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Partial Transmit Sequence Scheme for PAPR Reduction in OFDM Systems: A Review
Ankit Dixit ; Prachi Parashar; Dr. Soni Changlani
Communication Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 179 - 184
The high Peak to Average Power Ratio (PAPR) of the transmitted signals the main drawback of OFDM system. OFDM Suffers as the no of Subcarriers operating in the large dynamic range operates in the non-linear region of amplifier due to OFDM suffer the PAPR problem Application of high power amplifiers results in increased component cost. To reduce Peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) Partial transmit sequence scheme is a promising algorithm. Partial Transmit Sequence (PTS) consist of several inverse fast Fourier transform (IFFT) operations and complicated calculations to obtain optimum phase sequence which results in increasing the computational complexity of PTS. There are various methods and scheme has been proposed to reduce the complexity of the algorithm with no increment or reduction in the PAPR also. This article presents a review of various complexity reduction techniques for PTS.
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LANGUAGE TRANSLATOR USING OCR IN LabVIEW
D.VAISHNAVI ; K.KARTHIK; EL.RAMKUMAR; I.S.NIVETHITHA
Instrumentation And Control Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 185 - 188
Language translation has become very much vital and is used for several applications. The primary objective of this research article is to ensure proper translation of desired and predefined words of a particular language to English along with audio indication, in order to enhance the quality of communication between people from different parts of the world using OCR in LabVIEW. OCR is most widely used for text based searching, character recognition, pattern matching etc. This deals with images of the objects with regard to their orientation and shape. The system is trained by feeding images of the objects and then it is tested by comparing with the images of the same object taken at real time. The trained objects are recognized by the system. This system is used for creating a language translator by training the system to identify most frequently used words in different languages. Our research work also intends to eliminate the problem faced by blind people by providing with an audio indicator
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A Survey on Attacks, Challenges and Security Mechanisms in Wireless Sensor Network
Abdul Wahid ; Pavan Kumar
Computer Science and Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 189 - 196
The wireless sensor network (WSN) has becomes the research area in today’s worlds due to the huge number of application taking the advantage from it. Sensors are small device having memory, power and processing chip that makes it processing device. Due to its dominant nature it is used in battlefields and commercial applications such as building, traffic surveillance, habitat monitoring and smart homes and many more scenarios. Main motive behinds this paper is to introduce different types of attacks encounters during transmission or communication over the wireless sensor network and provides some ideas to overcome from these attacks. Here, we introduce security mechanisms like cryptographic key, authentication and challenges in wireless sensor network. The power computation and unsecure communication is main challenging area of wireless sensor network
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Analysis on the Dynamic Effect of Shear Force on an H-Section Block
Tapishnu Samanta
Mechanical Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 197 - 201
The Paper presents an analysis on the dynamic effect of shear force on an H-section block free to move and thereafter the concept is incorporated on a cast iron block to study whether the theoretically calculated results corresponds to the experimental results. A static analysis has also been done to identify the validity of the experiment performed. The paper also presents the conditions for failure when the shear force is applied on the extreme end of the H-section block. Although the experiment has be carried out for a cast iron block, the main goal of this experiment is to analyze the effect of shear force on large structures, beams and truss members. With further optimization this process can also be utilized to calculate the young’s modulus of a material.
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Finding indoor position of person using wi-fi & smartphone:A survey
Pooja U. Barwal ; Gajanan D. Bonde; Kiran P. Ablankar; Sandhya Pal; Sumaiya I. Khan
computer engineering
Year: 2015, Volume:1, Issue : 8
Pages: 202 - 207
Positioning system can be used for different purposes and for different services, so a lot of research is going on to find a more accurate position with low error techniques with good results. The Positioning techniques have been actively studied recently due to service as well as safety and security matters. Global Positioning System (GPS) is more widely used for outdoor but GPS is not suitable for indoor . There are many localization systems with different architectures, configurations, accuracies and reliabilities Wi-Fi Positioning system (WPS) solves this problem. Here we find out position with the help of Wi-Fi signal strength. We also discuss location fingerprinting in detail since it is used in most current system or solutions. A small program installed on to calculate the position. This will help in many applications for mobile users and network administrators. It will make use of existing Wi-Fi infrastructure, although Wi-Fi system was never designed to find out the location. The smart device regularly scans the signal strengths for surrounding Wi-Fi access points and send information to a central server. This paper try to survey the recent work related to indoor positioning system.
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A Review on Advancements in Concrete Using Nano Technology
S.Soundarya ; M.Sowmya; E.Sujithra; N.Manoj; A.Deepak
civil engineering,electronics and communication engineering
Year: 2015, Volume:1, Issue : 8
Pages: 208 - 211
The Construction business is the major consumer of energy sources of India. Among all the materials utilized in construction, concrete is the most generally used with the ingredients extracted from the nature, except cement, and have a major impact. The basic characteristics of concrete structures and materials can be altered by adding nano materials to increase mechanical properties and other parameters. A reduction in size of particles provides an exceptional surface area-to-volume ratio and changes within the surface chemistry, surface morphology, and surface energy of the particle. If cement with nano-size particles are manufactured and processed, there will be a variety of opportunities within the fields of ceramics of high strength composites and electronic applications. Furthermore, for the fine finishing and glazing purpose where strength is not a major criteria, nano materials in blend with cement is being used widely.
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Power Efficient Management in Data Center Using Server Consolidation for Green Computing
R.Gnanasundaram ; S.Suresh
Computer Science & Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 212 - 215
A Cloud computing has revolutionized the Information Technology industry by enabling elastic On-Demand provisioning of computing resources. Cloud data centers consume enormous amounts of electrical energy resulting in high operating costs and carbon-di-oxide emissions. The goal is to improve the utilization of computing resources and reduce energy consumption under workload independent quality of service constraints. Virtual Machine consolidation leverages fine-grained fluctuations in the application workloads and continuously reallocates Virtual Machines to minimize the number of active physical nodes. Server virtualization is a prominent approach to consolidate applications from multiple applications to one server. With a growing concern on the considerable energy consumed by data centers, research efforts are targeting toward green data centers with higher energy efficiency. The results obtained have proved that Server Consolidation has greatly reduced the energy consumption without affecting the performance of the system.
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Performance Analysis Of Neural Network Based Narma Control For CSTR
Pratik Chokhoba Ghutke ; Prof A.B. Patil
Electrical Control system Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 216 - 222
In this paper two intelligent control schemes based on artificial neural network for temperature control in a jacketed Continuous Stirred Tank Reactor. Objective is to regulate the reactor temperature for an exothermic reaction taking place in the CSTR by manipulating the thermal condition of jacket. PID based NARMA-L2 and PID based ANFIS controller are designed and their performances are analyzed and compared. The simulation results show the response of ANFIS control is better than NARMA-L2 control.
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Performance Analysis Of Shunt Active Power Filter for Various Reference Current Generation Techniques
Gaurao A. Dongre ; Vishal V. Choudhari; Prof. Mrs. S. P. Diwan
Electrical Engineering
Year: 2015, Volume:1, Issue : 8
Pages: 223 - 228
A number of reference current generation have been developed for analysis of shunt active power filter to mitigate the load compensation. Depending upon the type of load the technique have to be chosen. In this paper, six reference current generation techniques viz. instantaneous reactive power theory(IRP), Synchronous reference frame theory(SRF), Perfect harmonic cancellation(PHC), Unity power factor method(UPF), Self tuning filter method(STF), Predictive filtering method(PFM) are compared for different operating conditions. The harmonic are introduced because of non-linear loads in system. These harmonics are eliminated using above techniques. The results and performance of system simulated on MATLAB/Simulink platform. The system is experimentally implemented using DS1104 card of dSPACE system.
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Quality Issues in Radar Wind Profiler
C.Abhishek ; P.Nikitha Reddy
ELECTRONICS AND COMMUNICATION ENGINEERING
Year: 2015, Volume:1, Issue : 8
Pages: 229 - 231
The paper discusses possible quality issues of operational radar wind proï¬lers (RWP). Ground-based remote measurements of the vertical proï¬le of the horizontal wind vector in the atmosphere by radar wind proï¬ler (RWP) are a technique that has been signiï¬cantly. The main advantage of RWP’s is their ability to provide vertical proï¬les of the horizontal wind at high temporal resolution under almost all weather conditions that is in both the cloudy and the clear atmosphere.
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Abstract
