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The plug-in of nodes in already synchronized Wireless Sensor Network (WSN) can perturb the synchronization accuracy. In the case of the plug-in of one node, the consensus based synchronization algorithm permits to deploy the local interactions among nodes, and, as a consequence, to detect and ignore the Non Synchronized Node (NSN). In the case of multiple nodes, the detection of NSNs can be misstated...
The steadily increasing complexity of integrated circuits raises the burden on verification engineers of sophisticated System on Chips (SoCs). Simulations and formal verification alone are not able to detect all problems in a design due to unforeseen interactions between modules. These problems may occur even if the modules are logically independent from each other due to physical effects. Bugs found...
Distributed Phasor Measurement Unit (PMU) is a performing solution to measure synchrophasors in an IEC 61850 compliant scenario. The standard IEEE C37.118.2-2011, about data transfer of synchrophasor measurements, requires to give time quality information along with time stamped measurement data. In a distributed PMU, the time quality of the system depends on the capabilities of the Merging Unit (MU)...
In this paper we investigate defects in photovoltaic modules which cause variations in output performances. Here, we concentrate on two possible ways to verify potential output power levels. Firstly, we characterise the output behaviour by measuring the amount of current at different voltage levels to obtain the I–V (Current-Voltage) and P-V (Power-Voltage) curves. Secondly, we measured the infrared...
To control and preventing volcanic risk, are used different devices where many parameters are monitored that provide insight into the state of a volcano. This paper presents the design of system for monitoring the volcano seismicity. This system is composed of the module of acquisition data, the power module, the peripherals for communicate remotely and GPS to get time synchronization. This system...
As new application areas like SmartGrids and 4G cellular mobile backhaul networks emerge, requirements on precision of the frequency and time synchronization increase. IEEE 1588v2 Precision Time Protocol (PTP) offers sub-microsecond synchronization precision using conventional Ethernet networks. In practical network scenarios the PTP performance is greatly reduced due to varying queuing latencies...
The necessity of the same signal for measurement and reconstruction of sparse signals in Compressed Sensing is one of the challenges in its practical implementation. In this paper, we extend the Random Modulator Pre-Integrator (RMPI), architecture proposed to signal acquisition in Compressed Sensing, by including a synchronization signal that permits to obtain the same measurement signal from a Pseudo...
Phase difference measurement of interfering radio signals is an essential part of radio-interferometric positioning applications. In this paper a novel phase measurement system is proposed, which is able to accurately measure the phase difference of the received radio signals, even in the presence of significant measurement noise. The suggested measurement system can be operated on inexpensive elements...
This paper proposes the use of Synchronous Ethernet in networks with multiple paths for the synthesis of a precise frequency reference for distributed measurement systems. The paper presents novel approach based on a Kalman filter with outlier identification and removal followed by a linear quadratic regulator (LQR). The algorithm, to be implemented within a network element, is able to synthetize...
During the last decades, networks have evolved from stateless copper wires to complex, stateful communication paths. Furthermore, the delay in wired and wireless access networks has decreased substantially, such that previously negligible delay contributions become relevant parts of the total end-to-end delay. This can affect critical M2M applications such as Smart Grid communication that depend on...
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