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An interference coordination well suited to OFDMA based wireless network in which cells are divided into special region with various frequency reuse factors, is termed as Fractional Frequency Reuse (FFR). This research focuses on the concept as well working of FFR in Hexagonal geometrical structure for systematic frame work and evaluation. The scheme includes the extensive literature review of both...
Change of linearity and gain with different drain and gate bias has been studied for AlGaN/GaN HEMT on Sapphire substrate. While linearity increases with higher drain bias, maximum gain of the device decreases. Generation of more phonon and its related scattering of electrons decrease the mobility of carries. It further minimizes the drain current at high longitudinal field on 2DEG channel.
This paper aims at non contact measurement of liquid density using ultrasonic transducers. The approach is based on the travel time of ultrasonic wave through medium from transmitter to receiver. Lab VIEW platform is used to calculate the travel time of ultrasonic wave between the transmitters to receiver. N1 Elvis is used for real time implementation. Results show that the proposed system has fulfilled...
High quality pseudomorphic Al0.15Ga0.85As/GaAs heterostructure was grown on an semi-insulating GaAs(100) substrate by Molecular Beam Epitaxy(MBE). Analysis of this structure was done by Photoluminescence (PL), HALL and High Resolution X-Ray diffraction (HRXRD). The nominal structure was confirmed by HRXRD, and aluminum mole fraction was measured from peak separation of the AlGaAs-GaAs (004) reflections...
This paper includes the discussion about the principle of working, performance investigation and simulation of FPGA controlled three-level diode clamped inverter, which is fed by solar PV based DC bus. DC bus was created with the help of solar PV modules and charge controller to feed DC loads directly or AC loads indirectly through proposed three-level inverter. FPGA based three-level inverter was...
In this paper a novel super junction device with vertical deep trench is proposed which have arsenic implant at the bottom of the trench. The device is a conventional vertical N-channel DMOS with a deep trench adjacent to the gate. The trench forms vertical sidewall into which boron is implanted and diffused to form a P-type doping pillar which is charge balanced to the N-type epitaxial drift region...
The evolution of Bipolar CMOS DMOS (BCD) technology leads in the improvement of design technology to produce better device performance with fabrication cost effectiveness as concerned. In this paper, 0.18µm BCD technology with linear p-top layer N-channel LDMOS structure from 20V to 60V is presented with best in class Ron for both N-channel and P-channel LDMOS compared to recent BCD technology works...
The stability and applicability of new cadmium complex, Cdmq2, is investigated for electroluminescent device application. The Cdmq2 is characterised by different characterisation techniques. It shows excellent thermal stability up to 440 °C. A maximum is observed at 390 nm in absorption spectra which attributed to π - π* transition. Organic light emitting diode (OLED) has been fabricated using this...
Smart card is a widely accepted user authentication tool to ensure only authorized access to resources available via open networks. In 2010, Sood et al. and Song independently examined a smart card based authentication scheme proposed by Xu et al. They showed that in Xu et al.'s scheme an internal user of the system could turn hostile to impersonate other users of the system. Sood et al. and Song...
Support Vector Machine (SVM) has been very popular for use in machine fault diagnosis as classifier. In most of the complex machine learning problems, the main challenge lies in finding good features. Sparse autoencoders have the ability to learn good features from the input data in an unsuperivised fashion. Sparse auto-encoders and other deep architectures are already showing very good results in...
A solution to the relative scale problem where reconstructed moving objects and the stationary world are represented in a unified common scale has proven equivalent to a conjecture. Motion reconstruction from a moving monocular camera is considered ill posed due to known problems of observability. We show for the first time several significant motion reconstruction of outdoor vehicles moving along...
Shunt active power filter is widely used in modern electrical distribution system and it needs an accurate control algorithm that provides robust performance under source and load unbalances. During source voltage disturbances, the presence of negative sequence component in the source current causes significant double frequency oscillations in the dc-link and it can lead to deterioration of dc-link...
This paper presents simulation of DC-DC converter with matrix converter as its basic topology. The proposed converter performs the four quadrant chopper operation. This topology can perform many different converter functions. This DC-DC converter can be utilized in speed control of dc motor in electric automobiles and traction where supply is dc voltage. The simulation model was developed in MATLAB/Simulink...
While real scenes produce a wide range of brightness variations, current cameras use low dynamic range image detector that typically provide 256 levels of brightness data at each pixel. We propose methods to create High Dynamic Range images, the method to enhance the dynamic range of is based on capturing multiple exposure photographs of the scene. Even if there are few methods available for creating...
This paper contains a method to implement a mobility aid for blind person and also can be used in automatic robots, self-propelling vehicles in automated production factories etc. Model contains signal processing unit with PIC microcontroller which receives data from Ultrasonic sensor and Temperature sensor then processed it and delivers it to the computer using serial input/output port & gives...
In this paper, a speech enhancement technique proposed by Soon and Koh is examined and improved by exploiting different window functions for pre-processing of speech signals. In this method, instead of using twodimensional (2-D) discrete Fourier Transform (DFT), Ridgelet transform is employed with different window through spectral magnitude subtraction method. A comparative study of performance of...
In the social networks, rumors can spread and affect the society. To characterize rumor propagation in scale free networks, we propose a rumor spreading model which uses the acceptability factor to control the rumor. In this model we introduced a new compartment of stifler who rejects the rumor in comparison with existing SIR model. An ignorant can reject the rumor and become stifler when it gets...
A Model reference adaptive control (MRAC) belongs to the class of adaptive servo system in which the desired performance is expressed with the help of a reference model. MRAC aims to create a closed loop controller with parameters that can change the response of the system to mimic a desired response. However, analysis unravels that there is a tolerance band for the set point change which defines...
Motion segmentation is an inevitable component for mobile robotic systems such as the case with robots performing SLAM and collision avoidance in dynamic worlds. This paper proposes an incremental motion segmentation system that efficiently segments multiple moving objects and simultaneously build the map of the environment using visual SLAM modules. Multiple cues based on optical flow and two view...
A duo such as Hindi-English (Hin-Eng) does differ in terms of grammar, and thus finding correspondences is often quite obscure in word alignment. Hindi being rich in morphology makes the alignment with its counterpart a bit contingent and invites obscurities in annotation process. We present annotation guidelines for Hin-Eng word alignment through contrastive analysis of the two languages. We applied...
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