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This paper investigates the error performance of the decode-and-forward (DF) based free space optical (FSO) communication system utilizing subcarrier intensity modulation (SIM) for binary phase-shift keying (BPSK) signalling in generalized M-distributed atmospheric turbulence. The M-distribution is a generic statistical model which unifies several existing distributions used for atmospheric turbulence...
Now a days mobile devices are capable of performing more operations in less amount of time. More number of GPU and CPU cores are added to the mobile devices. Due to increase in processing power various image processing algorithms are targeted at mobile devices. The users of these devices demand quality that is similar to that of a professional camera. There are definite limitations on the sensors...
In this work, a new technique is developed for exploration and map building in multiple mobile robots. This proposed technique uses the concept of frontier cells. This system tries to extend the existing exploration and mapping techniques of single robot to multi-robot to increase the exploration efficiency (i.e. to reduce the environment exploration time required). The goal of the proposed mechanism...
Line scratch is a prominent artefact in old films. In this paper, restoration of line scratch is proposed using spatio - temporal video cube. Video is considered as a cube and we assume that t, x and y are three flow directions of frames XY, TY and TX respectively. Vertical and horizontal line scratch is a line of some width in XY frame, but it appears as a rectangular patch in TY or TX frame. Such...
Solutions for facility location problems are numerous. As the problem is NP hard, continuous efforts have been made to find more efficient techniques. The nature of the facility adds to its variety. A popular approach has been based on geometric solutions. Other methods have also been tried; one of them is based on density applied for large databases as in Spatial Data Mining and Geographic Information...
Over past few years our group has been developing ARTSENS®, a low-cost, portable and non-invasive tool for measurement of arterial stiffness (AS). AS of the common carotid artery (CCA) has high prognostic value in stratification of risk of contracting cardiovascular disease (CVD) in future. ARTSENS uses a single element ultrasound transducer to obtain A-Mode frames from the CCA and processes them...
A sensor node is termed as “dumb” [1], if at a certain time instant it can sense its surroundings, but is unable to communicate with any of its neighbors due to the shrinkage in communication range. Such isolation occurs because of the presence of adverse environmental effects. However, the node starts its normal operation with the resumption of favorable environmental conditions. Thus, the detection...
This paper presents the study of novel compact printed elliptical slot antenna with ultrawideband characteristics. The antenna is composed of microstrip line fed rectangular patch and U-shaped tuning stub. Various dielectric substrates are examined for the better performance and characteristics of proposed elliptic-al slot antenna. Return losses, surface current distributions, farfield radiation patterns...
Recently, there has been a tremendous increase in mobile data usage with widespread proliferation of smartphone like devices and increasing popularity of video streaming services such as YouTube. This is already causing overloading of 3G cellular access networks. It is estimated that even the 4G LTE (Long Term Evolution) technology which has significantly higher spectral efficiency than 3G will also...
Over the years Vision based real time gesture recognition system has witnessed an exponential growth because of its manifoldness applications, ranging from sign language to virtual reality and its ability to interact with system efficiently through HCI. In this paper, we have proposed a hand gesture recognition system for American Sign Language recognition using important features of hand such as...
A JFET-based circuit for realizing a precision and linear floating voltage-controlled resistance (VCR) is presented for use in analog multipliers and programmable analog circuits and as a resistance mirror. It uses a matched JFET pair along with an op amp based negative feedback for realizing a precision resistance and a feedback of the source and drain voltages to the gate for realizing a linear...
This paper presents an effective single image spatially variant motion blur removal technique. Motion blur during the image capture occurs due to the relative motion between the capturing device and image being captured. This blur becomes spatially variant if it varies with position in an image. Removal of such space/shift variant blur from a single image is a challenging problem. To solve this problem,...
The electrical power industry is in the process of integration with bidirectional information and power flow infrastructure commonly called smart grid. Advance metering infrastructure (AMI) is an important component of the smart grid in which data and signal is transferred from consumer smart meter to smart grid and vice versa. Cyber security is to be considered before implementing AMI applications...
In this paper, an efficient, low memory embedded wavelet based color image coding technique is presented. The proposed algorithm is a listless variant of improved color set partitioning embedded block coding (CSPECK) algorithm. The inter-dependency among color planes is exploited by using novel clustering arrangement of luminance and chrominance subbands. This facilitate to encode simultaneously inter...
Design of a multiplier-less Robot navigation processor with anti-collision and Coordinate Rotation Digital Computer (CORDIC) based algorithm has been presented. The processor, deploying low power wireless Radio Frequency Identification Detection (RFID) technology has been implemented as an efficient VLSI architecture. The hardware of the processor has been realized up to RTL schematic level and fits...
Watermarking technique is used for protecting copyright of digital images. In this paper, we propose a novel technique for watermarking using DWT and SVD. DWT ensures imperceptibility of the watermark and SVD ensures its robustness against attacks. To address the issue of watermark security, we make use of Arnold transform. Watermark extraction is semi-blind, which avoids the need for original image...
Automated Fingerprint Identification Systems (AFIS) currently rely only on Level 1 and Level 2 features. But these features are not much helpful for forensic experts as the experiment deals with partial to full print matching of latent fingerprint. Forensic experts takes the advantage of extended feature proposed by “Committee to Define an Extended Fingerprint Feature Set” (CDEFFS). This paper presents...
This paper presents direct control of active and reactive powers of grid connected doubly fed induction generator (DFIG) driven by wind turbine. Stator winding of DFIG is directly connected to grid whereas rotor winding is connected to inverter. Sliding mode control (SMC) strategy is used to control the instantaneous active and reactive powers of DFIG. For this, the frequency of ac current fed into...
Water level control in boilers is an age old control problem that has challenged the frontiers of control engineering. More so the control problem offered by a marine boiler is even more intriguing. In this paper, a comparative study of cascade fuzzy logic controller for boiler water level control has been carried out between its different configurations. Thereafter a comparative study has been made...
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