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 …

Historical perspective of free space optical communications: from the early dates to today's developments

AB Raj, AK Majumder - Iet Communications, 2019 - Wiley Online Library
This survey article discusses the revolutions of wireless communication technologies right
from the prehistoric man's fire signals to today's space optical communications. A brief …

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 …

[图书][B] FPGA-based embedded system developer's guide

AAB Raj - 2018 - taylorfrancis.com
The book covers various aspects of VHDL programming and FPGA interfacing with
examples and sample codes giving an overview of VLSI technology, digital circuits design …

Data acquisition and signal processing system for CW Radar

HC Kumawat, AB Raj - 2019 5th International Conference On …, 2019 - ieeexplore.ieee.org
The purpose of this work to develop simple and effective data acquisition and signal
processing algorithm for radar system. Except hardware, data acquisition and signal …

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 …

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 …

Estimation of heart rate and respiratory rate using imaging photoplethysmography technique

N Singh, AAB Raj - 2020 International Conference on System …, 2020 - ieeexplore.ieee.org
Imaging-Photoplethysmography has gathered a great amount of recognition in recent
decades given to its simple, cost effective and non-contact multiparameter measurement …