Blind Channel Estimation for Orthogonal Space-time Block Codes in MISO Systems [microform] PDF Download
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Author: Elzbieta Beres
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612914728
Category :
Languages : en
Pages : 126
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Book Description
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.
![Blind Channel Estimation for Orthogonal Space-time Block Codes in MISO Systems [microform] PDF](https://books.google.com/books/content/images/frontcover/OrfgAAAACAAJ?fife=w80-h100)
Author: Elzbieta Beres
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612914728
Category :
Languages : en
Pages : 126
Get Book
Book Description
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: Jacob Benesty
Publisher: Springer Science & Business Media
ISBN: 3540491252
Category : Technology & Engineering
Languages : en
Pages : 1170
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Book Description
This handbook plays a fundamental role in sustainable progress in speech research and development. With an accessible format and with accompanying DVD-Rom, it targets three categories of readers: graduate students, professors and active researchers in academia, and engineers in industry who need to understand or implement some specific algorithms for their speech-related products. It is a superb source of application-oriented, authoritative and comprehensive information about these technologies, this work combines the established knowledge derived from research in such fast evolving disciplines as Signal Processing and Communications, Acoustics, Computer Science and Linguistics.
Author: Andrea Bonarini
Publisher: Springer Science & Business Media
ISBN: 3790817686
Category : Computers
Languages : en
Pages : 231
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Book Description
The papers collected in this book are concerned with the application of the so-called "soft-computing" techniques to the aim of defining flexible systems. The topics covered witness the actual research trend towards an integration of distinct formal techniques for defining flexible systems. The contributions in this volume mainly concern the definition of systems in several application fields, such as image processing, control, asset allocation, medicine, time series forecasting, qualitative modeling, support to design, reliability analysis, diagnosis, filtering, data analysis, land mines detection and so forth. The papers presented in this volume are organized into three main thematic sections: Fuzzy Systems, Neural Networks and Genetic and Evolutionary Algorithms, although, as outlined before, some works employ more than one technique from these fields.
Author: Jörn Mehnen
Publisher: Springer
ISBN: 9783540896180
Category : Mathematics
Languages : en
Pages : 536
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Book Description
WSC2008Chair’s Welcome Message Dear Colleague, The World Soft Computing (WSC) conference is an annual international online conference on applied and theoretical soft computing technology. This WSC 2008 is the thirteenth conference in this series and it has been a great success. We received a lot of excellent paper submissions which were peer-reviewed by an international team of experts. Only60 papers out of111 submissions were selected for online publication. This assured a high quality standard for this online conference. The corresponding online statistics are a proof of the great world-wide interest in the WSC 2008 conference. The conference website had a total of33,367di?erent human user accessesfrom43 countries with around100 visitors every day,151 people signed up to WSC to discuss their scienti?c disciplines in our chat rooms and the forum. Also audio and slide presentations allowed a detailed discussion of the papers. The submissions and discussions showed that there is a wide range of soft computing applications to date. The topics covered by the conference range from applied to theoretical aspects of fuzzy, neuro-fuzzy and rough sets over to neural networks to single and multi-objective optimisation. Contributions aboutparticleswarmoptimisation,geneexpressionprogramming,clustering, classi?cation,supportvectormachines,quantumevolutionandagentsystems have also been received. One whole session was devoted to soft computing techniques in computer graphics, imaging, vision and signal processing.
Author: Walter Fischer
Publisher: Springer Science & Business Media
ISBN: 3540763589
Category : Technology & Engineering
Languages : en
Pages : 588
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Book Description
This essential text for any technician in broadcasting deals with all the most important digital television, sound radio and multimedia standards. The book provides an in-depth look at these subjects in terms of practical experience. In addition it contains chapters on the basics of technologies such as analog television, digital modulation, COFDM or mathematical transformations between time and frequency domains. The attention in each respective field under discussion is focused on aspects of measuring techniques and of measuring practice, in each case consolidating the knowledge imparted with numerous practical examples. Since the entire field of electrical communications technology is traversed in a wide arc, those who are students in this field are not excluded either.
Author: Oliver Nelles
Publisher: Springer Science & Business Media
ISBN: 3662043238
Category : Technology & Engineering
Languages : en
Pages : 785
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Book Description
Written from an engineering point of view, this book covers the most common and important approaches for the identification of nonlinear static and dynamic systems. The book also provides the reader with the necessary background on optimization techniques, making it fully self-contained. The new edition includes exercises.
Author: Erel Avineri
Publisher: Springer Science & Business Media
ISBN: 3540880798
Category : Computers
Languages : en
Pages : 287
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Book Description
Soft Computing is a complex of methodologies that includes artificial neural networks, genetic algorithms, fuzzy logic, Bayesian networks, and their hybrids. It admits approximate reasoning, imprecision, uncertainty and partial truth in order to mimic the remarkable human capability of making decisions in real-life, ambiguous environments. Soft Computing has therefore become popular in developing systems that encapsulate human expertise. 'Applications of Soft Computing: Updating the State of Art' contains a collection of papers that were presented at the 12th On-line World Conference on Soft Computing in Industrial Applications, held in October 2007. This carefully edited book provides a comprehensive overview of the recent advances in the industrial applications of soft computing and covers a wide range of application areas, including design, intelligent control, optimization, signal processing, pattern recognition, computer graphics, production, as well as civil engineering and applications to traffic and transportation systems. The book is aimed at researchers and practitioners who are engaged in developing and applying intelligent systems principles to solving real-world problems. It is also suitable as wider reading for science and engineering postgraduate students.
Author: Anne Stibbs
Publisher:
ISBN:
Category : Crossword puzzles
Languages : en
Pages : 0
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Author: Merlin C. Wittrock
Publisher:
ISBN:
Category : Education
Languages : en
Pages : 678
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Author: United States. National Archives and Records Service. Office of Records and Information Management
Publisher:
ISBN:
Category : Business
Languages : en
Pages : 232
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Book Description
