The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The following topics are dealt with: computer engineering and systems; computer architecture; computer aided design; control systems; embedded systems; hardware-software codesign; computer networks and security; signal processing; multimedia; Web applications; mobile and ubiquitous computing; artificial intelligence; evolutionary computing; database and data mining
The use of advanced signal processing approaches for improving the performance of secure wireless communication systems utilizing Smart Antennas and Spread Spectrum (SS) signaling is overviewed in this paper,. Emphasis is placed on research results obtained by the author and his research group in the last decade. Using advanced signal processing is shown to highly improve the performance of Smart...
Because of low-cost optical devices and virtually unlimited bandwidth, optical wireless communications (OWC) for indoor wireless local area networks (WLANs) has become an attractive alternative to radio frequency systems. Since optical signals cannot penetrate through walls or other opaque barriers, the security of infrared WLANs is very high and there is no interference between rooms. This makes...
The aim of this tutorial is to introduce the field of quantum computation and communication. Evolution of quantum computation starting from the Quantum Turing Machine model will be briefly given. Then the circuit model using quantum gates is presented together with representative quantum algorithms that are executed more efficiently on a quantum computer. The recent quantum cluster-state model is...
Neighboring line switching can contribute to a large portion of the delay of a line for today's deep sub micron designs. A hierarchical design is unavoidable because of a huge circuit size. It is more important how we can consider hierarchically meaningful structure in circuit delay analysis. To improve accuracy of hierarchical timing analysis, in this paper we inject the notions of local false coupling...
This paper presents an approach to use the partition of unity technique associated with the radial basis technique to provide implicit surface reconstruction over a distributed environment. The proposed algorithm acquires all the advantages of the partition of unity with better performance and capability of reconstructing surfaces from larger data sets. The global large implicit surface reconstruction...
A low-power quadrature direct digital frequency synthesizer (DDFS) is presented. Such system is based on a classical DDFS structure. In order to avoid the high power consumption, no ROM is used but piecewise linear approximation is employed. The system is implemented using FPGA with 3.3 V supply voltage. The power consumption is 3.96 mW. The spurious-free dynamic range is better than 59 dBc at low...
Synchronous finite state machines are very important for digital sequential designs. They allow the synchronisation of the hardware system components so that these may cooperate adequately in the fulfillment of the main objective of the design. In this paper, assuming that the state assignment problem has been solved and so a specific state coding is provided, we propose to me the evolutionary methodology...
This paper presents a fuzzy basis function approach for adaptive decentralized control of a class of large-scale nonlinear systems with MIMO subsystems. Hybrid adaptive-robust tracking control schemes which are based on a combination of the HT tracking theory, and fuzzy control design are developed such that all the states and signals are bounded and the HT tracking control performance is guaranteed...
Adaptive fuzzy controllers are potential candidates for controlling robot arms. However, traditional fuzzy controllers suffer from the rule explosion phenomenon. We propose here a hierarchical scheme to implement the fuzzy system and consequently relax the rule explosion problem. Furthermore, since payloads are normally varying, robotic models are uncertain. We propose a fuzzy-logic based dynamic...
Coordinated control scheme for generator excitation and static VAR compensator (SVC) using an indirect adaptive fuzzy logic control (IAFLC) of multi-machine power systems based on multi-input-multi-output feedback linearization technique is developed in this paper. The power system considered in this paper consists of two generators and infinite bus connected through a network of transformers and...
This paper extends the results of discrete-time averaging method presented before to include the effect of feedback loop in the PWM system. This model provides the exact one cycle average values of the output signal with the presence of feedback even at low switching frequency. A comparison of this model to other existing models is presented through a numerical example of boost converter. Simulation...
The recent emergence of component-based designs helps the design of systems daring the refinement step between algorithmic specifications and architecture specifications. Designers' attempts such as flexibility, cost constraints, high performance and time to market can thus be helpfully managed. However, the correct integration of the architectures/components in a design implies complex verification/design...
More and more microcontrollers are embedded in a large area of products from industrial to domestic domains. A good example is the automobile, a modern one containing tens of microcontrollers. As their number increased the communication between them became necessary. The serial solution was preferred and a lot of serial buses and protocols were developed optimizing different parameters of the communication...
Network-on-chip (NoC) is being proposed as a scalable and reusable communication platform for future SoC applications. An important problem In NoC design is deciding the type of routing which is one of the most crucial key factors that greatly affects the NoC architecture based systems performance. Currently, most of the proposals for routing In NoC are based upon deterministic routing mechanism because...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.