A review–unguided optical communications: Developments, technology evolution, and challenges

AAB Raj, P Krishnan, U Darusalam, G Kaddoum… - Electronics, 2023 - mdpi.com
This review paper discusses the complete evolution of free-space optical (FSO)
communication, also known as unguided optical communication (UOC) technologies, all the …

Application of DNN for radar micro-doppler signature-based human suspicious activity recognition

M Chakraborty, HC Kumawat, SV Dhavale - Pattern Recognition Letters, 2022 - Elsevier
The non-availability of open-source datasets covering various human suspicious activities
and well-trained deep learning (DL) architecture limits the effective utilization of DL network …

DIAT-μ RadHAR (micro-doppler signature dataset) & μ RadNet (a lightweight DCNN)—For human suspicious activity recognition

M Chakraborty, HC Kumawat, SV Dhavale… - IEEE Sensors …, 2022 - ieeexplore.ieee.org
In the view of national security, radar micro-Doppler (mD) signatures-based recognition of
suspicious human activities becomes significant. In connection to this, early detection and …

SP-WVD with adaptive-filter-bank-supported RF sensor for low RCS targets' nonlinear micro-Doppler signature/pattern imaging system

HC Kumawat, AAB Raj - Sensors, 2022 - mdpi.com
In this study, the authors present the accurate imaging of the behavior of simultaneous
operations of multiple low radar cross-section (RCS) aerial targets. Currently, the popularity …

Extraction of Doppler signature of micro‐to‐macro rotations/motions using continuous wave radar‐assisted measurement system

HC Kumawat, A Bazil Raj - IET Science, Measurement & …, 2020 - Wiley Online Library
Mechanical–structural vibration and/or rotational parts of the targets will induce micro‐
Doppler frequency in addition to the main Doppler components. In the today's military era …

Photonics radar based LSS targets' postures' mD and cadence frequency imaging using empirical wavelet transform technique

N Akhter, AAB Raj, K Prabu - The Imaging Science Journal, 2024 - Taylor & Francis
Developing a photonics radar to detect the combined multiple simultaneous-
behaviours/postures of low-slow-small (LSS) aerial targets and appropriately extracting their …

Development of RF-photonic system for automatic targets' nonlinear rotational/flapping/gliding signatures imaging applications

N Akhter, HC Kumawat… - Journal of Circuits …, 2023 - World Scientific
Nowadays, developing the radio frequency (RF)-photonic sensors suitable for several
Defence and civil applications is emerging due to its various unique advantages. In today's …

Intelligent System for Real time detection and classification of Aerial Targets using CNN

M Upadhyay, SK Murthy… - 2021 5th International …, 2021 - ieeexplore.ieee.org
The advancements in drone technology has led to increased usage of drones in civil and
military which poses significant security related challenges. The small size of drones and …

Detection and classification of UAV using propeller Doppler profiles for counter UAV systems

J Mazumder, AB Raj - 2020 5th International Conference on …, 2020 - ieeexplore.ieee.org
The purpose of this paper is to develop an electronic system which detects and classifies an
Unmanned Aerial Vehicle (UAV). For detection and classification of a target UAV, an X Band …

Beam steering and control algorithm for 5-18ghz transmit/receive module based active planar array

M Maddegalla, AAB Raj, GS Rao - … International Conference on …, 2020 - ieeexplore.ieee.org
With the advent of Active Electronically Scanned Array (AESA) technology in the design and
development of advanced multi-target handling Radar and Electronic Warfare (EW) systems …