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1000 tulosta hakusanalla Constant Winnerman

Decision Directed and Constant Modulus Algorithms Derived and Evaluated for Multicarrier Systems

Decision Directed and Constant Modulus Algorithms Derived and Evaluated for Multicarrier Systems

Nicholas L. Linnenkamp

BiblioScholar
2012
nidottu
The purpose of this research is to derive and examine blind adaptive algorithms for equalizing multicarrier (MC) communication systems and analyze how they performunder varying environmental conditions and parametric variations, focusing on equalizersset in cascade with the channel. Two well-accepted and widely-known cost functions, Decision Directed (DD) and Constant Modulus (CM), are applied to the MC signalstructure, and gradient descent algorithms based on both DD and CM functions arederived, analyzed and compared. Comparison of the new algorithms, Multi CarrierDecision Directed (MCDD) and Multi Carrier Constant Modulus (MCCM), focuses ondetailing how each algorithm performs when the factors of noise power and symbolsynchronization are varied. Additionally, a Frequency Domain Equalizer (FEQ) isdeveloped and employed to de-rotate and resize the output symbol constellation. BothMCDD and MCCM are compared against other blind and trained adaptive MCequalization algorithms in the areas of bit error rate (BER) vs. signal to noise ratio (SNR)and BER vs. synchronization delay. Results are presented showing that MCDD andMCCM perform worse than a MC Trained (MCT) approach but better than bothMulticarrier Equalization by Restoration of Redundancy (MERRY) and Carrier NullingAlgorithm (CNA). This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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The Only Constant

The Only Constant

Najwa Zebian

Hodder Stoughton
2024
sidottu
Most people want something in their life to change, whether it's their job, their personal relationships, or their ability to live authentically. And sometimes, unwanted change comes all too swiftly. In The Only Constant, celebrated poet and educator Najwa Zebian guides her reader through the changes we must make (or those we need to endure) on the journey to our most authentic lives. She quiets the noise, teaches us to accept ourselves as we are now, and focuses on the necessity and beauty of those messy transitional times.This is a profound guide to embracing the impermanence, and celebrating the fact that change is what puts the life in life. Written with poetic wisdom, Najwa shares her personal experiences with change (for example, rejecting her culture's definition of what constitutes a "good woman" so that she could live more honestly). She guides us through the changes we choose, like embarking on a new career or setting boundaries, and changes we don't choose, like the loss of a loved one, a relationship, or a job.Ultimately, Zebian teaches that the purpose of change is to step into the world as your most authentic self. A highly practical guide to unfamiliar terrain, The Only Constant is here to assure us that uncertainty is natural. Yes, change is scary. But it's the path to living as your true self.
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The Gravitational Constant: Generalized Gravitational Theories and Experiments

The Gravitational Constant: Generalized Gravitational Theories and Experiments

Springer-Verlag New York Inc.
2004
sidottu
An up-to-date description of progress and current problems with the gravitational constant, both in terms of generalized gravitational theories and experiments either in the laboratory, using Casimir force measurements, or in space at solar system distances and in cosmological observations. Contributions cover different aspects of the state and prediction of unified theories of the physical interactions including gravitation as a cardinal link, the role of experimental gravitation and observational cosmology in discriminating between them, the problem of the precise measurement and stability of fundamental physical constants in space and time, and the gravitational constant in particular. Recent advances discussed include unified and scalar-tensor theories, theories in diverse dimensions and their observational windows, gravitational experiments in space, rotational and torsional effects in gravity, basic problems in cosmology, early universe as an arena for testing unified models, and big bang nucleosynthesis.
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The Gravitational Constant: Generalized Gravitational Theories and Experiments

The Gravitational Constant: Generalized Gravitational Theories and Experiments

Springer-Verlag New York Inc.
2004
nidottu
An up-to-date description of progress and current problems with the gravitational constant, both in terms of generalized gravitational theories and experiments either in the laboratory, using Casimir force measurements, or in space at solar system distances and in cosmological observations. Contributions cover different aspects of the state and prediction of unified theories of the physical interactions including gravitation as a cardinal link, the role of experimental gravitation and observational cosmology in discriminating between them, the problem of the precise measurement and stability of fundamental physical constants in space and time, and the gravitational constant in particular. Recent advances discussed include unified and scalar-tensor theories, theories in diverse dimensions and their observational windows, gravitational experiments in space, rotational and torsional effects in gravity, basic problems in cosmology, early universe as an arena for testing unified models, and big bang nucleosynthesis.
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True and Constant Friends

True and Constant Friends

Kelley Paul; Rand Paul

Center Street
2015
sidottu
Kelley Paul, wife of Senator Rand Paul, celebrates lifelong friendships in a beautifully illustrated book about the female bond. When Kelley Paul arrived on the Rhodes College campus in 1981, she immediately bonded with six women. Three decades of intimate friendship later, Kelley celebrates these relationships and the women who inspired them all. The extraordinary lives of Kelley's and her friends' role models--from the Southern matriarch to the poor Irish immigrant--are chronicled in this lovely book which offers oral history along with classic poetry, art, and photography. Throughout, Kelley explores the universal themes of hardship, determination, commitment, family, independence, optimism, friendship and love--and illuminates the power of the female bond that enriches all our lives.
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The Effects of Constant Light on Visual Processes

The Effects of Constant Light on Visual Processes

Springer-Verlag New York Inc.
2012
nidottu
" ... And the evening and the morning were the third day ... And God made two great lights; the greater light to rule the day and the lesser light to rule the night ... And the evening and the morning were the fourth day." The First Book of Moses, called Genesis (1: 13,16,19). There was daytime and nighttime before there was a sun or a moon. An interesting thought: How long were each of those first three days? Without a sun to reckon its length, a day could have been longer or shorter than 24 hours. Animals, says Genesis, appeared on the fifth day and by that time the sun and moon were illuminating the earth, presumably in cyclic fashion and with a period of 24 hours. A good thing, too, as readers of this monograph will as­ certain. The papers collected into this volume are written versions of 45 minute talks given at a symposium on "The Effects of Constant Light on Visual Processes", held at The Florida State University in Tallahassee on April 25-27, 1979. The conference was supported by the Psychobiology Program and handled, logistically, by the Center for Professional Development and Public Services. It was recognized that limitations on time and funds made prohibitive the invitation of others who may be doing interesting and related work. But, our earnest hope is that what is compiled here is a good blend of "true" light-damage and "relevant related" work.
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Spaces of Constant Curvature

Spaces of Constant Curvature

Joseph A. Wolf

AMERICAN MATHEMATICAL SOCIETY
2011
nidottu
This book is the sixth edition of the classic Spaces of Constant Curvature, first published in 1967, with the previous (fifth) edition published in 1984. It illustrates the high degree of interplay between group theory and geometry. The reader will benefit from the very concise treatments of riemannian and pseudo-riemannian manifolds and their curvatures, of the representation theory of finite groups, and of indications of recent progress in discrete subgroups of Lie groups.Part I is a brief introduction to differentiable manifolds, covering spaces, and riemannian and pseudo-riemannian geometry. It also contains a certain amount of introductory material on symmetry groups and space forms, indicating the direction of the later chapters. Part II is an updated treatment of euclidean space form. Part III is Wolf's classic solution to the Clifford-Klein Spherical Space Form Problem. It starts with an exposition of the representation theory of finite groups. Part IV introduces riemannian symmetric spaces and extends considerations of spherical space forms to space forms of riemannian symmetric spaces. Finally, Part V examines space form problems on pseudo-riemannian symmetric spaces. At the end of Chapter 12 there is a new appendix describing some of the recent work on discrete subgroups of Lie groups with application to space forms of pseudo-riemannian symmetric spaces. Additional references have been added to this sixth edition as well.
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