a look at the future of the industry where they are preparing for careers. IS-95 CDMA and cdma2000: Cellular/PCS Systems Implementation offers both practical applications information and conveniently organized reference materials for anyone interested in the next generation of wireless telecommunications.
Download or read book Reverse Link Channel Access Techniques for CDMA Packet Networks written by Subramaniam Alagan Anpalagan and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we propose, analyze and assess three novel radio channel access techniques to effectively manage the interference in the reverse links of a cellular CDMA network with the emphasis on the packet data applications. The first scheme is based on the combined use of rate, power and cell control, whereby base station receivers attempt to operate with equal receive power. In the second approach, the temporal variations of the channels are exploited to schedule packet-transmissions in different modes of operations. The third technique uses the overlapping sectors for adaptive sectoring of a cell based on the non-uniform angular traffic around the base stations. All of these approaches are systematically developed based on the fact that both the interference-reduction and the interference-balancing improve the CDMA system performance. The techniques in effect implement interference control at the system level respectively (a) exploiting the source characteristics of the mobiles for network-wide interference-balancing, (b) time separating the signals based on the relative channel conditions and delaying dominant interferers and (c) jointly selecting the best possible set of antenna based on the angular traffic at the antenna and making the user assignment that minimizes the total transmit power. Algorithms for base station selection, transmission rate adjustment and mobile power adaptation for the above schemes are also discussed. Simulation results and numerical examples that compare ours with previously reported techniques demonstrate the effectiveness of the new techniques.
Download or read book CDMA Radio with Repeaters written by Joseph Shapira and published by Springer Science & Business Media. This book was released on 2007-12-14 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Instantaneous Reverse link Capacity in Cellular CDMA Networks with Non uniform Spatial Caller Distributions written by Peter Edward Bausbacher and published by . This book was released on 1991 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IS 95 CDMA and Cdma2000 Cellular PCS Systems Implementation written by Garg and published by Pearson Education India. This book was released on with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CDMA Systems Capacity Engineering written by Kiseon Kim and published by Artech House Publishers. This book was released on 2005 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new hands-on resource tackles capacity planning and engineering issues that are crucial to optimizing wireless communication systems performance. Going beyond the system physical level and investigating CDMA system capacity at the service level, this volume is the single-source for engineering and analyzing systems capacity and resources.
Download or read book Code Division Multiple Access CDMA written by R. Michael and published by Springer Nature. This book was released on 2022-05-31 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the basic aspects of Code Division Multiple Access or CDMA. It begins with an introduction to the basic ideas behind fixed and random access systems in order to demonstrate the difference between CDMA and the more widely understood TDMA, FDMA or CSMA. Secondly, a review of basic spread spectrum techniques are presented which are used in CDMA systems including direct sequence, frequency-hopping and time-hopping approaches. The basic concept of CDMA is presented, followed by the four basic principles of CDMA systems that impact their performance: interference averaging, universal frequency reuse, soft handoff, and statistical multiplexing. The focus of the discussion will then shift to applications. The most common application of CDMA currently is cellular systems. A detailed discussion on cellular voice systems based on CDMA, specifically IS-95, is presented. The capacity of such systems will be examined as well as performance enhancement techniques such as coding and spatial filtering. Also discussed are Third Generation CDMA cellular systems and how they differ from Second Generation systems. A second application of CDMA that is covered is spread spectrum packet radio networks. Finally, there is an examination of multi-user detection and interference cancellation and how such techniques impact CDMA networks. This book should be of interest and value to engineers, advanced students, and researchers in communications.
Download or read book Theory of Code Division Multiple Access Communication written by Kamil Sh. Zigangirov and published by John Wiley & Sons. This book was released on 2004-05-10 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to CDMA theory and application Code division multiple access (CDMA) communication is rapidly replacing time- and frequency-division methods as the cornerstone of wireless communication and mobile radio. Theory of Code Division Multiple Access Communication provides a lucid introduction and overview of CDMA concepts and methods for both the professional and the advanced student. Emphasizing the role CDMA has played in the development of wireless communication and cellular mobile radio systems, the author leads you through the basic concepts of mobile radio systems and considers the different principles of multiple access-time division, frequency division, and code division. He then analyzes three major CDMA systems-direct sequence (DS) CDMA systems, frequency hopped (FH) CDMA systems, and pulse position hopped (PPH) CDMA systems. Other topics covered include: * Spread spectrum (SS) technology * Forward error control coding * CDMA communication on fading channels * Pseudorandom signals * Information theory in relation to CDMA communication * CDMA cellular networks Complete with useful appendices providing analyses of the moments of CDMA system decision statistics, Theory of Code Division Multiple Access Communication is a ready reference for every engineer seeking an understanding of the history and concepts of this key communications technology.
Download or read book The cdma2000 System for Mobile Communications written by Vanghi and published by Pearson Education India. This book was released on 2004 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Communications written by Savo G. Glisic and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Capacity Analysis for a CDMA System written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Mobile Communication written by Gordon L. Stüber and published by Springer. This book was released on 2017-05-30 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: This mathematically rigorous overview of physical layer wireless communications is now in a 4th, fully revised and updated edition. The new edition features new content on 4G cellular systems, 5G cellular outlook, bandpass signals and systems, and polarization, among many other topics, in addition to a new chapters on channel assignment techniques. Along with coverage of fundamentals and basic principles sufficient for novice students, the volume includes finer details that satisfy the requirements of graduate students aiming to conduct in-depth research. The book begins with a survey of the field, introducing issues relevant to wireless communications. The book moves on to cover relevant discrete subjects, from radio propagation, to error probability performance, and cellular radio resource management. An appendix provides a tutorial on probability and random processes. The content stresses core principles that are applicable to a broad range of wireless standards. New examples are provided throughout the book to better explain the more complex material to the reader. Additional problems have also been added to those already appearing at the ends of the chapters to make the book more suitable for course instruction.
Download or read book Reverse link Capacity in Mobile CDMA Cellular Networks written by Jason S. Skinner and published by . This book was released on 2002 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
