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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 98 Documents
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Search results for , issue "Vol 12, No 7: July 2014" : 98 Documents clear
Spatial Characteristics of Wireless Channel in Tunnel with Imperfect Walls Yi Zhang; Zhao Xu; Bo-Ming Song; Yu Huo
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5499-5507

Abstract

The successful design and application of the physical layer techniques of the wireless network, including MIMO, adaptive OFDM, and mining antenna, to name a few, need the detailed knowledge of the spatial characteristics of the transmitted signals. This paper provides a modal approach to quantify the spatial distribution of the waves in tunnels in detail. We develop the modal theory for propagation in a tunnel with imperfect walls, which are lossy, rough, and tilted. And then, we discuss the transmission power of the antenna as a function of the angles of departure (AOD). On this basis, we take the half-wave dipole antenna as an example to analyse by simulations. The theoretical results show that the angular power distribution in the rectangular tunnel follows Gaussian distribution. The angle spread (AS) of the waves can be influenced by the tunnel walls. The roughness of the wall surface is most important in small tunnels and at low frequencies, whereas the wall tilt is most important in large tunnels and at high frequencies.
Object Tracking Based on Multiple Features Adaptive Fusion Jie Cao; Leilei Guo; Jinhua Wang; Di Wu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5621-5628

Abstract

Multiple features fusion based tracking is one of the most active research in tracking literature, In this paper, a novel adaptive fusion strategy is proposed for multiple features fusion, based on two common used fusion rules: product rule and weighted sum rule. This strategy employs particle filtering technique; product rule and weighted sum rule are unified into an adaptive framework through defined features distance. In practice, the new fusion strategy shows more robustness than product fusion and weighted sun rule.
Modeling of Tunnel Junction (GaAs) in the Cascade Solar Cell Dennai Benmoussa; Benslimane H; Helmaoui A; Hemmani A
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp4924-4927

Abstract

In this paper describes a simple model for tunnel junction (GaAs) between the top cell (GaAs) and bottom cell (Ge) of cascade solar cells. We theoretically studied the electrical characteristics (IV) of GaAs tunnel diode with the accounting program MATLAB for doping concentration of the junction after Using this model between two cascaded solar cell (GaAs / Ge) and we calculate the electrical characteristics and performance using AMPS-1D software. The conduction properties of this tunnel diode show good ohmic behavior and low contact resistance.
Effect of Contamination on Electric Field Distribution of DC Voltage Divider Caibo Liao; Ruan Jiangjun; Du Zhiye; Liu Chao
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5071-5077

Abstract

In order to research the influence of the contamination around the external insulating surface of DC voltage divider with different types in the electic field distribution by using the finite element method, a two dimensional axisymmetric model of the DC voltage divider in Longquan convertor station is built. Through the calculation comparison in electrostatic and quasi-electrostatic field, the relative dielectric constant of the dry, moist and the non-uniform mixed contamination layer is discussed under the condition of the material parameters is known in quasi-electrostatic field .Analysis shows that for dry contamination，the field type has no influence on the electric field distribution when the parameters of the materials are same. While for moist contamination，the relative dielectric constant in electrostatic field should be set according to the material resistivity in quasi-electrostatic field and the actual condition. The calculation of the non-uniform contamination prove that the materials parameters in electrostatic filed is reasonable.
Design of 3-Bit ADC in 0.18 µm CMOS Process Mohammad Marufuzzaman; Syarizal Z. Abidin; Mamun Bin Ibne Reaz; Labonnah Farzana Rahman
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5197-5203

Abstract

Analog-to-digital converters (ADCs) are required to convert the real world analog signals into digital signals, as digital signals are more robust and easier to handle. Signal processing is increasingly being done in the digital domain along with the escalating levels of integration have forced ADC to reside on the same chip as digital circuits. The study describes the design method of 3-bit ADC using CEDEC 0.18 μm CMOS process. The designed ADC consists of; voltage divider, comparator and 7-bit encoder circuits. The pre-simulation has done with ELDO simulator with low power supply voltage (VDD) 1.8 V. The simulated results showed that the designed 3-bit ADC is able to convert analog signals to digital signals.
Sensor Fusion via Brain Emotional Learning for Ground Vehicle Alvaro Vargas-Clara; Sangram Redkar
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5324-5330

Abstract

In this work, the analysis of a filter consisting of the Brain Emotional Learning (BEL) algorithm is presented. The inner workings of the BEL filter are based on emotional learning model in mammalians brain. The BEL filter is implemented in simulation for the purpose of sensor fusion in a ground vehicle. In simulation, the signals from a Global Positioning System (GPS) and an Inertial Navigation System (INS) are integrated, in order to accurately track the trajectory of a ground vehicle around a track. The BEL filter is provided with some sensory signal and reward signal, subsequently the filter seeks to diminish noise from both sensing units, thus eliminating tracking error. A performance comparison between the BEL filter, and the more commonly utilized Kalman filter is presented. The BEL filter demonstrated robustness to uncertainties from the sensing units, it adapts quickly with dynamical change in the plant, and has small computational cost. The BEL filter demonstrated to be effective in sensor fusion. 
Performance Analysis of A Hybrid Mimo Technique for High Rate Wireless Communication System Kehinde Odeyemi; Erastus Ogunti
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5458-5468

Abstract

The demand for higher data rate and better quality of service (QoS) in wireless communications was growing fast in the past few years. Obtaining these requirements becomes challenging for wireless communication systems due to the problems of channel multi-path fading, higher power and bandwidth limitations. One of the most promising solutions to this problem is Multiple Input Multiple Output (MIMO) system. This paper proposed a combined spatial multiplexing MIMO scheme with beamforming for high data rate wireless communication. The proposed transmission scheme combines the benefits of both techniques and the system was able to transmit parallel data streams as well as providing beamforming gain. Actually, these diverse techniques, share the same requirement of multiple antenna elements, but differ in the antenna element spacing necessary for the different schemes to work. Thus, smart antenna array was proposed as a possible solution and was adopted at the both transmitter and the receiver. The hybrid technique provides higher spectral efficiency and improve better Bit error rate (BER) of the system than the conventional MIMO, spatial multiplexing and beamforming techniques under the same simulation environment.  
Polygraph Survey and Evaluation Based on Analytic Hierarchy Process Zhixia Jiang; Yibo Liu; Pinchao Meng
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5585-5590

Abstract

The analytic hierarchy process (AHP) is a kind of combining quantitative analysis and qualitative analysis of comprehensive evaluation method. In modern personality test, lying is a common phenomenon. This paper combined with the actual survey results, using AHP to measure the process of empowerment, in fact is through the hierarchy model is set up as index system, the subjective indicators of two comparison and evaluation, through the judgment matrix to calculate the weight coefficient of every index. After through the consistency check, corresponding to hiring and personality assessment to empowerment in school keep file, in order to obtain better truth, accuracy, so as to realize are established for the big five personality test scores, to a certain extent, to avoid lying, better more authenticity of the test results.

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