Download or read book A Successive Overrelaxation Iterative Technique for an Adaptive Equalizer written by Ostap S. Kosovych and published by . This book was released on 1973 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study deals with an adaptive strategy for the equalization of pulse-amplitude-modulated signals in the presence of intersymbol interference and additive note. The successive overrelaxation iterative technique is used as the algorithm for the iterative adjustment of the equalizer coefficients during a training period for the minimization of the mean square error. With 2-cyclic and non-negative Jacobi matrices substantial improvement was demonstrated in the rate of convergence over the commonly used gradient techniques. The Jacobi theorems were also extended to non-positive Jacobi matrices. Numerical examples strongly indicate that the improvements obtained for the special cases are possible for general channel characteristics. The technique was analytically demonstrated to decrease the mean square error (norm) at each iteration for a large range of parameter values for light or moderate intersymbol interference and for small intervals for general channels. Again, numerical examples indicate that the norm-decreasing property is valid for a much larger parameter range for all types of intersymbol interference. Analytically, convergence of the relaxation algorithm was proven in a noisy environment and the coefficient variance was demonstrated to be bounded. Numerical simulations conducted indicate that the relaxation algorithm consistently converged much faster than the gradient techniques; hence, it requires much less time in the training period than do the gradients.

Download or read book A Successive Overrelaxation Iterative Technique for an Adaptive Equalizer written by Ostap S. Kosovych and published by . This book was released on 1973 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Successive Overrelaxation Iterative Technique for an Adaptive Equalizer written by Ostap S. Kosovych and published by . This book was released on 1973 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Norms of the successive overrelaxation method and related methods written by David M. Young and published by . This book was released on 1969 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Norms of several iterative methods for solving the linear system Au = b are developed. These methods include the successive overrelaxation method, the cyclic Chebyshev semi-iterative method, and other related methods. Theoretical and numerical comparisons are given for the iterative methods and norms considered. The results indicate that by using a different norm than was previously considered, the successive overrelaxation method compares more favorably with the cyclic Chebyshev semi-iterative and with the other iterative methods considered. (Author).

Download or read book Analysis of Controlled Over relaxation written by Curtis J. Anderson and published by . This book was released on 2012 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: To solve a large system of linear equations, iterative methods can often be faster and more accurate than direct methods such as Gaussian elimination. A stationary iterative method can be derived from a splitting of the coefficient matrix as the difference of two matrices and generates a sequence of vectors that is expected to converge to the solution. Convergence depends on whether the spectral radius of the iteration matrix is within unity. Certain splittings generate different, well-known methods such as the Jacobi, Gauss-Seidel, and successive over-relaxation (SOR) iterative methods. Controlled over-relaxation (COR) is an extrapolated iterative method that is applicable to any splitting and its convergence depends on whether all the eigenvalues of the iteration matrix lie on one side of the vertical line x=1. This thesis presents several theorems on the convergence of COR. It is shown that for the optimal relaxation parameter COR converges at least as fast as the corresponding iterative method. Also, it is shown that for positive definite matrices, applying COR to the splitting of SOR will enlarge the interval on which the parameter for SOR may belong to. Bounds on the SOR parameter are derived. In addition to the study of well-known splittings, a theorem is presented that defines a class of splittings that is guaranteed convergent for COR. With a large sample of matrices the convergence of COR is compared to the corresponding Jacobi, Gauss-Seidel, and SOR methods. Additionally, matrix weighted extrapolated methods are considered and for a special case the optimal situation is studied.

Download or read book A Specialized Comparison of the Successive Overrelaxation and Alternating Direction Implicit Iterative Methods written by Charles Edward Lewis and published by . This book was released on 1967 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1972 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Equalizers for Digital Modems written by A. P. Clark and published by John Wiley & Sons. This book was released on 1985 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Data transmission Systems written by A. P. Clark and published by John Wiley & Sons. This book was released on 1977 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1973-06-25 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1973 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1972 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Massive MIMO Systems written by Kazuki Maruta and published by MDPI. This book was released on 2020-07-03 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple-input, multiple-output (MIMO), which transmits multiple data streams via multiple antenna elements, is one of the most attractive technologies in the wireless communication field. Its extension, called ‘massive MIMO’ or ‘large-scale MIMO’, in which base station has over one hundred of the antenna elements, is now seen as a promising candidate to realize 5G and beyond, as well as 6G mobile communications. It has been the first decade since its fundamental concept emerged. This Special Issue consists of 19 papers and each of them focuses on a popular topic related to massive MIMO systems, e.g. analog/digital hybrid signal processing, antenna fabrication, and machine learning incorporation. These achievements could boost its realization and deepen the academic and industrial knowledge of this field.

Download or read book Turbo Code Applications written by Keattisak Sripimanwat and published by Springer Science & Business Media. This book was released on 2006-02-23 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbo Code Applications: a journey from a paper to realization presents c- temporary applications of turbo codes in thirteen technical chapters. Each chapter focuses on a particular communication technology utilizing turbo codes, and they are written by experts who have been working in related th areas from around the world. This book is published to celebrate the 10 year anniversary of turbo codes invention by Claude Berrou Alain Glavieux and Punya Thitimajshima (1993-2003). As known for more than a decade, turbo code is the astonishing error control coding scheme which its perf- mance closes to the Shannon’s limit. It has been honored consequently as one of the seventeen great innovations during the ?rst ?fty years of information theory foundation. With the amazing performance compared to that of other existing codes, turbo codes have been adopted into many communication s- tems and incorporated with various modern industrial standards. Numerous research works have been reported from universities and advance companies worldwide. Evidently, it has successfully revolutionized the digital commu- cations. Turbo code and its successors have been applied in most communications startingfromthegroundorterrestrialsystemsofdatastorage,ADSLmodem, and ?ber optic communications. Subsequently, it moves up to the air channel applications by employing to wireless communication systems, and then ?ies up to the space by using in digital video broadcasting and satellite com- nications. Undoubtedly, with the excellent error correction potential, it has been selected to support data transmission in space exploring system as well.

Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Intelligence in Biomedical Engineering written by Rezaul Begg and published by CRC Press. This book was released on 2007-12-04 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: As in many other fields, biomedical engineers benefit from the use of computational intelligence (CI) tools to solve complex and non-linear problems. The benefits could be even greater if there were scientific literature that specifically focused on the biomedical applications of computational intelligence techniques. The first comprehensive field-