Temporal Imaging System with Simple External Clock Synchronization

2009 ◽  
Author(s):  
Daniel H. Broaddus ◽  
Mark A. Foster ◽  
Onur Kuzucu ◽  
Amy C. Turner-Foster ◽  
Michal Lipson ◽  
...  
Keyword(s):  
Imaging System ◽  
Clock Synchronization ◽  
External Clock Synchronization ◽  
External Clock

scholarly journals Improvement of Physical Clock Synchronization Algorithm by Two-Level Synchronization

2013 ◽  
Vol 11 (6) ◽  
pp. 2648-2652
Author(s):  
M. Praveen Kumar Reddy ◽  
K. Ashwin Kumar ◽  
S. Rajesh Kumar ◽  
RA.K. Saravanaguru
Keyword(s):  
Distributed Systems ◽  
Clock Synchronization ◽  
Clock Drift ◽  
Common Time ◽  
Synchronization Algorithm ◽  
External Clock Synchronization ◽  
The Common ◽  
External Clock

Synchronization of the clocks is one of the essential thing for many applications in distributed systems. Clock synchronization is very important because they improve the performance and reliability of distributed systems. The main purpose of clock synchronization algorithms is to provide the common time to essential parts of the distributed systems. In this paper the problem considered is synchronization of clock with bounded clock drift and proposing a two level synchronization algorithm which synchronizes the processors local clocks by combining both internal and external clock synchronization.

scholarly journals Temporal-imaging system with simple external-clock triggering

2010 ◽  
Vol 18 (13) ◽  
pp. 14262 ◽  
Author(s):  
Daniel H. Broaddus ◽  
Mark A. Foster ◽  
Onur Kuzucu ◽  
Amy C. Turner-Foster ◽  
Karl W. Koch ◽  
...  
Keyword(s):  
Imaging System ◽  
External Clock

A New Clock Synchronization Method for Multi-FPGA Systems

2011 ◽  
Vol 204-210 ◽  
pp. 907-910
Author(s):  
Cheng Chang Zhang ◽  
Li Sheng Yang ◽  
Xiao Ping Hu ◽  
Hong Yang ◽  
Ping Li
Keyword(s):  
Clock Synchronization ◽  
Clock Tree ◽  
Delay Locked Loop ◽  
Synchronization Method ◽  
System Clock ◽  
External Clock ◽  
Board Level ◽  
Synchronization Scheme

A novel clock synchronization scheme is proposed in this paper, which smartly takes the advantages of the inner delay-locked loop(DLL) to compensate for the delay generated by board-level feedback, combining with conventional external clock tree scheme to achieve the system clock synchronization.

Distributed Cooperative Synchronization for Large-Scale 4G Wireless Sensor Networks Using CAZAC Sequences

2012 ◽  
Vol 4 (1) ◽  
pp. 56-71 ◽  
Author(s):  
Mahdy Saedy ◽  
Brian Kelley
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Large Scale ◽  
Clock Synchronization ◽  
Propagation Delay ◽  
Data Consistency ◽  
Wireless Sensor ◽  
Scale Free ◽  
4G Wireless ◽  
External Clock

Clock synchronization is an important requirement of wireless sensor networks (WSNs). Synchronization is crucial to maintain data consistency, coordination, and perform fundamental operations. Many application scenarios exist where external clock synchronization may be required because WSN itself may not consist of an infrastructure for distributing the clock reference. In distributed systems the clock of a reference node is synchronized with GPS time tag or UTC as conventional external clock sources. The rest of the nodes estimate the offset and drift based on a synchronization protocol. For vast WSN, where the topology introduces propagation delay and fast drift rate of clock over sampling periods, synchronizing the WSN nodes and maintaining the synchronization is difficult. To maintain an accurate synchronization across the WSN, the authors propose a cooperative synchronization method, which uses Constant Amplitude Zero Auto Correlation (CAZAC) sequences for OFDM symbols. The proposed method is part of a class of distributed methods known as Gossip or Consensus. These protocols are robust and self-correcting to topology changes and link failure. In this paper, the authors introduce a specific type of power-law topology called scale-free and compare the synchronization performance of the proposed method in random and scale-free topologies.

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