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FPGA architects typically use experimental techniques to design new architectures. These techniques are time consuming, thus limiting the number of the architectures that can be investigated. Some previous works use analytical models to significantly accelerate the design of a new architecture. To properly capitalize on the benefits of the analytical models, the designers need to have an understanding...
In a time invariant system with finite events, the possible scenarios are defined by the events and the relative delay between the events. System behavior testing with overlapping events requires all non-redundant scenarios to be generated and utilized for testing. In this work, non-redundant set of scenarios are derived for a symmetric system. A method for generating the scenarios efficiently with...
In recent years, multimedia network services have moved from a single service to rich services which integrate multiservice capabilities integration. If all service requests require the user to send the request by himself, this will result to a huge control function load and complex service collaboration. In order to address service interaction and reuse the service capability, 3GPP proposes a Service...
The key focus of our work is to analyse some jitter control algorithms. We study a jitter control algorithm proposed by Mansour et. al [1] for networks with guaranteed quality of service (QoS) from a competitive analysis point of view. The authors have analysed the proposed algorithm (on-line algorithm) and also compared its performance to the off-line algorithm. In this paper, the analysis of the...
In this article, Very Crucial subject discussed in RFID TAG's stability. RFID Equivalent circuits of a Label can be represent as Parallel circuit of Capacitance (Cpl), Resistance (Rpl), and Inductance (Lpc). We define V(t) as the voltage which developed on the RFID Label and dV(t)/dt is the voltage time derivative. Due to electromagnetic interferences there are different time delays respect to RFID...
In this article, Very Crucial subject discussed is Microstrip transmission lines with power limiters, stability analysis under time delayed. Many receivers are often at risk of having their front end burned out by high power RF. Receivers are traditionally protected by a power limiter circuit. The limiter diode is a special type of PIN diode. Due to parasitic effects of microstrip transmission lines...
The paper analyzed the current congestion control problems, proposed a new method about estimating the maximum drop probability of Random Early Detection (RED). The paper also gives the application method of the improved RED algorithm. Finally, the paper verified the correctness and validity of the method.
This paper introduces a new LQ optimal, infinite horizon output tracking solution. It publishes results from problem formulation to real flight tests. After a short literature review, it rigorously derives the problem solution and states all of the properties of this new control method. Then it introduces the lateral-directional aircraft model on which the algorithm was tuned and tested. The LQ optimal...
Synthesis of quasi-orthogonal ternary sequences (QOTS) with the specified period and peak-factor values on the basis of power residue classes over GF (p) is presented. The distinctive features of the suggested methodology are: • synthesis is performed by a directed search considering necessary existence conditions of QOTS with the defined parameters; • high-speed performance of the synthesis algorithm...
Multiuser dynamic OFDMA based IEEE 802.11 distributed coordination function (DCF) has received significant interest from the researchers in recent time. Though several proposals have been made, to the best of our knowledge, none of these have presented an analytical model for this kind of medium access control protocols for IEEE 802.11. This paper provides a simple, nevertheless, very accurate analytical...
This work considers the stabilization problem of a class of unstable first order linear systems with time delay. A methodology is proposed to tune a proportional-derivative (PD) controller. Necessary and sufficient conditions are stated in order to guarantee the stability of the delayed closed loop system. The main motivation for studying this problem arises when checking for systems with a considerable...
In this work we adopt an OFDMA like Multi-Carrier scheme for wireless sensor networks with the aim of improving the performance in the presence of intensive traffic load. To examine the MAC performance, a simple, yet accurate analytic model has been provided, validated by simulation results. We demonstrate that the proposed scheme can achieve better throughput under heavy offered traffic load, as...
VHF radio systems commonly used to support search and rescue activities after disasters limit the flow of information among response teams deployed in the field. It generates islands of information that jeopardizes the coordination and effectiveness of the response activities. This article proposes a communication model that uses opportunistic networks and real-time messages delivery to help address...
Due to limited storage capacity in the DTN nodes, storage congestion occurs when too many bundles are contending for this scarce resource. As a result, bundle loss increases and the delivery ratio of the network suffers. In a proactive scheme, a node can decide whether to accept or reject the custody of a new bundle based on its current storage status. In this paper, we propose a novel proactive congestion...
Several microphone arrays, such as planar four-element array, symmetric three-dimensional square array, planar five-element cross array are common single arrays, which to be used in passive acoustic location with a relatively high frequency. In different articles, an array may be placed in a different way, for example, turned the array at an angle along the z-axis (e.g.90¡ã). The relationship between...
In this paper, we propose a general model for the broadcast polling protocol of unsaturated IEEE 802.16 networks in which each subscriber station has a finite buffer. A subscriber station can be modelled as a M/G/1/K queue with its service time determined by the broadcast polling protocol. The buffer overflow probability, network throughput and packet delay performances are analyzed. The proposed...
The numerical solution of optimal control problems is important in a variety of industries. One of the popular methods for complex problems is direct transcription. Direct transcription does not rely on the necessary conditions and it is easy to incorporate a wide variety of constraints on both controls and states. Optimal control problems can often involve delays in the state or the control or both...
Wireless sensor networks (WSN) are a kind of networks made up of thousands of tiny nodes. The node in WSN has limited computing, caching and communicating ability. Because of these differences from normal lineal networks, there are many research hotpots for quality of service (QoS) in WSN. The target of most WSN is to detect events and it pays more attention to the QoS of colony data packets. So,...
Considering the chaotic characteristics of ship rolling time series, the new real-time forecasting method is proposed to further enhance accuracy and real-time of the prediction model based on support vector machines in the prediction of ship rolling motion, which utilizes phase space reconstruction theory of chaotic systems and online LSSVM. Delay time and delay time window are estimated by C-C method,...
This paper investigates the state feedback stabilization of linear time-invariant (LTI) systems with input time delay. By investigating the real part and the imaginary part of the transcendental equation, the characteristic equation can be transformed into an equation with two bivectors related to the system parameters and the feedback gain. Using the bivector rotation principle, the characteristic...
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