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Dutta M.K.,GCET | Gupta P.,Indian Institute of Technology Kanpur | Pathak V.K.,HBTI
Journal of Computers | Year: 2010

This paper proposes an efficient watermark generation method for audio copyright protection and digital right management. It proposes a method of generating pseudorandom sequences based on iris image templates. These biometric generated sequences (bio-keys) are found to be unique for distinct identification purposes. These bio-keys are used as the watermark for audio signals. The correlation of the extracted bio-key with a database of 150 bio-keys reveals that the best correlation is 1 while the next best correlation is less than 0.4 under no attack condition. Even under serious signal processing attacks, the bio-keys have distinctly been identified and mapped in a database. Experimental results of listening evaluation and robustness tests have confirmed that the use of bio-keys maintains good perceptual property and offers strong resistance to the typical signal processing attacks. © 2010 ACADEMY PUBLISHER.

Dash S.K.,Indian Institute of Technology Kharagpur | Samanta A.,GCET | Samanta A.N.,Indian Institute of Technology Kharagpur | Bandyopadhyay S.S.,Indian Institute of Technology Kharagpur
Fluid Phase Equilibria | Year: 2011

This work presents new experimental results for carbon dioxide (CO2) solubility in aqueous piperazine (PZ) in the temperature range of (298-328) K and CO2 partial pressure of about (0.1-1500)kPa. The concentrations of the aqueous PZ were in the range of about (0.2-4.5)M. A thermodynamic model based on electrolyte nonrandom two-liquid (ENRTL) theory has been developed to correlate and predict the vapour-liquid equilibrium (VLE) of CO2 in aqueous PZ. The model predictions have been in good agreement with the experimental data of CO2 solubility in aqueous blends of this work as well as those reported in the literature. It is observed that, at low temperature (up to 333K) and low PZ concentration, using regressed ENRTL interaction parameters and Henry's constant of CO2 in water is sufficient to predict VLE of CO2 in aqueous PZ. However, at high temperature and high PZ concentration, it is required to adjust Henry's law constant in aqueous solution of PZ for better prediction of CO2 partial pressure over aqueous PZ solution. The current model can also predict speciation, heat of absorption, pH of the loaded solution, and PZ volatility. © 2010 Elsevier B.V.

Amin M.R.,GCET | Trapasiya S.D.,GCET
Procedia Engineering | Year: 2012

In MIMO system multiple antennas arc used at transmitter and receiver side. MIMO has many advantages in comparison to SISO in terms of capacity, bit-rate and reliability. MIMO is classified mainly in three categories: spatial multiplexing, spatial diversity and beam forming. Spatial multiplexing provide higher data rate and spatial diversity effectively reduce bit- error rate. Here, we are mainly focusing on the space time coding which is basically a spatial diversity technique. The objective of this literature survey is to provide a comprehensive overview on space time coding technique. Here, large number of papers are provided on space time coding technique. In this paper, topics such as channel coding, space time coding for frequency flat fading channels,MIMO & MIMO-OFDM channels with ISI arc discussed. The cited papers will serve as a good beginning for further reading. © 2012 Published by Elsevier Ltd.

Veer K.,Thapar University | Sharma T.,GCET
Journal of Medical Engineering and Technology | Year: 2016

This paper presents the detailed evaluation and classification of Surface Electromyogram (SEMG) signals at different upper arm muscles for different operations. After acquiring the data from selected locations, interpretation of signals was done for the estimation of parameters using simulated algorithm. First, different types of arm operations were analysed; then statistical techniques were implemented for investigating muscle force relationships in terms of amplitude estimation. The classification (Artificial Neural Network) based results have been presented for detecting different pre-defined arm motions in order to discriminate SEMG signals. The outcome of research indicates that a neural network classifier performs best with an average classification rate of 92.50%. Finally, the result also inferred the operations which were observed to be easy for arm recognition and the study is a step forward to develop powerful, flexible and efficient prosthetic designs. © 2016 Informa UK Limited, trading as Taylor & Francis Group

Samanta A.,GCET | Bandyopadhyay S.S.,Indian Institute of Technology Kharagpur
Chemical Engineering Journal | Year: 2011

This work presents a theoretical and experimental investigation on the absorption of CO2 into piperazine (PZ) activated aqueous N-methyldiethanolamine (MDEA) solvent. A comprehensive mathematical model which is based on Higbie's penetration theory has been developed to analyze the experimental data. The model involving coupled mass transfer-reaction kinetics-chemical equilibrium incorporates the important reversible reactions in the liquid phase. The model is validated with the experimental results of steady state absorption measurements of CO2 in a 2.81×10-2m o.d. stainless steel wetted wall contactor. The rates of absorption of CO2 into this solvent have been measured over the CO2 partial pressure range of 2-14kPa and temperature range of 298-313K under atmospheric pressure. The absorption experiments are performed over the MDEA concentration range of 1.89-2.41kmolm-3 along with PZ concentrations of 0.24, 0.60 and 0.95kmolm-3. The predicted absorption rates and enhancement factors based on the model have been found to be in good agreement with the experimental results, the average absolute deviation between the model predicted and experimental results being 6.8%. The values of the rate constants, k23 and k25 for the PZ-carbamate and PZ-dicarbamate formation reactions determined in this work have been found to be about 17,500m6kmol-2s-1 and 15,500m6kmol-2s-1 at 298K, respectively. Good agreement between the model predicted and experimental results validates the mathematical model developed in this work to represent CO2 mass transfer in PZ activated aqueous MDEA. © 2011 Elsevier B.V.

The objective of the work is to investigate the classification of different movements based on the SEMG pattern recognition method. The testing was conducted for four arm movements using several experiments with artificial neural network classification scheme. Six time domain features were extracted and consequently classification was implemented using back propagation neural classifier (BPNC). Further, the realization of projected network was verified using cross validation (CV) process; hence ANOVA algorithm was carried out. Performance of the network is analyzed by considering mean square error value. A comparison was performed between the extracted features and back propagation network results reported in the literature. The concurrent result indicates the significance of proposed network with classification accuracy (CA) of 100% recorded from two channels, while analysis of variance technique helps in investigating the effectiveness of classified signal for recognition tasks. © 2016 Elsevier GmbH. All rights reserved.

Sandeep,Krishna Institute of Engineering and Technology | Kumar S.,National Institute of Technology Kurukshetra | Dwivedi V.K.,GCET
Desalination | Year: 2015

In this present study an attempt has been made to enhance the productivity of a basin type single slope active solar still with improved condensation technique. A new design having additional condensing cover has been proposed and study of its performance was carried out throughout the year. Due to extra condensing surface, higher yield was observed as compared to conventional single slope still. It was experimentally found that water depth, shading on condensing surface and material of extra condensing surface have significant roles in the distillate output of the proposed new design. The yield of the proposed solar still was found to be 3.015kg/m2/day on a particular day in April '12 which was about 25% more than that of a conventional solar still running in parallel under the same climatic conditions. This paper also aimed at finding an optimum design condition of a new model for better productivity. Additional increment in yield up to 14.5% was also observed with further modifications in the design. © 2015 Elsevier B.V.

Shankar H.,G.C.E.T | Singh V.,G.C.E.T
3rd International Conference on Signal Processing and Integrated Networks, SPIN 2016 | Year: 2016

Joint PDF of fading distributions has been presented in a number of literatures. However, the user in indoor wireless experiences lesser discrete scattering values, at the most one or two. In such a scenario, two waves with diffuse power (TWDP) distribution are more suitable to characterize the shadowing. This paper proposes, joint probability density function (PDF) for indoor scenario; based on TWDP distribution. The small scale fading is characterized by Rayleigh distribution and TWDP distribution is used to model the shadowing. The results are novel and in the closed form. However, similar results are presented considering Rician fading in place of proposed Raleigh based model. But results are not in closed from. © 2016 IEEE.

Kumar A.,G.C.E.T | Singh S.P.,G.C.E.T
3rd International Conference on Signal Processing and Integrated Networks, SPIN 2016 | Year: 2016

A new communication paradigm known as Nano Communication (NC) makes the things more powerful in a much smaller size. Noise and fading are two important impairment of any wireless communication system. Recently, CM1 scenario is proposed to model the fading in NC system. On the other hand, only traditional noise i.e. AWGN is taken for analysis of NC. This research paper introduces a novel noise, AWGGN to model noise in NC. Based on the novel noise model, closed form expression of CEP is proposed. Further, using proposed CEP, ABEP over proposed composite fading channel is presented. Also, ABEP over MG fading channel is presented. As per our best knowledge results are novel and never reported in the literature of nano communication system. © 2016 IEEE.

Chackochan R.,ME Communication | Soni H.,GCET
ICECT 2011 - 2011 3rd International Conference on Electronics Computer Technology | Year: 2011

Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. OFDM modulation schemes offer many advantages for multicarrier transmission at high data rates over time dispersive channels, particularly in mobile applications. One of the main issues of OFDM is high Peak-to-Average Power Ratio (PAPR) of the transmitted signal which adversely affects the complexity of power amplifiers. SeLected Mapping (SLM) technique is one of the promising PAPR reduction techniques for OFDM. This paper analyzes the capability of the existing SLM technique in reducing the effect of Peak-to-Average Power Ratio. The approach is very flexible and works with arbitrary numbers of subcarriers and without restriction on the type of modulation applied in them. The analysis is on a network model designed by WLAN 802.11a standard using MATLAB, a mathematical simulation software tool. As a performance measure for the PAPR reduction, we study the probability that the PAPR of an OFDM data block exceeds a given threshold, which is the Complementary Cumulative Distribution Function (CCDF) of PAPR. © 2011 IEEE.

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