Download or read book Adaptive Distributed Detection with Applications to Cellular CDMA written by Jian-Guo Chen and published by . This book was released on 1997 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chair and Varshney have derived an optimal rule for fusing decisions based on the Bayesian criterion. To implement the rule, probabilities of detection PD and false alarm PF for each detector must be known, which is not readily available in practice. This dissertation presents an adaptive fusion model which estimates the PD and PF adaptively by a simple counting process. Since reference signals are not given, the decision of a local detector is arbitrated by the fused decision of all the other local detectors. Adaptive algorithms for both equal probable and unequal probable sources, for independent and correlated observations are developed and analyzed, respectively. The convergence and error analysis of the system are analytically proven and demonstrated by simulations. In addition, in this dissertation, the performance of four practical fusion rules in both independent and correlated Gaussian noise is analyzed, and compared in terms of their Receiver Operating Characteristics (ROCs). Various factors that affect the fusion performance are considered in the analysis. By varying the local decision thresholds, the Rocs under the influence of the number of sensors, signal-to-noise ratio (SNR), the deviation of local decision probabilities, and correlation coefficient, are computed and plotted, respectively. Several interesting and key observations on the performance of fusion rules are drawn from the analysis. As an application of the above theory, a decentralized or distributed scheme in which each fusion center is connected with three widely spaced base stations is proposed for digital cellular code-division multi-access communications. Detected results at each base station are transmitted to the fusion center where the final decision is made by optimal fusion. The theoretical analysis shows that this novel structure can achieve an error probability at the fusion center which is always less than or equal to the minimum of the three respective base station. The performance comparison for binary coherent signaling in Rayleigh fading and log-normal shadowing demonstrates that the decentralized detection has a significant increased system capacity over conventional macro selection diversity. This dissertation analyzes the performance of the adaptive fusion method for macroscopic diversity combination in the wireless cellular environment when the error probability information from each base station detection is not available. The performance analysis includes the derivation of the minimum achievable error probability. An alternative realization with lower complexity of the optimal fusion scheme by using selection diversity is also proposed. The selection of the information bit in this realization is obtained either from the most reliable base station or through the majority rule from the participating base stations.

Download or read book Parallel and Distributed Processing and Applications written by Yi Pan and published by Springer Science & Business Media. This book was released on 2005-10-21 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Symposium on Parallel and Distributed Processing and Applications, ISPA 2005, held in Nanjing, China in November 2005. The 90 revised full papers and 19 revised short papers presented together with 3 keynote speeches and 2 tutorials were carefully reviewed and selected from 645 submissions. The papers are organized in topical sections on cluster systems and applications, performance evaluation and measurements, distributed algorithms and systems, fault tolerance and reliability, high-performance computing and architecture, parallel algorithms and systems, network routing and communication algorithms, security algorithms and systems, grid applications and systems, database applications and data mining, distributed processing and architecture, sensor networks and protocols, peer-to-peer algorithms and systems, internet computing and Web technologies, network protocols and switching, and ad hoc and wireless networks.

Download or read book Multiuser Detection and Performance Evaluation for Cellular DS CDMA Networks with Partial Information written by Liqing Zhang and published by . This book was released on 2003 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiuser Detection in CDMA Mobile Terminals written by Piero Castoldi and published by Artech House. This book was released on 2002 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's an authoritative, cutting-edge resource that gives you a thorough understanding of CDMA transmission and detection. It offers practical guidance in designing interference-reducing multi-user receivers for mobile radio systems and multi-user adaptive modems for accessing satellite earth stations. The book provides in-depth descriptions of CDMA principles, and of linear and non-linear multi-user detection , and covers the fine details of the realization of a linear multi-user receiver.

Download or read book Data Fusion for Adaptive Distributed Detection written by Ari Naim and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Detection for DS CDMA written by Graeme Kenneth Woodward and published by . This book was released on 1999 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive non linear predistortion in the application of CDMA wireless communications written by Tao Zhou and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Combined Adaptive Multiuser Detection for DS CDMA System written by Yishu Guo and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Application of Multiuser Detection to Cellular CDMA written by R. Michael Buehrer and published by . This book was released on 1996 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Application of Programmable DSPs in Mobile Communications written by Alan Gatherer and published by John Wiley & Sons. This book was released on 2001-12-21 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: DSPs sind programmierbare, in Echtzeit arbeitende Mikroprozessoren. Dieser Band fasst erstmals das breitgefächerte, schnell expandierende Gebiet DSP-basierter Anwendungen in der Mobilkommunikation zusammen und behandelt zahlreiche Applikationen, u.a. Modems in Mobilfunknetzen, Benutzerschnittstellen (Sprache und Video), Sicherheit und Benutzererkennung. Der Leser erhält einen Eindruck von den Herausforderungen, denen sich zukünftige DSP-Anwendungen stellen müssen.

Download or read book Parallel and Distributed Processing and Applications written by and published by . This book was released on 2005 with total page 1202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Blind Multiuser Detection with Space time Adaptive Processing for CDMA Wireless Communications written by Zhi Tian and published by . This book was released on 2000 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Semiblind Multiuser Detection for CDMA Systems written by Jahan Zaib Muhammad Ali and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel adaptive semiblind multiuser detector based on subspace tracking is proposed for CDMA systems. A comparison of blind and semiblind multiuser detectors is also presented. Blind multiuser detectors consider only the in-cell users and neglect the inter-cell interference from out-of-cell users while semiblind multiuser detectors take into account both, intra-cell and inter-cell interference. Semiblind multiuser detectors are superior to blind multiuser detectors when the codes of some users are known to a base station e.g., codes of in-cell users Vs. out-of-cell users. It is shown that using the proposed semiblind detector, a considerable improvement in the capacity of the system is achieved. Compared to the existing blind and semiblind multiuser detectors, the proposed semiblind detector exhibits faster convergence, and is more robust in the case when the system is heavily loaded. It is also computationally less expensive.

Download or read book 3G HSPA and FDD versus TDD Networking written by Lajos Hanzo and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: 3G, HSPA and FDD versus TDD Networking, Second Edition is the only book that contrasts the network capacity gains that may be achieved with the advent of adaptive antenna arrays and HSDPA-style adaptive modulation techniques in the context of FDD and TDD CDMA cellular networks. In the five years since the first edition of this book was published the wireless landscape has evolved further. The new book addresses the recent developments in the field of HSDPA-style wireless networking, focusing particularly on the issues and challenges of FDD versus TDD networking. These solutions are particularly powerful in shadow-faded scenarios, when the antenna array elements experience correlated, rather than independent fading. Furthermore, the flexible up-link/down-link time-slot allocation of TDD is beneficial for supporting the Wireless Internet, but results in erratic interference fluctuations, which is efficiently combated by the antenna arrays and adaptive modulation. Additionally, whilst the adaptive modulation aided system simply drops the instantaneous transmission rate during instances of high interference, conventional networks would drop the call. Builds on successful previous edition to include recent developments in the field of HSDPA-style wireless networking Provides an all-encompassing self-contained overview of the subject for a wide range of readers of all levels. Treats the topics of both physical-layer and network-layer aspects of wireless systems using a cross-layer optimization approach. One of the first books to contrast in detail both FDD and TDD networking. The material is presented clearly and logically allowing the uninitiated reader to commence reading it at fundamental non-mathematical conceptual level at the beginning of the book, while advanced readers can turn directly to the required chapter describing solutions to a number of wireless FDD or TDD networking problems. This book will inspire researchers, practicing engineers, operators, marketing engineers and advanced postgraduates.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Next Generation Wireless Systems and Networks written by Hsiao-Hwa Chen and published by John Wiley & Sons. This book was released on 2006-05-01 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book The Froehlich Kent Encyclopedia of Telecommunications written by Fritz E. Froehlich and published by CRC Press. This book was released on 1999-04-27 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Wireless Multiple Access Adaptive Communications Technique to Zworykin, Vladimir Kosma"