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Interfacing SAW resonators for wireless high temperature applications

Sensors and Transducers 2011年第7期130卷 11-22页

作者： Sarraf, Mohammad Javadian Hamidon, M.N. Isa, Maryam Mohd Ismail, Alyani Zarabi, Amir Reza Electrical and Electronic Engineering University Putra Malaysia Malaysia Communication Engineering Islamic Azad University of Mashhad Iran Sensor Technology Laboratory Institute of Advanced Technology Iran Computer and Communication Systems University Putra Malaysia Malaysia

In the recent year, wireless sensor has become the interest of research due to their ability to monitor remotely especially in harsh condition. Here a double surface acoustic wave (SAW) resonator system for wireless high temperature sensor application is discussed. The system also did not need any external power source to function, which made them as a passive system. In this paper, the principle of the system is discussed in detail together with simulation results. Finally, the suitable materials used to develop the system which includes the interconnection at the high temperatures are also been discussed. © 2011 IFSA.

关键词： High temperature applications

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Novel optical sensor based on the silicon crossing-coupled microring resonator

Novel optical sensor based on the silicon crossing-coupled m...

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IEEE International Conference on Group IV Photonics

作者： Huaxiang Yi Qifeng Long Xingjun Wang Zhiping Zhou State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta USA

A fabrication friendly crossing-coupled microring resonator was utilized to construct a compact and robust optical sensor which demonstrated a high sensitivity of 225nm/RIU experimentally.

关键词： Optical waveguides Optical sensors Optical resonators Optical device fabrication Optical reflection Optical scattering Couplings

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Polite water-filling for the boundary of the capacity/achievable regions of MIMO MAC/BC/interference networks

Polite water-filling for the boundary of the capacity/achiev...

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IEEE International Symposium on Information Theory

作者： An Liu Youjian Liu Haige Xiang Wu Luo State Key Laboratory of Advanced Optical Communication Systems & Networks School of EECS Peking University China Department of Electrical and Computer Engineering University of Colorado Boulder USA

We found a network version of water-filling, named polite water-filling, that is optimal for all boundary points of the capacity regions of MAC and BC and for all boundary points of a set of achievable regions of a general class of interference networks, named MIMO B-MAC networks that include BC, MAC, interference channels, X networks, and most practical networks as special cases. It is polite because it strikes an optimal balance between reducing interference to others and maximizing a link's own rate. Unlike in single-user MIMO channels, where the optimal input covariance can be solved by the water-filling, the traditional water-filling is far from optimal in networks. Thus, general purpose optimization algorithms have been used for networks but have high complexity and do not work well for non-convex cases. Together with our duality result, the polite water-filling can be used to design highly efficient low-complexity iterative centralized/distributed algorithms for the optimization of input covariance matrices, including both power and beamforming matrices, because it takes the advantage of the structure of the problems. References to the resulting algorithms that outperform the state-of-the-art by a wide margin are provided.

关键词： Covariance matrix Interference Optimization MIMO Receivers Algorithm design and analysis Optical transmitters

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Ultra-broadband supercontinuum generation using low-cost multimode pumped lasers and highly nonlinear fiber

Ultra-broadband supercontinuum generation using low-cost mul...

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ICO International Conference on Information Photonics (IP)

作者： Luo Ma Zhenguo Lu Bouchaib Hraimel Jiaren Liu Xiupu Zhang Institute for Microstructural Science National Research Council Ottawa ONT Canada Advanced Photonic Systems Laboratory Department of Electrical and Computer Engineering Concordia University Montreal QUE Canada

We experimentally demonstrated an ultra-broadband supercontinuum source by using two low-cost multimode lasers, Erbium-Yerbium co-doped fiber and highly nonlinear fiber. The bandwidth of the generated broadband source... 详细信息

关键词： Pump lasers Optical fibers Optical pumping Fiber nonlinear optics

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Imperfection Elimination in the Post Processing of True Random Number Generator

Imperfection Elimination in the Post Processing of True Rand...

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全国光电子与量子电子学技术大会

作者：朱洺祎刘钰张建玮郭弘 State Key Laboratory of Advanced Optical Communication Systems and Networks and Institute of Quantum Electronics School of Electronics Engineering and Computer SciencePeking University School of Physics Peking University

We propose a novel way to eliminate the imperfection induced by the noise of experimental equipments and environment in a physical realization of true random number *** operating such post processing on the data,the autocorrelation coefficient and bias contained in the original data are successfully *** entropy of our random sequence is also approaching to the ideal limit and we finally obtain a 150G bps generation rate of random bits.

关键词： Imperfection Elimination in the Post Processing of True Random Number Generator

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Degree of polarization of Mie scattered stationary partially coherent electromagnetic fields

Degree of polarization of Mie scattered stationary partially...

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International Conference on Quantum Electronics (IQEC)

作者： Madara L. Marasinghe Malin Premaratne David M. Paganin Advanced Computing and Simulation Laboratory (AL) Department of Electrical and Computer Systems Engineering Faculty of Engineering Monash University Clayton VIC Australia School of Physics Faculty of Science Monash University Clayton VIC Australia

The polarization of non-paraxial partially coherent light scattered from nanospheres cannot be described easily. We utilize the degree of polarization to quantify Mie scattered partially coherent light and demonstrate... 详细信息

ISBN: (纸本)9780977565771

关键词： Polarization Lattices Electromagnetic fields Optics Coherence Dielectrics

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Trust integrated link state routing protocol for Wireless Sensor Networks (TILSRP)

Trust integrated link state routing protocol for Wireless Se...

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International Symposium on advanced Networks and Telecommunication systems (ANTS)

作者： Arnab Raha Shaik Sahil Babu Mrinal Kanti Naskar Omar Alfandi Dieter Hogrefe Department of Electronics and Telecommunication Engineering Advanced Digital and Embedded Systems Laboratory Jadavpur University Kolkata India Institute of Computer Science Sensor Laboratory Telematics Group Georg-August-Universität Göttingen Gottingen Germany

Several methods exist for the assignment of trust to the nodes present in a Wireless Sensor Network (WSN). In this paper we develop a new algorithm for calculation of trust of individual nodes using both Direct and Indirect Trusts and thereby use the calculated trusts for determination of the different route trusts (RTs) to the Base Station. We present a link state routing protocol based on trust which protects the WSN against routing attacks by eliminating the un-trusted nodes beforehand. It then forms the routes and finds the best trustworthy route among them by comparing the values of all the calculated route trusts as for each and every route present in the network. This paper also shows the advantage of inclusion of Indirect Trusts in addition to the Direct Trusts. Finally, we compare our work with the most prevalent routing protocols and show its benefits over them.

关键词： Routing Routing protocols Wireless sensor networks Measurement Reliability Mathematical model

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Polite water-filling for weighted sum-rate maximization in MIMO B-MAC networks under multiple linear constraints

Polite water-filling for weighted sum-rate maximization in M...

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IEEE International Symposium on Information Theory

作者： An Liu Youjian Liu Vincent K. N. Lau Haige Xiang Wu Luo State Key Laboratory of Advanced Optical Communication Systems & Networks School of EECS Peking University China Department of Electrical and Computer Engineering University of Colorado Boulder USA Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong China

ISBN: (纸本)9781457705960

The algorithms in this paper exploit optimal input structure in interference networks and is a major advance from the state-of-the-art. Optimization under multiple linear constraints is important for interference networks with individual power constraints, per-antenna power constraints, and/or interference constraints as in cognitive radios. While for single-user MIMO channel transmitter optimization, no one uses general purpose optimization algorithms such as steepest ascent because water-filling is optimal and much simpler, this is not true for MIMO multiaccess channels (MAC), broadcast channels (BC), and the non-convex optimization of interference networks because the traditional water-filling is far from optimal for networks. We recently found the right form of water-filling, polite water-filling, for some capacity/achievable regions of the general MIMO interference networks, named B-MAC networks, which include BC, MAC, interference channels, X networks, and most practical wireless networks as special cases. In this paper, we use weighted sum-rate maximization under multiple linear constraints in interference tree networks, a natural extension of MAC and BC, as an example to show how to design highly efficiency and low complexity algorithms. Several times faster convergence speed and orders of magnitude higher accuracy than the state-of-the-art are demonstrated by numerical examples.

关键词： Interference MIMO Covariance matrix Optimization Complexity theory Receivers Algorithm design and analysis

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A novel line section protection for the FREEDM system based on the solid state transformer

A novel line section protection for the FREEDM system based ...

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IEEE General Meeting Power& Energy Society

作者： P. Tatcho Y. Jiang H. Li Electrical and Computer engineering Department Center for Advanced Power Systems Florida State University Tallahassee FL USA State key laboratory of power transmission equipment and new technology Chongqing University Chongqing China

The conventional protection scheme, including sequential components and wide differential area protection, may not be suitable for the FREEDM system mostly because of the unique characteristics of this new system. In this paper, the characteristics of FREEDM system are analyzed and a novel protection strategy, which makes full use of the system characteristics, is presented. This protection scheme makes use not only of the system configuration but mostly of the solid state transformer capability and design, to minimize the protection configuration and communication that are needed for a successful protection strategy. A Real Time Digital Simulator (RTDS) is used to model a sample FREEDM system in order to verify the proposed protection scheme. Simulation results are presented to support the proposed idea.

关键词： Voltage measurement Current measurement Transmission line measurements Load modeling Substations Fault currents Solids

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Evolutionary channel state information feedback control for interference alignment

Evolutionary channel state information feedback control for ...

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Asilomar Conference on Signals, systems & computers

作者： Lingyang Song Zhu Han Shaohui Sun Bingli Jiao The State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing China Electrical and Computer Engineering Department University of Houston Houston USA Datang Wireless Mobile Innovation Center China Academy of Telecommunication and Technology Beijing China

ISBN: (纸本)9781467303217

Interference alignment (IA) has been well recognized as a promising technique to obtain a large multiplexing gain in multiple input multiple output (MIMO) interference channels. However, most of the existing IA schemes require global channel state information (CSI) at the transmitter to design precoding vectors, which causes a large amount of feedback bits. To reduce the feedback overhead, in this paper, we model the evolution and dynamic behavior of the CSI feedback rate control problem using the evolutionary game theory over orthogonal feedback channels with a total bandwidth constraint. The game utility is defined as the performance gain by CSI feedback minus the price as a linear function of the CSI feedback rate, subject to an overall bandwidth constraint. Then, an algorithm for the implementation of the evolution process is also presented. The proposed game-theoretic framework for modeling the interactions among the feedback of multiple users can be used to efficiently control the CSI feedback amount while achieving fairness among all the mobile receivers.

关键词： Receivers Interference Vectors Games Mobile communication Transmitters Bandwidth

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