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Semi Blind Channel Estimation Using Second Order Statistics And Its Application To Time Reversal Space Time Block Codes Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Semi Blind Channel Estimation Using Second Order Statistics And Its Application To Time Reversal Space Time Block Codes book. This book definitely worth reading, it is an incredibly well-written.
Author : Hemanth Mullar Srikantaiah
Publisher : Unknown
Page : 86 pages
File Size : 52,6 Mb
Release : 2006
Category : Electronic
ISBN : CORNELL:31924104879279
Author : Elzbieta Beres
Publisher : National Library of Canada = Bibliothèque nationale du Canada
Page : 126 pages
File Size : 50,8 Mb
Release : 2004
Category : Electronic
ISBN : 0612914720
This thesis presents a closed-form, blind channel estimation scheme for Alamouti's and other orthogonal STBC. Unlike other blind channel estimation algorithms used in such systems, the scheme is able to estimate the channels, to within a phase constant, in multiple-input single-output systems, i.e. systems that employ only one receive antenna. The channel matrix is estimated from the eigenvalue decomposition of the fourth order cumulant matrix of the output signal. The performance of the scheme depends partly upon the accuracy of the estimated cumulants, and thus a scheme to improve the cumulant matrix estimate is suggested. Using these improved cumulants, the algorithm performs very well in slowly changing channel conditions. A single pilot-tuple is required to correctly assign the estimated to the actual channels and to resolve the phase ambiguity common to all blind estimators. The main disadvantage of the scheme is its higher complexity related to the estimation of higher order cumulants; this complexity can be reduced by exploiting the symmetry inherent in the cumulant matrix. Furthermore, it is shown that to achieve good performance in terms of bit error rate, 1000 sample points are sufficient to estimate the cumulant matrix.
Author : Nejib Ammar
Publisher : Unknown
Page : 340 pages
File Size : 51,5 Mb
Release : 2005
Category : Electronic
ISBN : UCAL:X74187
Author : Anonim
Publisher : Unknown
Page : 584 pages
File Size : 51,8 Mb
Release : 2004
Category : Computers
ISBN : UIUC:30112043461109
Author : Erik G. Larsson,Petre Stoica
Publisher : Cambridge University Press
Page : 304 pages
File Size : 49,9 Mb
Release : 2008-06-12
Category : Technology & Engineering
ISBN : 052106533X
Space-time coding is a technique that promises greatly improved performance in wireless networks by using multiple antennas at the transmitter and receiver. Space-Time Block Coding for Wireless Communications is an introduction to the theory of this technology. The authors develop the topic using a unified framework and cover a variety of topics ranging from information theory to performance analysis and state-of-the-art space-time coding methods for both flat and frequency-selective fading multiple-antenna channels. The authors concentrate on key principles rather than specific practical applications, and present the material in a concise and accessible manner. Their treatment reviews the fundamental aspects of multiple-input, multiple output communication theory, and guides the reader through a number of topics at the forefront of current research and development. The book includes homework exercises and is aimed at graduate students and researchers working on wireless communications, as well as practitioners in the wireless industry.
Author : Anonim
Publisher : Unknown
Page : 2264 pages
File Size : 47,7 Mb
Release : 1992
Category : Engineering
ISBN : MINN:31951D007723216
Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Author : Stephen Wai-Bun Lam
Publisher : Library and Archives Canada = Bibliothèque et Archives Canada
Page : 398 pages
File Size : 55,5 Mb
Release : 2005
Category : Electronic
ISBN : 0494027711
In multiplicative fading channels, the commonly used symmetric signal constellations and space-time block codes cause ambiguities since joint channel estimation and data detection (CE/DD) schemes cannot differentiate certain sequences of symbols in single-input single-output (SISO) systems and certain sequences of space-time block codewords in multiple-input multiple-output (MIMO) systems. This phenomenon; known as isometry; leads to irreducible estimation and detection error floors. Since the channel state has to be estimated in most practical communications systems, isometry degrades the performances of such systems. This thesis introduces a unifying framework that effectively eliminates isometry by using asymmetric modulation schemes: one algorithm is proposed to construct asymmetric signal constellations to solve isometry in SISO systems, two algorithms are proposed to construct asymmetric space-time block codes (STBCs) to mitigate isometry. To further improve the estimation and detection performances of CE/DD schemes, a self-matching STBC is proposed in this thesis. The self-matching STBC improves detection performance by adapting its code properties according to the estimation error calculated by the Kalman recursion; by improving estimation performance using embedded training, and by breaking isometry with asymmetry. These asymmetric modulation schemes are shown in this thesis, both analytically and via simulations, to be novel, simple, effective and robust solutions to isometry.
Author : David Tse,Pramod Viswanath
Publisher : Cambridge University Press
Page : 598 pages
File Size : 48,8 Mb
Release : 2005-05-26
Category : Computers
ISBN : 0521845270
This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. An abundant supply of exercises make it ideal for graduate courses in electrical and computer engineering and it will also be of great interest to practising engineers.
Author : Arogyaswami Paulraj,Rohit Nabar,Dhananjay Gore
Publisher : Cambridge University Press
Page : 314 pages
File Size : 45,8 Mb
Release : 2003-05-29
Category : Computers
ISBN : 0521826152
An accessible introduction to the theory of space-time wireless communications.
Author : Lajos Hanzo,T. H. Liew,B. L. Yeap,R. Y. S. Tee,Soon Xin Ng
Publisher : John Wiley & Sons
Page : 839 pages
File Size : 54,8 Mb
Release : 2011-05-03
Category : Technology & Engineering
ISBN : 9780470978337
Covering the full range of channel codes from the most conventional through to the most advanced, the second edition of Turbo Coding, Turbo Equalisation and Space-Time Coding is a self-contained reference on channel coding for wireless channels. The book commences with a historical perspective on the topic, which leads to two basic component codes, convolutional and block codes. It then moves on to turbo codes which exploit iterative decoding by using algorithms, such as the Maximum-A-Posteriori (MAP), Log-MAP and Soft Output Viterbi Algorithm (SOVA), comparing their performance. It also compares Trellis Coded Modulation (TCM), Turbo Trellis Coded Modulation (TTCM), Bit-Interleaved Coded Modulation (BICM) and Iterative BICM (BICM-ID) under various channel conditions. The horizon of the content is then extended to incorporate topics which have found their way into diverse standard systems. These include space-time block and trellis codes, as well as other Multiple-Input Multiple-Output (MIMO) schemes and near-instantaneously Adaptive Quadrature Amplitude Modulation (AQAM). The book also elaborates on turbo equalisation by providing a detailed portrayal of recent advances in partial response modulation schemes using diverse channel codes. A radically new aspect for this second edition is the discussion of multi-level coding and sphere-packing schemes, Extrinsic Information Transfer (EXIT) charts, as well as an introduction to the family of Generalized Low Density Parity Check codes. This new edition includes recent advances in near-capacity turbo-transceivers as well as new sections on multi-level coding schemes and of Generalized Low Density Parity Check codes Comparatively studies diverse channel coded and turbo detected systems to give all-inclusive information for researchers, engineers and students Details EXIT-chart based irregular transceiver designs Uses rich performance comparisons as well as diverse near-capacity design examples
Author : Lajos Hanzo,C. H. Wong,M. S. Yee
Publisher : Wiley-IEEE Press
Page : 760 pages
File Size : 48,7 Mb
Release : 2002-04-03
Category : Technology & Engineering
ISBN : UOM:39015054375574
Adaptive Wireless Transceivers provides the reader with a broad overview of near-instantaneously adaptive transceivers in the context of TDMA, CDMA and OFDM systems. The adaptive transceivers examined employ powerful turbo codecs, turbo equalisers and space-time codecs, equipping the reader with a future-proof technological road map. It demonstrates that adaptive transceivers are capable of mitigating the channel quality fluctuations of the wireless channel as a lower-complexity alternative to space-time coding. By contrast, if the higher complexity of multiple transmitters and multiple receiver-assisted systems is deemed acceptable, the advantages of adaptability erode. Provides an in-depth introduction to channel equalisers and Kalman filtering and discusses the associated complexity versus performance trade-offs Introduces wideband near-instantaneously adaptive transceivers and studies their performance both with and without turbo channel coding Describes how to optimise adaptive modulation mode switching and highlights a range of practical considerations Introduces neural network based channel equalisers and discusses Radial Basis Function (RBF) assisted equalisers embedded into adaptive modems supported by turbo channel coding and turbo channel equalisation Employs the above adaptive principles also in the context of CDMA and OFDM transceivers and discusses the pros and cons of space-time coding versus adaptive modulation Researchers, advanced students and practising development engineers working in wireless communications will all find this valuable text an informative read.
Author : Lajos Hanzo,Yosef Akhtman,Li Wang,Ming Jiang
Publisher : John Wiley & Sons
Page : 693 pages
File Size : 44,8 Mb
Release : 2012-01-03
Category : Technology & Engineering
ISBN : 9781119972990
MIMO-OFDM for LTE, WIFI and WIMAX: Coherent versus Non-Coherent and Cooperative Turbo-Transceivers provides an up-to-date portrayal of wireless transmission based on OFDM techniques augmented with Space-Time Block Codes (STBCs) and Spatial-Division Multiple Access (SDMA). The volume also offers an in-depth treatment of cutting-edge Cooperative Communications. This monograph collates the latest techniques in a number of specific design areas of turbo-detected MIMO-OFDM wireless systems. As a result a wide range of topical subjects are examined, including channel coding and multiuser detection (MUD), with a special emphasis on optimum maximum-likelihood (ML) MUDs, reduced-complexity genetic algorithm aided near-ML MUDs and sphere detection. The benefits of spreading codes as well as joint iterative channel and data estimation are only a few of the radical new features of the book. Also considered are the benefits of turbo and LDPC channel coding, the entire suite of known joint coding and modulation schemes, space-time coding as well as SDM/SDMA MIMOs within the context of various application examples. The book systematically converts the lessons of Shannon's information theory into design principles applicable to practical wireless systems; the depth of discussions increases towards the end of the book. Discusses many state-of-the-art topics important to today's wireless communications engineers. Includes numerous complete system design examples for the industrial practitioner. Offers a detailed portrayal of sphere detection. Based on over twenty years of research into OFDM in the context of various applications, subsequently presenting comprehensive bibliographies.
Author : David J. C. MacKay
Publisher : Cambridge University Press
Page : 694 pages
File Size : 49,5 Mb
Release : 2003-09-25
Category : Computers
ISBN : 0521642981
Information theory and inference, taught together in this exciting textbook, lie at the heart of many important areas of modern technology - communication, signal processing, data mining, machine learning, pattern recognition, computational neuroscience, bioinformatics and cryptography. The book introduces theory in tandem with applications. Information theory is taught alongside practical communication systems such as arithmetic coding for data compression and sparse-graph codes for error-correction. Inference techniques, including message-passing algorithms, Monte Carlo methods and variational approximations, are developed alongside applications to clustering, convolutional codes, independent component analysis, and neural networks. Uniquely, the book covers state-of-the-art error-correcting codes, including low-density-parity-check codes, turbo codes, and digital fountain codes - the twenty-first-century standards for satellite communications, disk drives, and data broadcast. Richly illustrated, filled with worked examples and over 400 exercises, some with detailed solutions, the book is ideal for self-learning, and for undergraduate or graduate courses. It also provides an unparalleled entry point for professionals in areas as diverse as computational biology, financial engineering and machine learning.
Author : Tzi-Dar Chiueh,Pei-Yun Tsai
Publisher : John Wiley & Sons
Page : 278 pages
File Size : 52,5 Mb
Release : 2008-04-15
Category : Technology & Engineering
ISBN : 9780470822487
Orthogonal frequency-division multiplexing (OFDM) access schemes are becoming more prevalent among cellular and wireless broadband systems, accelerating the need for smaller, more energy efficient receiver solutions. Up to now the majority of OFDM texts have dealt with signal processing aspects. To address the current gap in OFDM integrated circuit (IC) instruction, Chiueh and Tsai have produced this timely text on baseband design. OFDM Baseband Receiver Design for Wireless Communications covers the gamut of OFDM technology, from theories and algorithms to architectures and circuits. Chiueh and Tsai give a concise yet comprehensive look at digital communications fundamentals before explaining modulation and signal processing algorithms in OFDM receivers. Moreover, the authors give detailed treatment of hardware issues -- from design methodology to physical IC implementation. Closes the gap between OFDM theory and implementation Enables the reader to transfer communication receiver concepts into hardware design wireless receivers with acceptable implementation loss achieve low-power designs Contains numerous figures to illustrate techniques Features concrete design examples of MC-CDMA systems and cognitive radio applications Presents theoretical discussions that focus on concepts rather than mathematical derivation Provides a much-needed single source of material from numerous papers Based on course materials for a class in digital communication IC design, this book is ideal for advanced undergraduate or post-graduate students from either VLSI design or signal processing backgrounds. New and experienced engineers in industry working on algorithms or hardware for wireless communications devices will also find this book to be a key reference.
Author : John P. Boyd
Publisher : Courier Corporation
Page : 690 pages
File Size : 48,6 Mb
Release : 2001-12-03
Category : Mathematics
ISBN : 9780486411835
Completely revised text focuses on use of spectral methods to solve boundary value, eigenvalue, and time-dependent problems, but also covers Hermite, Laguerre, rational Chebyshev, sinc, and spherical harmonic functions, as well as cardinal functions, linear eigenvalue problems, matrix-solving methods, coordinate transformations, methods for unbounded intervals, spherical and cylindrical geometry, and much more. 7 Appendices. Glossary. Bibliography. Index. Over 160 text figures.
