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29,905 Article Results

Analysis and Design of High Gain NRI Superstrate Based Antenna for RF Energy Harvesting System

10.11591/ijeecs.v2.i3.pp647-656
K.K.A. Devi , C. H. Ng
A high gain patch antenna inspired by 4 layers of negative refractive index (NRI) metamaterial superstrate is proposed to operate at downlink radio frequency (RF) band (935 MHz to 960 MHz of GSM 900). The metamaterial unit cell consists of a nested split ring resonator (SRR) and strip line laminated on other side of FR4 substrate. The effective permittivity and permeability of the proposed unit cell are designed synchronously to approach zero, which leads the NRI superstrate to have impedance match with zero and negative refractive index.The NRI superstrate is studied using Fabry-Perot (F-P) resonant cavity. The gain is improved by 82.48% at the air gap of 55 mm in the desired frequency band.Therefore, the gain of the antenna is effectively enhanced based on the negative refractive index metamaterial. The measured radiation pattern and S parameter results also showed that it has good agreement with the simulation results.
Volume: 2
Issue: 3
Page: 647-656
Publish at: 2016-05-07

Hardware Implementation of Induction Motor using ANN Controller under Low Speed Operation

10.11591/ijeecs.v2.i3.pp522-529
Saranya R , Thangavel S
For the high performance drives the artificial neural network based Induction motor is proposed. During the load variation, the performance of the Induction motor proves to be low. Intelligent controller provided for controlling the speed of induction motor especially with high dynamic disturbances. An effective sensorless strategy based on artificial neural network controller is developed to estimate rotor’s position and to regulate the stator flux under low speed, helps to track the motor speed accurately during the whole operating region. The overall combination of this setup is simulated in the MATLAB/SIMULINK platform. Finally an experimental prototype of the proposed drive has been developed to validate the performance of Induction Motor and the dynamic speed response of Induction motor with proposed controller was estimated for various speed and found that the speed can be controlled effectively.
Volume: 2
Issue: 3
Page: 522-529
Publish at: 2016-05-07

Reducing Computational Complexity and Enhancing Performance of IKSD Algorithm for Encoded MIMO Systems

10.11591/ijeecs.v2.i3.pp636-646
Mohammed Qasim Sulttan
The main challenge in MIMO systems is how to design the MIMO detection algorithms with lowest computational complexity and high performance that capable of accurately detecting the transmitted signals. In last valuable research results, it had been proved the Maximum Likelihood Detection (MLD) as the optimum one, but this algorithm has an exponential complexity especially with increasing of a number of transmit antennas and constellation size making it an impractical for implementation. However, there are alternative algorithms such as the K-best sphere detection (KSD) and Improved K-best sphere detection (IKSD) which can achieve a close to Maximum Likelihood (ML) performance and less computational complexity. In this paper, we have proposed an enhancing IKSD algorithm by adding the combining of column norm ordering (channel ordering) with Manhattan metric to enhance the performance and reduce the computational complexity. The simulation results show us that the channel ordering approach enhances the performance and reduces the complexity, and Manhattan metric alone can reduce the complexity. Therefore, the combined channel ordering approach with Manhattan metric enhances the performance and much reduces the complexity more than if we used the channel ordering approach alone. So our proposed algorithm can be considered a feasible complexity reduction scheme and suitable for practical implementation.
Volume: 2
Issue: 3
Page: 636-646
Publish at: 2016-05-07

Model Predictive Current Control of Grid Connected PV Systems

10.11591/ijeecs.v2.i2.pp285-296
Satya Ravi Rai , Jaya Kumar S V , Keerthi Deepika K
This paper deals with the design and simulation of an efficient solar photovoltaic system with a maximum power point tracking system (MPPT). Maximum power point (MPP) is obtained by using Perturb and Observe (P&O) algorithm. The output from solar panel is fed to the DC-DC (Boost) converter which steps up the output voltage. It is then fed to a 3-phase inverter. The inverter used is a 3-phase two-level inverter implemented with a Model Predictive Control strategy. Model of the system is considered in order to predict the control variables. Optimum switching state is selected by minimizing the cost function for each sampling period. This is achieved through modelling and MATLAB simulation of various stages that constitute the overall system.
Volume: 2
Issue: 2
Page: 285-296
Publish at: 2016-05-01

Extension of Linear Channels Identification Algorithms to Non Linear Using Selected Order Cumulants

10.11591/ijeecs.v2.i2.pp334-343
Mohammed Zidane , Said Safi , Mohamed Sabri
In this paper, we present an extension of linear communication channels identification algorithms to non linear channels using higher order cumulants (HOC). In the one hand, we develop a theoretical analysis of non linear quadratic systems using second and third order cumulants. In the other hand, the relationship linking cumulants and the coefficients of non linear channels presented in the linear case is extended to the general case of the non linear quadratic systems identification. This theoretical development is used to develop three non linear algorithms based on third and fourth order cumulants respectively. Numerical simulation results example show that the proposed methods able to estimate the impulse response parameterswith different precision.
Volume: 2
Issue: 2
Page: 334-343
Publish at: 2016-05-01

A Power Efficient Trust Based SecureRouting Scheme for Mobile Ad-Hoc Networks

10.11591/ijeecs.v2.i2.pp417-425
M V Rathnamma , P. Chenna Reddy
MANETs are self-organizing, infrastructure less ad-hoc networks with many challenges like low power, limited storage and limited processing devices. Among all the parameters that affect the network efficiency accuracy, scalability, and power consumption are main challenges in the routing of Mobile ad-hoc networks. The network lifetime is dependent on the power efficiency of the nodes in the network. The protocols have to provide the energy efficient route through intermediate nodes in the network. The trust based routing approach is one of the best mechanisms to establish an energy efficient route between source and destination. In this paper we first propose the family relationship based trust model and then propose a new energy efficient trust based routing protocol to reduce the routing overhead, delay and provides better packet delivery ratio that performs better than the existing routing protocols.
Volume: 2
Issue: 2
Page: 417-425
Publish at: 2016-05-01

Reconfiguration of Distribution Networks with Presence of DGs to improving the Reliability

10.11591/ijeecs.v2.i2.pp241-247
Amir Sabbagh Alvani , Seyed Mehdi Mahaei
In this paper, the network reconfiguration in the presence of distributed generation units with the aim of improving the reliability of the network is studied. For this purpose four reliability parameters in the objective function are considered, which is average energy not supplied system average interruption frequency index, system average interruption duration index and momentary average interruption frequency index. The new method will be normalized objective function. Another suggestion of this paper are considering the different fault rates, locating time of faults type and prioritization of customers based on their importance. This nonlinear problem has optimized by particle swarm optimization (PSO) algorithm.
Volume: 2
Issue: 2
Page: 241-247
Publish at: 2016-05-01

Color Module Computer Aided Design in Indoor Environment

10.11591/ijeecs.v2.i2.pp461-468
Lifeng Pan
In this study, a comprehensive solution set of strategies is proposed for interior color design. Computer aided design methods are utilized to solve the problems in the color scheme process, the existing circumstances, shortage and trend of current color scheme tools are analyzed based on interior design theory and modern design methodology. The appropriative color space is constructd to redound the process of special color selection,the tone harmonizing tool is built based on architecture exterior design,and  the color  knowledge database and scheme database are contrived,the rationality of the color scheme method is validated by integrated cases, the effective way of computer aided color design is obtained and  this method is applied to the instance of interior design, it provides a key module for the interior design system software. In the design process, the factors are taken such as color space property,color harmonizing effect,color tone classification, material and texture effect,  a viable color enactment is provided for modern interior design.
Volume: 2
Issue: 2
Page: 461-468
Publish at: 2016-05-01

Improved UFIR Tracking Algorithm for Maneuvering Target

10.11591/ijeecs.v2.i2.pp344-350
Shoulin Yin , Jinfeng Wang , Tianhua Liu
Maneuvering target tracking is a target motion estimation problem, which can describe the irregular target maneuvering motion. It has been widely used in the field of military and civilian applications. In the maneuvering target tracking, the performance of Kalman filter(KF) and its improved algorithms depend on the accuracy of process noise statistical properties. If there exists deviation between process noise model and the actual process, it will generate the phenomenon of estimation error increasing. Unbiased finite impulse response(UFIR) filter does not need priori knowledge of noise statistical properties in the filtering process. The existing UFIR filters have the problem that generalized noise power gain(GNPG) does not change with measurement of innovation. We propose an improved UFIR filter based on measurement of innovation with ratio dynamic adaptive adjustment at adjacent time. It perfects the maneuvering detect-ability. The simulation results show that the improved UFIR filter has the best filtering effect than KF when process noise is not accurate.
Volume: 2
Issue: 2
Page: 344-350
Publish at: 2016-05-01

Design of Electro Cardiograph Machine Based on Atmega Microcontroller

10.11591/ijeecs.v2.i2.pp328-333
Bambang Guruh Irianto , Budhiaji Budhiaji , Syaifudin Syaifudin
ECG machine on the market, has a considerable cost, the technology used is still very complicated. In efficient and display ECG still not interconnect with other devices. In this study, the researchers designed ECG machine 12 channels to take advantage ATMega microcontroller technology, Graphic LCD 64x12, which can be obtained on the market at low prices, thus yielding a portable ECG apparatus, can interconnect with other devices and cheap. Objective is to design a  ECG machine using ATMega microcontroller technology, by making a series of bio amplifier ECG, measuring the amplitude and frequency response bio amplifier, and make the ECG signal processing circuit with microcontroller, which can be displayed on a 128x64 graphic LCD or PC. To answer the research objectives, the design of the research is to use pure experimental research is the design of experimental series. The independent variable ECG phantom or human and the dependent variable is the ECG machine. While the design  ECG machine  through the stages as follows: circuit design, circuit testing and calibration output. The conclusion of this study: The result of the design of microcontroller ATMega program listings can be used transform and run the program to the ECG machine to know the number of heartbeats, a beep sound every wave R  the ECG signal, displayed on the graphical LCD, PC, printed through a computer, and can be stored in computer.
Volume: 2
Issue: 2
Page: 328-333
Publish at: 2016-05-01

Review on AC-AC Converter Based Dynamic Voltage Restorer

10.11591/ijeecs.v2.i2.pp297-304
Tamilvanan G. , Mahendran S.
The maintain power quality is one of the major part of all kind of industry as well as power systems. Voltage sag and voltage swell the common power quality issue. The Dynamic Voltage Restorer is the common Device which is used to mitigate the above problems. In this paper provides review on various type of AC-AC converter based DVR. The use of AC-AC converter can compensate the voltage sag and swell without need of any kind of storage elements like capacitor and batteries. The absence of storage elements can reduce size and weight of the DVR. The feature various type of AC- AC converters based DVR is concentrated in this paper.
Volume: 2
Issue: 2
Page: 297-304
Publish at: 2016-05-01

Investigating Ferroresonance Phenomenon in a Single-Phase Transformer with the Effect of Magnetic Hysteresis

10.11591/ijeecs.v2.i2.pp248-258
Behrooz Rezaeealam , Behzad Norouzi
Ferroresonance is a non-linear phenomenon and very dynamic in the power quality problems. This phenomenon should be carefully analyzed so that preventive measures could be taken before its appearance and prevent injury and damage to electrical power appliances. Ferroresonance is seen more in the middle-voltage networks with supplying unloaded or slightly loaded transformers by cables. The materials used in the manufacture of transformer cores are creates a major role in their dynamic behavior. In this article are used from two types magnetic material GOES and NGOES in the transformer core of single phase. The physical behavior of these materials is considered during the core hysteresis. For modeling the hysteresis loop has been used from Jiles-Atherton method. By using the finite element method and with help COMSOL Multiphysics Software, transformer is simulated in two space dimensions. Laboratory test the transformer core hysteresis loop is described and shows which the Jiles-Atherton model is one of the best known models of hysteresis. The results shows which use of GOES materials in the transformer core is cause Significant reduction the core losses in comparison with the NGOES materials. Also change of ferroresonance mode and the severity its occurrence are the results of changing the material used in the transformer core.
Volume: 2
Issue: 2
Page: 248-258
Publish at: 2016-05-01

RFID Personnel Control System That Can Be Managed Via 4.5G

10.11591/ijeecs.v2.i2.pp396-408
Abdülkadir ÇAKIR , Halil KAYGISIZ
The current study aimed to reveal that personnel control by the employer should be conducted using Radio Frequency Identification (RFID) technology in an easier and more modular way. The most important feature differentiating the RFID from the existing technologies is that it works wirelessly. The hardware used in the study can be managed via Ethernet port. In this study, it is ensured that data be transmitted via Internet by using a mobile cellular communication system. The control of the set up system can be conducted wirelessly via any environment in which an Internet connection can be established. Thanks to the created system, information about arrival and departure dates of the places to where the mobile personnel should go can be monitored 24/7 from anywhere that has internet connection. As a result of the tests and applications that have been conducted, it has been seen that the data could not be transmitted in a radio-frequency environment because of the error caused by the RFID tag. As a result of the calculations made after the application, it has been put forward that the error margin is 7±1%.
Volume: 2
Issue: 2
Page: 396-408
Publish at: 2016-05-01

Failure Analysis and Reliability Study of NAND Flash-Based Solid State Drives

10.11591/ijeecs.v2.i2.pp315-327
R. Sayyad , Sangram Redkar
The research focuses on conducting failure analysis and reliability study to understand and analyze the root cause of Quality, Endurance component Reliability Demonstration Test (RDT) failures and determine SSD performance capability. It addresses essential challenges in developing techniques that utilize solid-state memory technologies (with emphasis on NAND flash memory) from device, circuit, architecture, and system perspectives. These challenges include not only the performance degradation arising from the physical nature of NAND flash memory, e.g., the inability to modify data in-place read/write performance asymmetry, and slow and constrained erase functionality, but also the reliability drawbacks that limits Solid State Drives (SSDs) performance.  In order to understand the nature of failures, a Fault Tree Analysis (FTA) was performed that identified the potential causes of component failures. In the course of this research, significant data gathering and analysis effort was carried out that led to a systematic evaluation of the components under consideration. 
Volume: 2
Issue: 2
Page: 315-327
Publish at: 2016-05-01

Arithmatic Coding Based Approach for Power System Parameter Data Compression

10.11591/ijeecs.v2.i2.pp268-274
Subhra J. Sarkar , Nabendu Kr. Sarkar , Trishayan Dutta , Panchalika Dey , Aindrila Mukherjee
For stable power system operation, various system parameters like voltage, current, frequency, active and reactive power etc. are monitored at a regular basis. These data are either stored in the database of the system or transmitted to the monitoring station through SCADA. If these data can be compressed by suitable data compression techniques, there will be reduced memory requirement as well as lower energy consumption for transmitting the data. In this paper, an algorithm based on Arithmetic Coding is developed for compressing and decompressing such parameters in MATLAB environment. The compression ratio of the algorithm clearly indicates the effectiveness of the algorithm.
Volume: 2
Issue: 2
Page: 268-274
Publish at: 2016-05-01
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