Ph.D. Supervision

'Development of Fuzzy Logic Based Improved Schemes for Wireless Sensor Networks', Dr. Ashutosh Kumar Singh, Awarded in March 2014.

Fuzzy logic based schemes were developed for clustering and other important tasks of WSN. The performance of these schemes was compared with other alternative approaches.Further, the applications of WSNs with movable sink were explored. The fuzzy logic based schemes with various plausible movements for such type of WSNs were developed and their performance analysis was done.

'Efficient Data Delivery Schemes Using Network Coding for Wireless Networks', Mr. Purnendu Shekhar Pandey, the thesis is to be submitted shortly.

The applications like live streaming of television, news, sports etc. over wireless networks require delivering exactly same data to several mobile stations (MSs). This feature underlines the inefficiency of standard ‘dedicated channel scheme’ for delivering data from an access point (AP) to each MS. The alternatives as available in the literature are also found to be either impracticable or inefficient, thus, in this research work we aimed to develop efficient data delivery schemes for aforesaid applications. The principles of graph theory, Network Coding (NC) theory and assistance of MSs are used in developing novel schemes for delivering data to the MSs which belongs to the AP. In particular, a ‘Matroid based approach’ and a ‘Clique based approach’ are developed. Accordingly, suitable NC strategies are determined and the data packets as available at AP are distributed among the nodes with instructions of local level sharing in the graph such that all packets should become available at all MSs. It is observed that the proposed schemes are more effective for larger graphs, but in practical wireless networks the coverage of APs is very small which limits the number of interested MSs thus the size of the graphs. Hence, a scheme has been developed such that the neighbour APs may coordinate to build a single graph for all MSs which are attached to any of these APs and workout a combined NC for local sharing of the data. The performance of the proposed data delivery schemes has been tested using NS-3 simulator. Significant improvements over the competitive approaches have been observed and reported in the thesis.

'Study of Rate Conversion Filtering for Cognitive Radio', Mr. Abhishek Kumar, Ongoing.

Cognitive radio technology involves reliable data transmission over dynamically available spectrum bands of different bandwidths. It requires spurious transient free rate conversion filters which should have lower computational complexity too. Development of a novel rate conversion filter which should meet the aforesaid requirements of cognitive radio is the primary aim of this research work. Its scope includes the exploration of spectrum blind sampling and other relevant techniques which contribute in improving the overall performance of the cognitive radio technology. The outcome of this research can enhance the commercial viability of the cognitive radio technology.

'Performance Evaluation and Optimization of Cellular Two-Way Relay Networks with Spatial Diversity', Mr. Mahendra Shukla, Ongoing (Dr. Suneel Yadav is another Supervisor)

The aim is to evaluate and optimize the performance of two- way AF relay in cellular context under various fading channels. With this, we will analyze several performances measure such as outage probability, symbol error rate and ergodic sum-rate. In addition we will optimize the system performance by optimizing the several factors such as power allocation, relay location, joint power allocation and traffic asymmetric parameter. 

'Explication of SAR Polarimetry and its applications', Ms. Nidhi Verma, ongoing. (Dr. Pooja Mishra is another Supervisor)

This research aims to contribute in improving the Synthetic Aperture Radar Polarimetry technology and to explore new applications wherein this technology can be used for gaining some useful information.

'Design of quantum gates by interacting quantum elactromagnetic field by N-level atom having NXN hemiltonion matrix with a small random perturbation' Ms. Preeti Kharwar, ongoing. (Prof. Harish Parthasarathy, NSIT New Delhi is another Supervisor)

This research aims to contribute in the possible development of a computer which should follow the quantum principles.

Associate Professor, IIIT Allahabad
President, IIITA Employee Welfare Society