Download or read book Combined Adaptive Power Rate Control in CDMA Systems written by and published by . This book was released on 2001 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, combined power and rate adaptations in the reverse channel of a multicell CDMA cellular system over a Nakagami-Lognormal frequency selective fading channel are considered. Imperfect power control, user traffic distribution, Intracell interference, co-channel interference, a RAKE receiver and spatial diversity are also considered. Numerical results obtained by Monte Carlo simulation show that power and rate adaptations result in an increase of the system capacity and prolong the mobile station's battery life.

Download or read book Novel Adaptive Power and Rate Control in Third GenerationWideband CDMA Mobile Systems written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This Dissertation proposes novel adaptive power control and rate change schemesand investigates the performance of a Wideband Code Division Multiple Access (W-CDMA)system in conjunction with these adaptive techniques. In these schemes, thetransmit power and rate are adapted to the variations of the fading channel using adaptivethresholds based on the probability distribution function (pdf) of the predicted mobilechannel power values. We define a policy similar to the traditional power control technique withthresholds except that the thresholds are set based on several regions of operation in ourAdaptive Transmitter Power Control (TPC) and Adaptive Seamless Rate Change (SRC)schemes. These regions are defined by means of the probability distribution function(pdf) of the total average channel power. The pdf is initially constructed based on thehistory of the predicted channel power values derived from the long-range predictionalgorithm. These regions can be defined such that the system operates at a constant ratioof energy per bit over noise power. In a 1-user model with one channel path, the pdf of the channel power would bean exponential or chi-square function with 2 degrees of freedom. However, in a W-CDMAsystem, normally the rake receiver has several fingers. That is, at the receiver, the system either estimates or predicts the channel coefficients at each rake finger andperforms maximal ratio combining by multiplying each finger with its conjugate or chooses the ones with the highest energy and performs maximal ratio combining on theselected fingers. In a two-user system where the multi-access interference is modeled as theStandard Gaussian Approximation (SGA), the system performance and error probabilityof our W-CDMA system becomes similar to the one for our one-user system. Consequently, in a single user detector system, when all users adopt a similar policy fortheir adaptive power and rate control, the average total Multi-Access Interference (MAI)will be reduced. Th.

Download or read book Novel Adaptive Power and Rate Control in Third Generation Wideband CDMA Mobile Systems written by Ali Soheil Sadri and published by . This book was released on 2000 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: Adaprive modulation, Transmit power control, TPC, Rate change, Multi-user, Channel prediction.

Download or read book Adaptive Power Control in CDMA Cellular Communication Systems written by Matti Rintamäki and published by . This book was released on 2003 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Capacity of DS CDMA Cellular Systems Employing Power Control and Adaptive Transmission Rate written by Bassam Mohamed Hashem and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive WCDMA written by Savo G. Glisic and published by John Wiley & Sons. This book was released on 2003-07-25 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: CDMA (Code Division Multiple Access) is one type of multiple access system used in radio communication. Other multiple access methods include TDMA, FDMA, etc. WCDMA (Wideband Code Division Multiple Access) is the main air interface used for third generation mobile communication systems - UMTS (Universal Mobile Telecommunication System) and is characterised by a wider band than CDMA. WCDMA uses a wider radio band than CDMA, which was used for 2G systems, and has a high transfer rate and increased system capacity and communication quality by statistical multiplexing, etc. WCDMA efficiently utilises the radio spectrum to provide a maximum data rate of 2 Mbit/s. Third generation mobile communication systems are scheduled for operational startup in Japan and Europe in 2001-2002. Applying high-speed data transfer and state-of-the-art radio terminal technology, third generations systems enable multimedia and are currently in the process of being standardised under 3GPP. Among the three types of system to be standardised (i.e. WCDMA, MC-CDMA, UTRA TDD), Japan and Europe will adopt WCDMA in a strategy to take the lead through superior service. This volume will cover the latest theoretical principles of WCDMA and explain why these principles are used in the standards. Starting with a general overview, the more advanced material is then gradually introduced providing an excellent roadmap for the reader. * Presents comprehensive coverage of the theoretical and practical aspects of WCDMA * Provides a detailed roadmap by presenting the material step-by-step for readers from differing backgrounds * Systematically presents the latest results in the field Ideal for Engineers, academics and postgraduate students involved in research and development, engineers involved in management and administration.

Download or read book Adaptive Power Control and Capacity Consideration for DS CDMA Personal Communication Systems written by Mohamed Amr Mokhtar and published by . This book was released on 1992 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Control and Adaptive Resource Allocation in DS CDMA Systems written by Fredrik Berggren and published by . This book was released on 2003 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Control and Adaptive Data Transmission for SC MC CDMA Systems written by Jong-Hyune Kim and published by . This book was released on 2001 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Up link Closed loop Power Control for CDMA System written by Fei Ye and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Systems Engineering in Wireless Communications written by Heikki Niilo Koivo and published by John Wiley & Sons. This book was released on 2009-11-04 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the reader with a complete coverage of radio resource management for 3G wireless communications Systems Engineering in Wireless Communications focuses on the area of radio resource management in third generation wireless communication systems from a systems engineering perspective. The authors provide an introduction into cellular radio systems as well as a review of radio resource management issues. Additionally, a detailed discussion of power control, handover, admission control, smart antennas, joint optimization of different radio resources , and cognitive radio networksis offered. This book differs from books currently available, with its emphasis on the dynamical issues arising from mobile nodes in the network. Well-known control techniques, such as least squares estimation, PID control, Kalman filers, adaptive control, and fuzzy logic are used throughout the book. Key Features: Covers radio resource management of third generation wireless communication systems at a systems level First book to address wireless communications issues using systems engineering methods Offers the latest research activity in the field of wireless communications, extending to the control engineering community Includes an accompanying website containing MATLABTM/SIMULINKTM exercises Provides illustrations of wireless networks This book will be a valuable reference for graduate and postgraduate students studying wireless communications and control engineering courses, and R&D engineers.

Download or read book Computer Applications for Security Control and System Engineering written by Tai-hoon Kim and published by Springer. This book was released on 2012-11-07 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the International Conferences on Security Technology, SecTech 2012, on Control and Automation, CA 2012, and CES-CUBE 2012, the International Conference on Circuits, Control, Communication, Electricity, Electronics, Energy, System, Signal and Simulation; all held in conjunction with GST 2012 on Jeju Island, Korea, in November/December 2012. The papers presented were carefully reviewed and selected from numerous submissions and focus on the various aspects of security technology, and control and automation, and circuits, control, communication, electricity, electronics, energy, system, signal and simulation.

Download or read book Convergence and Hybrid Information Technology written by Geuk Lee and published by Springer. This book was released on 2012-08-21 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 6th International Conference on Convergence and Hybrid Information Technology, ICHIT 2012, held in Daejeon, Korea, in August 2012. The 102 revised full papers presented were carefully reviewed and selected from 196 submissions. The papers are organized in topical sections on communications and networking; soft computing and intelligent systems; medical information and bioinformatics; security and safety systems; HCI and data mining; software and hardware engineering; image processing and pattern recognition; robotics and RFID technologies; convergence in information technology; workshop on advanced smart convergence (IWASC).

Download or read book Power Control in Wireless Cellular Networks written by Mung Chiang and published by Now Publishers Inc. This book was released on 2008 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transmit power in wireless cellular networks is a key degree of freedom in the management of interference, energy, and connectivity. Power control in both the uplink and downlink of a cellular network has been extensively studied, especially over the last 15 years, and some of the results have enabled the continuous evolution and significant impact of the digital cellular technology. This survey provides a comprehensive discussion of the models, algorithms, analysis, and methodologies in this vast and growing literature. It starts with a taxonomy of the wide range of power control problem formulations, and progresses from the basic formulation to more sophisticated ones. When transmit power is the only set of optimization variables, algorithms for fixed SIR are presented first, before turning to their robust versions and joint SIR and power optimization. This is followed by opportunistic and non-cooperative power control. Then joint control of power together with beamforming pattern, base station assignment, spectrum allocation, and transmit schedule is surveyed one-by-one. Throughout the survey, we highlight the use of mathematical language and tools in the study of power control, including optimization theory, control theory, game theory, and linear algebra. Practical implementations of some of the algorithms in operational networks are discussed in the concluding section. As illustrated by the open problems presented at the end of most chapters, in the area of power control in cellular networks, there are still many under-explored directions and unresolved issues that remain theoretically challenging and practically important.

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 LTE Advanced written by Sassan Ahmadi and published by Academic Press. This book was released on 2013-10-10 with total page 1147 pages. Available in PDF, EPUB and Kindle. Book excerpt: LTE-Advanced: A Practical Systems Approach to Understanding 3GPP LTE Releases 10 and 11 Radio Access Technologies is an in-depth, systematic and structured technical reference on 3GPP's LTE-Advanced (Releases 10 and 11), covering theory, technology and implementation, written by an author who has been involved in the inception and development of these technologies for over 20 years. The book not only describes the operation of individual components, but also shows how they fit into the overall system and operate from a systems perspective. Uniquely, this book gives in-depth information on upper protocol layers, implementation and deployment issues, and services, making it suitable for engineers who are implementing the technology into future products and services. Reflecting the author's 25 plus years of experience in signal processing and communication system design, this book is ideal for professional engineers, researchers, and graduate students working in cellular communication systems, radio air-interface technologies, cellular communications protocols, advanced radio access technologies for beyond 4G systems, and broadband cellular standards. - An end-to-end description of LTE/LTE-Advanced technologies using a top-down systems approach, providing an in-depth understanding of how the overall system works - Detailed algorithmic descriptions of the individual components' operation and inter-connection - Strong emphasis on implementation and deployment scenarios, making this a very practical book - An in-depth coverage of theoretical and practical aspects of LTE Releases 10 and 11 - Clear and concise descriptions of the underlying principles and theoretical concepts to provide a better understanding of the operation of the system's components - Covers all essential system functionalities, features, and their inter-connections based on a clear protocol structure, including detailed signal flow graphs and block diagrams - Includes methodologies and results related to link-level and system-level evaluations of LTE-Advanced - Provides understanding and insight into the advanced underlying technologies in LTE-Advanced up to and including Release 11: multi-antenna signal processing, OFDM, carrier aggregation, coordinated multi-point transmission and reception, eICIC, multi-radio coexistence, E-MBMS, positioning methods, real-time and non-real-time wireless multimedia applications

Download or read book Globecom written by and published by . This book was released on 2000 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: