Research

General research interests are in the areas of Wireless Sensor Networks (WSNs) and its application in Cyber Physical Systems (CPS), Internet of Things (IoT), and Context-aware Pervasive Systems. Current research topics include Small World Models for Development of Wireless Sensor Network Services in the context of sensor node localization, network lifetime management, time synchronization, low-latency and energy-balanced data transmission, bandwidth efficient network development, and distributed detection and estimation. Additional, research interests include Low-Power Wide Area Network (LPWAN), UAV-Assisted Edge and Fog Networks, 5G-mm Wave for IoT applications, Visible Light Communication (VLC), and Physical Layer Wireless Communication.

Ph.D. Thesis

Title: Small World Models for Development of Wireless Sensor Network Services

The primary objective of the thesis is developing novel small world models for efficient wireless sensor network services. The specific objective of the thesis is development of small world models for WSN services in the context of sensor node localization, time synchronization, data gathering, and low-latency and energy-balanced data transmission. With this, we have proposed novel small world models for the development of time synchronized, energy efficient, low-latency, and high throughput wireless sensor networks. We have developed small world wireless sensor network by introducing dual band frequency selective radio links and constraining the average path length and average clustering coefficient in a conventional wireless sensor network. In addition, we have contributed to the state of the art in sensor node localization by developing novel cooperative methods of node localization over a small world wireless sensor network. Subsequently, we have proposed new methods for joint localization and data gathering to improve the energy efficiency of a small world wireless sensor network. Further, the development of low-latency and energy-balanced data transmission schemes over a small world wireless sensor network is proposed.

M.Tech. Thesis

Title: Outage Analysis of Cooperative Wireless Transmission for Physical Layer Wireless Security

In this thesis, the outage performance of Decode-forward (DF), Amplify-forward (AF), and Incremental Amplify-forward (IAF) protocols in cooperative wireless communication is evaluated in terms of outage probability. Additionally, diversity-multiplexing trade-off for all the three protocols has been carried out. In particular, a new outage analysis for AF and IAF protocols has been carried out. Results obtained using this analysis matches with the simulated results. Performance of DF protocol will be better in case of low SNR while performance of AF protocol will be better in case of high SNR while IAF gives further better performance. Effect of increase in number of cooperating nodes equipped with single antenna is described, which indicates that as the number of cooperating nodes increases outage performance will improve. Performance of Diversity-multiplexing tradeoff also improves continuously as scheme changes from Decode-forward (DF) to Amplifyforward (AF) to Incremental amplify-forward (IAF).