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Kolkata, India

Ghosh K.,Mody University of Science and TechnologyRajasthan | Das P.K.,RCCIIT | Neogy S.,Jadavpur University
Advances in Intelligent Systems and Computing | Year: 2016

Lifetime of a multi-sink wireless sensor network (WSN) may increase considerably when data aggregation is introduced in a Fermat point based routing protocol. However, data aggregation should come with a cost of delay in packet forwarding time. It has been seen that increasing the transmission distance could increase the network lifetime. However, our observation shows that after a certain point, lifetime readings of the network would dip for a distance vector type of protocol. Thus, it becomes necessary to choose an appropriate aggregation factor and transmission radius depending upon the requirement of the application for which the WSN has been installed. In this paper we have presented a Fermat point based data aggregating protocol which is distance vector protocol in nature. We have compared its lifetime with some other Fermat point based protocols and studied the effect of aggregation factor on cumulative delay for packet forwarding. Moreover, effect of increased transmission radius on the lifetime of the proposed protocol too was studied. © Springer India 2016. Source

Ghosh A.,RCCIIT | Jain A.,Jadavpur University | Singh N.B.,Manipur University | Sarkar S.K.,Jadavpur University
Journal of Computational and Theoretical Nanoscience | Year: 2015

This paper deals with the single electron threshold logic gate based programmable logic array design and different performance related issues. The main concern of this work is the reliability aspects in presence of randomly distributed background charges and under consideration of different shapes of island. Two types of distribution, namely normal and uniform distribution has been taken into consideration to analyze the reliability of the complete circuit along with the effects from individual logic gates. Regarding island shape circular disc and sphere shaped island have been considered. The work also focuses on the power consumption, time delay estimations and tunneling rate determination to estimate the performance of the designed circuit. The effect of error probability on the propagation delay of the designed circuit is thoroughly investigated. The reliability analysis reveals that the better percentage reliability of the complete circuit is achieved with the normal distribution of background charges. The stability of the designed circuit has been tested using SIMON. All the points corresponding to the control input vectors are found to be located in the stable white portion of the stability plot. Through the simulated stability plots the stable operation of the circuit is also explained. © 2015 American Scientific Publishers All rights reserved. Source

Ghosh K.,University of Rajasthan | Das P.K.,RCCIIT | Neogy S.,Jadavpur University
Advances in Intelligent Systems and Computing | Year: 2015

Data aggregation has been used as a prominent technique for lifetime enhancement of wireless sensor networks (WSN) for quite some time. Data aggregation reduces total number of transmissions in a WSN. Since transmitting energy is the most prominent component of energy consumption in a WSN, data aggregation reduces energy expenditure of the network and thereby enhances network lifetime. The nature of aggregation, however, may vary from one application to another. Along with this, the way source nodes are selected for transmission has an effect on the energy depletion and lifetime of the nodes. In this paper, we have studied the effect of certain non-electrical factors such as source selection, deployment pattern, packet size, and data forwarding technique on the performance of aggregation of a multi-sink WSN with varying degrees of aggregation. © Springer India 2015. Source

Mondal U.,RCCIIT | Sengupta A.,IIEST
Proceedings of 6th IEEE Power India International Conference, PIICON 2014 | Year: 2014

The objective of this work is to validate the servo mechanism property of Repetitive Control (RC) system for periodic reference input in the presence of disturbance and in the presence of time varying parametric uncertainty. The ways of design and implementation of repetitive control system is demonstrated in steps. A similar test have been made having conventional PI-control and compared with RC based P control. Comparisons in terms of performances in both time and frequency (using bode plot) domain are done to show the effectiveness of the RC over the traditional idea. © 2014 IEEE. Source

Ghosh A.,RCCIIT | Sen S.,PTC | Dey C.,University of Calcutta
2nd International Conference on Signal Processing and Integrated Networks, SPIN 2015 | Year: 2015

Servo control systems are very popular in process automation. Towards achieving and maintaining the desired speed in close-loop application, fuzzy controllers are more competent in comparison with their conventional counterparts. Based on the prior knowledge, a rule-base is designed here comprising of forty-nine if-then rules using simple triangular membership functions. The non-linear behaviour of such servo systems can also be efficiently managed by proper designing of rule-base with appropriate choice of scaling factors. Superiority of the designed fuzzy PI controller is verified through simulation study on a servo speed control system and in addition it is successfully implemented in real-time on a hardware setup. © 2015 IEEE. Source

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