Abstract:

After appearance of H.264/MPEG-4 Part10 standard, many efforts have continued on investigating on the potential of improvement of video efficiency. After the call for proposal released in January 2010, many coding tools have been proposed to contribute to the new video compression standard, the High Efficiency Video Coding (HEVC). From proposals, it appears that the HEVC is keeping the same hybrid coding diagram with intra/inter prediction, residual coding, DCT based transform, a de-blocking filter coupled with a novel adaptive filtering in addition to two schemes of entropy coding. We propose on this paper to explore the video coding tools advances and improvement efforts proposed so far for the HEVC standardization.

Abstract:

This paper presents an asymptotic analysis of Channel Division Multiple Access (ChDMA) which is defined as a promising multiple access scheme for MBOFDM in the presence of Ultra Wide Band high data rate channel (802.15.3a model) .In fact, The asymptotic analysis provide a good understanding of the ChDMA limiting behavior. This new multiple access schemas are based on the use of the Channel Impulse Responses (CIR) as user signatures. We characterize the spectral efficiency for the optimal receiver, the analysis is investigated assuming perfect CSI at the receiver .We derive the spectral efficiency when the number of frequency dimensions Also, we present an analysis of the impact of the power delay profile (PDP) on the spectral efficiency of MBOFDM-ChDMA-UWB system with a correlation between the delay and the energy of the paths. As a result we conclude that the spectral efficiency depends on the system load, the power delay profile and the noise variance.

Abstract:

In this paper we study the influence of meta-materials on the performances of an array of 2 × 4 micro-strip patch antenna operating at about 10 GHz. For this purpose, meta-materials are based on Artificial Magnetic Conductor (AMC) and on inductive and capacitive planar structures. These structures provide High Impedance Surfaces (HIS) and Partially Reflective Surfaces (PRS). Application of these structures allows improving the performance of antenna, increasing the gain, and offering a good directivity.

Abstract:

The use of rapid prototyping tools such as Simulink/Matlab and Xilinx System Generator becomes increasingly important because of time-to-market constraints. This paper presents a methodology for implementing real-time image and video processing applications on a reconfigurable logic platform using Xilinx System Generator (XSG) for Matlab. The methodology aims to improve the design verification efficiency of such complex system. The methodology steps will be demonstrated using an image and video compression algorithm built with Xilinx System Generator. The design was implemented targeting a Spartan3A DSP 3400A device.

Abstract:

This paper presents an interactive system for assist and helps the blind and visually impaired people transit. The work presented in this paper is the design and implementation of an electronic platform, based on the SDK STM32f4-Discovery, dedicated to the implementation of a communication system for the automatic identification of bus using RFID technology. Our goal is to develop passive RFID readers manufactured with materials that respect the environment and having a reduced size.

Abstract:

Digital Visual Interface (DVI) is gradually being applied to high quality and high resolution digital video signal transfer between graphic controller and digital display. There have been widespread applications of DVI interface. The valuable digital content, however, is vulnerable to unauthorized access during the transmission. This paper briefly explains the implementation of lifting wavelet algorithms on FPGA and makes a comparative study of their performance. The design utilizes powerful design tool System Generator (SysGen) and Embedded Development Kit (EDK) for hardware-software co-design and integrates the dwt2d codec hardware as a peripheral to the Microblaze 32 bit soft RISC processor with an input from a CMOS camera and output to a DVI display and verified the results video in real time. The proposed algorithm will be implemented in a real time embedded system using Xilinx Video Starter Kit Board- Spartan-3a DSP 3400A Edition.

Abstract:

In this paper we considered a recent work in which a sliding mode based secure communication system was proposed [14]. We have detailed the study and conducted a critical analysis of this case considering the implementation aspect using basic electronic components. Especially we analyzed the effect of some parameters mismatch such as electrical components, channel noise, frequency and amplitude of the message on synchronization between master and slave systems.

Abstract:

The work presented in this paper is related to knowledge management during the design process of mechanical products. More exactly, we are concentrating on the knowledge reuse process. We propose a knowledge reuse system (KRS) based on two approaches. Namely, an organizational approach and a modeling user approach. Both are ontology-based models. Our system takes into account, the actors’ roles (by the organizational approach), their preferences (by the model user approach), and their collaboration throughout the product design process in order to help designers to get knowledge that is considered the most relevant in all the phases of the product design process.

Abstract:

The work presented in this paper provides an approach for minimizing the time during the design project of mechanical products. This approach focuses on a process of knowledge capitalization for projects to develop, and also process knowledge reuse, which encourages us to take advantage of knowledge stored in the project memory to minimize design time and exploit knowledge commensurate with project design that travels the shortest minimum. This work is based on two aspects. The first aspect is developing an ontology devoted to the needs; the second is the integration of the organizational model in the ontology. Through this paper, we focus on providing assistance to businesses involved in design projects.

Abstract:

This work is related to the knowledge management all along mechanical design project. The aim of this research is to create a model of reusing knowledge. This model is based on a knowledge semantic search to consider the semantics of the query. Our modeling is built with the similarity measure and domain ontology, which represents the query and the knowledge by concepts belonging to the same space representation.

Abstract:

The paper presents an overview of the physical layer simulator “Link Level simulator”, which models all physical layer features depicted in the 3GPP standards; these include generation of transport blocks, turbo coding, rate matching, scrambling, and modulation. It allows for all investigation of channel estimation, prediction algorithms as well as Multiple input multiple output (MIMO) gain, adaptive modulation and coding (AMC) and feedback techniques.

Abstract:

The success of any telecommunication technology could not be ensured by a single company, interest and support from various other parties is crucial and required to achieve any objective. However, creativity is offered by research and brainstorming. Stakeholders in telecommunication domain may be system researchers, engineers, customers, integrators, etc. As a result, the amount of interest created in the telecommunication industry was seen as a measure of success that promotes technology via standards creation involvement and innovation. Standards involvement becomes critical since they are essential for interworking and interoperability across telecommunication systems. Based on data analysis, actual telecom standards creation was found to be a long drawn out process (that may generate drawbacks) which typically lasted for a long period. Its review and the integration of research into its development life cycle are highly recommended.

Abstract:

Pollution is one of the major issues affecting P2P file sharing networks and particularly the structured P2P networks. In this article, we firstly show the different types of P2P architectures. The Simulation results show the efficiency and the scalability of structured P2P networks. However, there is a possibility of pollution attack because of the absence of a centralized control system. Secondly, we introduce various kinds of existent pollutions and their negative impact on the users and the system. Finally, we identify and describe a number of anti-pollution mechanisms.

Abstract:

Since the beginning of study of the Secure Hash function (SHA), it has been thoroughly studied by designers with the goal of reducing the area, frequency, through put and power consumption of the hardware implementation of this cryptosystem. The Secure Hash function algorithm has become the default choice for security services in numerous applications. In this paper, we present the implementation details of the SHA-256. The number of occupied slices, the maximum working frequency (in megahertz), the throughput (in gigabits per second), and the efficiency (in gigabits per second/slice) have been compared. An FPGA architectural for SHA-256 was developed using VHDL, and synthesized using Virtix-5, Virtix-6 and Virtex-7 chips. SHA-256 show tremendous frequency increase of 50% when compared with the implementation of the original SHA -256.

Abstract:

Cognitive Radio and Dynamic Spectrum Access represent two complementary developments that will refashion the world of wireless communication. Our work consists on the development of a simulation environment in order to investigate the roles of knowledge representation and reasoning technologies in this domain. This technique uses the spectrum holes to ameliorate the communication of multicarrier (OFDM) based Cognitive Radio system. There are few simulation techniques present regarding cognitive radios, thus we intend to come out with a simpler and efficient simulating technique, in the OFDM context. The results in terms of Power Spectral Density (PSD) optimization are used to make decision in the Cognitive Radio domain.

Abstract:

Elliptic curve cryptosystems (ECC) and Hyper Elliptic curve cryptosystems (HECC) receives attention and much effort is being dedicated to make them more and more practical. However, elliptic and hyper-elliptic curves use a complex mathematical background so it's difficult to be implemented on hardware. In the presented paper, we will give two architectures for hyper-elliptic curves, first one use the cantor's algorithms and the second is based on explicit formulae. We will try to optimize the first architecture and a comparison between elliptic cryptosystem and hyper-elliptic cryptosystem concludes the paper. As a major finding we show that it is beneficial for certain curves to use Cantor’s algorithm to achieve higher speed compared to explicit formulae. Furthermore, we could show that HECC can reach the performance of ECC and, in some cases, even outperforms ECC.

Abstract:

Here we consider the lifting scheme based on Second Generation Wavelets (SGW), a novel mathematic transform, successfully applied in 3D coding. This powerful signal processing theory allows a very well adapted coding of high frequencies. Wavelets can be designed to fit exactly on singularities, shapes, textures and edges. Hence, they can reduce redundancy and improve considerably coding efficiency over those peculiar settings. In addition to that, motion-compensated lifting schemes have become a reference for the temporal filtering of video data. However, block-based motion estimation and compensation produce annoying blocking artifacts around the moving objects and near the borders of images. Our goals are optimization, FSM design and VHDL implementation of lifting scheme blocks on high level technologies (FPGA, ASIC, DSP...). This module can be applied on all classical applications, such as very low bit rate transmissions and video streaming. In this paper, we will explain second generation wavelets principles and we will detail the lifting scheme concept. Then we will give a brief outline on lifting scheme blocks. In addition to that we will demonstrate our FSM blocks design. We will finally explain their VHDL implementation.

Abstract:

In this paper, we present a comparison between range-based and fingerprinting techniques through an acoustic source localization system. The time of arrival of CDMA signal emitted by the localized speaker is deployed. The K-Nearest Neighbors (K-NN) and the K-Weighted Nearest Neighbors (WK-NN) algorithms are adopted for the fingerprinting technique while lateration is employed for range-based technique. Performance is evaluated by experiments conducted in a hall of interns in National School of engineers of Le Mans. Results have shown that lateration provides the best performance.

Abstract:

Wireless Sensor Networks (WSN) is impacted by many design engineering factors. In this paper, we handled the main routing constraints influencing WSN performance. First of all, we study a network partitioning algorithm that allows the splitting into several virtual zones improving power consumption on each node; this algorithm is based on some network element information such as hop count metric to build its virtual topology in which the same routing protocol is used separately within the same the virtual zone and between two different virtual zones through “Front Nodes”. At this stage, we focus our study around Distance-Vector algorithm for the intra-zone and inter-zones routing table construction and data routing algorithm, both of them compose the routing protocol called Zone-based Hierarchical Routing Protocol (ZHRP). Finally, using simulation results provided by J-SIM simulator, we evaluate the protocol performance in terms of error rates, power consumption, overcast, the size of the storage space.

Abstract:

State space representation is used to model various physical systems which can be expressed as an ordinary differential equation system. Lumped models lend themselves well to to this representation. In this paper we derive a general state space model for SMR resonators from the modified Butterworth-Van Dyke lumped equivalent model. The model is implemented under Matlab using the control systems tool box and its simulation results are validated using Advanced Design System (ADS). A resonator which series frequency is 2.05GHz is used to demonstrate its validity. We also show that the derived model is capable of transient time domain simulation and apply it for a finite energy harmonic signal.

Abstract:

Wireless communication allows connection to hardly accessible or even inaccessible locations for example the case of electrical machines. This wireless communication presents several benefits like for instance bigger design flexibility because of the absence of cable or the easier reconfiguration of electrical machines by an update. However, the integration of a wireless data link in electrical engineering systems is not self-evident, as the electromagnetic compatibility between devices isn't necessarily guaranteed. In this paper, we analyze the possible uses of wireless data transmission in electrical engineering.

Abstract:

Power line communications (PLC) offers an efficient and easy medium to transmit data, in many fields, like home automation and automatic meter reading (AMR). Nevertheless, to obtain a good rate and good signal quality, a good knowledge of the phenomenon acting on the electric transmission network is needed. Such as channel modeling, the reduction of impulsive noise and identification of load connected to mains. In this paper, we study and adapt a high resolution algorithm for identification of electrics loads, to the power line channel characteristics: Matrix Pencil (MP).

Abstract:

In this paper, we propose to improve the bandwidth efficiency for LTE Downlink systems basing on the Channel Quality Indicator (CQI) report. As LTE Downlink system is based on a MIMO-OFDMA technology, a cyclic prefix is inserted at the beginning of each transmitted OFDM in order to mitigate both inter-carrier interference (ICI) and inter symbol interference (ISI) caused by the multi-path propagation. An LTE radio frame is composed of 20 time slot each of 0.5ms. Each TS is composed of 7 OFDM symbols or 6 OFDM symbols. Therefore, CPs represents a major limit to the bandwidth efficiency for LTE Downlink systems. The CQI reports to the transmitter the channel conditions based on the estimated SNR. The transmitter will select the appropriate coding and modulation scheme. Previous works have shown that OFDM systems employing Zero Padding (ZP) technique and CP-OFDM systems have same performances but only for low SNR values. Therefore, we propose to apply a hybrid CP-ZP algorithm insertion at the transmitter based on the CQI report in order to improve the LTE bandwidth system. MATLAB Monte–Carlo simulations are used to evaluate the performance of the proposed estimator in terms of Bit Error Rate (BER) for 2x2 LTE Downlink systems.

Abstract:

We are interesting in this work to the analysis of electromagnetic coupling between two open waveguides (simulating horn antennas) based on a variant of the method of moments, the method of generalized equivalent circuits (MGEC)[1].

Abstract:

The evolution towards a low-carbon economy will transform mutually the way power is produced and the way it is consumed. Smart grids are a crucial element to enable this transformation and for reaching energy safety, reasonable energy prices and climate change moderation. In this paper we will give an overview of the smart grid keys features, market segments and applications, we will provide a brief description of smart grid impacts and role in reducing greenhouse gas emission, and we will conclude with the future vision of smart grid and some challenges to overcome in order to make it a reality.

Abstract:

Today, sensors and sensory systems for environmental and military applications have reached a high level. The recent advance in Information and communication with wireless technology give Wireless Sensor Network (WSN) tremendous capabilities.

Abstract:

In this paper, we propose a theoretical approach of a new estimator for a MIMO OFDM (Multi Input Multi Output Orthogonal Frequency Division Multiplexing) system which is based on the k- means algorithm. In fact, this approach is the first extension for the one proposed in a SISO OFDM. Each complex gain variation is approximated by a polynomial representation within several MIMO OFDM blocks. We will show here the architecture of the proposed estimator as an analytical for and the simulations results will be further proposed in an extension of this paper. Assuming knowledge of delay-related information, polynomial coefficients are obtained from time-averaged gain values, which are estimated using the least-square (LS) criterion. The channel matrix is easily computed, and the ICI is reduced by using successive interference suppression during data symbol detection. The algorithm’s performance is further enhanced by an iterative procedure, performing channel estimation and ICI improvement at each iteration. Theoretical analysis for a Rayleigh fading channel shows that the proposed algorithm has low computational complexity in the presence of high normalized Doppler spread.