Search 250 million research papers

Synchronization

Ryszard Praszkier · 2022

Cited by 0

Synchronization

Takashi Yamamoto, Toshiki Oguchi, Henk Nijmeijer · 2014

Cited by 0

Synchronization

Albert Díaz-Guilera; Departament de Fisica de la Matèria Condensada, Universitat de Barcelona, Barcelona, Catalonia. Universitat de Barcelona Institute of Complex Systems (UBICS), Universitat de Barcelona, Barcelona, Catalonia, Conrad J. Pérez-Vicente; Departament de Fisica de la Matèria Condensada, Universitat de Barcelona, Barcelona, Catalonia. Universitat de Barcelona Institute of Complex Systems (UBICS), Universitat de Barcelona, Barcelona, Catalonia · Estudis Romànics (Institut d'Estudis Catalans) · 2016

In this paper we analyze the dynamics of two different models of oscillators.The most relevant aspect of both models is that synchronization emerges spontaneously as a natural stationary state and therefore may be a starting point for understanding complex patterns where exact timing plays a relevant role.However, the physical mechanisms leading to this temporal coherence are quite different in the two models, evidence of the richness of dynamic behavior in real systems.We are still far from a complete understanding of the whole process.The effect of the topology on the dynamics, the effect of mobility, the effect of disorder, etc., are all very important in biological, physical, and social environments and are the current focus of research in the field.

Cited by 0Open access

Synchronization

R Vali, Stevan Berber, Sing Nguang · ResearchSpace (University of Auckland) · 2010

Cited by 0

SYNCHRONIZATION

2019

This chapter is concerned with the radio frequency and demodulation blocks at the receiver. It covers some issues one needs to consider when designing a successful synchronization scheme for a communications system. The task of synchronization can be broken into two parts. One is to estimate the current timing errors. The other is correcting such errors by manipulating captured signal or the system clocks. Such conceptual separation is helpful, although these two tasks are often closely related in practice. The chapter discusses these parts of synchronization. It also discusses the initial acquisition, namely, to obtain timing alignment without any prior timing knowledge and with a large initial error. The chapter describes practical methods for initial synchronization. The methods rely on known symbols at the beginning of a frame (i.e., data-aided method). These known symbols are referred to as preambles or training symbols.

Cited by 0

Synchronization

Basab Bijoy Purkayastha, Kandarpa Kumar Sarma · Signals and communication technology · 2015

Cited by 1

Synchronization

Gérald Belpaire · 1975

Cited by 0

Synchronization

A. Pietiläinen, Juha Salmelin · 2012

In cellular networks the frequency accuracy requirement is clearly higher than needed for eliminating interference between neighbouring radio bands. The user equipment (UE) measures the reception of neighbouring base stations in preparation of a possible handover from one base station to another. There are three TDM (time-division multiplexing) technologies currently in use, PDH (Plesiochronous Digital Hierarchy), SDH (Synchronous Digital Hierarchy) or SONET (Synchronous Optical Network), which is the North-American equivalent of SDH, and OTN (Optical Transport Network). Ethernet has been designed as a low-cost plug and play technology. Combined with IP friendly adaptation to higher layers, Ethernet has become the dominant link layer and physical layer technology in packet networks. This chapter explains the principle of packet synchronization and discusses the scheme to overcome the accuracy problem. The most widely deployed time synchronized system is CDMA used by several hundred million subscribers around the world. Controlled Vocabulary Terms Ethernet networks; multiaccess communication; packet radio networks; SONET

Cited by 0

Synchronization

2014

errors can lead to significant performance loss in image watermarking methods, as the geometric attacks in the Stirmark benchmark software show. The authors describe the most common types of geometric attacks and survey proposed solutions. A

Cited by 0

Synchronization

Helmut Jürgensen · Information and Computation · 2008

Cited by 21

Synchronization

Peter E. Kloeden, Martin Rasmussen · Mathematical surveys and monographs · 2011

Cited by 0

Synchronization

Petr Kamenicky, Geert V · 2012

Cited by 0

Synchronization

Gleb Krylov, Tahereh Jabbari, Eby G. Friedman · 2023

Cited by 0

Synchronization

Stefano Boccaletti, Alexander N. Pisarchik, Charo I. del Genio et al. · Cambridge University Press eBooks · 2018

A modern introduction to synchronization phenomena, this text presents recent discoveries and the current state of research in the field, from low-dimensional systems to complex networks. The book describes some of the main mechanisms of collective behaviour in dynamical systems, including simple coupled systems, chaotic systems, and systems of infinite-dimension. After introducing the reader to the basic concepts of nonlinear dynamics, the book explores the main synchronized states of coupled systems and describes the influence of noise and the occurrence of synchronous motion in multistable and spatially-extended systems. Finally, the authors discuss the underlying principles of collective dynamics on complex networks, providing an understanding of how networked systems are able to function as a whole in order to process information, perform coordinated tasks, and respond collectively to external perturbations. The demonstrations, numerous illustrations and application examples will help advanced graduate students and researchers gain an organic and complete understanding of the subject.

Cited by 211

Synchronization

David Miles Huber, Robert E. Runstein · 2017

Cited by 0

Synchronization

Gabriele Manganaro, Paolo Arena, Luigi Fortuna · Springer series in advanced microelectronics · 1999

Cited by 0

Synchronization

Richard E. Blahut · Cambridge University Press eBooks · 2009

A channel may introduce unpredictable changes into the waveform passing through it. In a passband channel, such as a radio frequency channel, unpredictable phase shifts of the carrier may occur in the atmosphere, in antennas, and in other system elements or because of uncertainty in the time of propagation. In order to demodulate a digital waveform coherently, a coherent replica of the carrier is needed in the receiver. Because the receiver does not know the carrier phase independently of the received signal, the receiver must locally regenerate a coherent replica of the carrier. Uncertainty in the phase of the received waveform introduces the task of phase synchronization in the receiver.

Cited by 0

Synchronization

2013

So far, we have mainly studied synchronous algorithms. Generally, asynchronous algorithms are more difficult to obtain. Also it is substantially harder to reason about asynchronous algorithms than about synchronous ones. For instance, computing a BFS tree (Chapter 3) efficiently requires much more work in an asynchronous system. However, many real systems are not synchronous, and we therefore have to design asynchronous algorithms. In this chapter, we will look at general simulation techniques, called synchronizers, that allow running synchronous algorithms in asynchronous environments. 10.1 Basics A synchronizer generates sequences of clock pulses at each node of the network satisfying the condition given by the following definition. Definition 10.1 (valid clock pulse). We call a clock pulse generated at a node v valid if it is generated after v received all the messages of the synchronous algorithm sent to v by its neighbors in the previous pulses. Given a mechanism that generates the clock pulses, a synchronous algorithm

Cited by 0

Synchronization

Elettra Venosa, Fredric J. Harris, Francesco Palmieri · Analog circuits and signal processing/Analog circuits and signal processing series · 2011

Cited by 0

Synchronization

Haesik Kim · 2015

OFDM systems are very sensitive and vulnerable to synchronization errors. In this chapter, the authors look into synchronization errors and their effects, review synchronization techniques, and design ML synchronization block in the OFDM system. Synchronization techniques can be classified into data-aided methods, decision-directed methods, and non-data-aided methods. Many synchronization techniques are based on two important algorithms: autocorrelation and crosscorrelation. In OFDM systems, coarse timing synchronization and fine timing synchronization are usually based on autocorrelation and crosscorrelation, respectively. The purpose of the OFDM synchronization block is to detect an OFDM symbol, find the time and frequency offset, and maintain the orthogonality of each subcarrier. The chapter briefly investigates the hardware design issues of the OFDM synchronization. An OFDM synchronization block requires a real time implementation and a large size memory. The ASIC design would be the best solution.

Cited by 0