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 …

Free-space optical communication link with shape-invariant orbital angular momentum Bessel beams

N Mphuthi, L Gailele, I Litvin, A Dudley, R Botha… - Applied …, 2019 - opg.optica.org
We present an alternative orbital angular momentum (OAM) solution for free-space optical
communications in the form of shape-invariant Bessel beams. We use a generalized …

[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 …

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 …

Improved direction of arrival estimation using modified MUSIC algorithm

MM Gunjal, AAB Raj - 2020 5th International Conference on …, 2020 - ieeexplore.ieee.org
An estimation of the Direction of Arrival (DOA) is useful for direction-finding and locating the
direction of incoming radio waves. The Multiple Signal Classification (MUSIC) algorithm is …

Performance analysis of free space optical communication in open‐atmospheric turbulence conditions with beam wandering compensation control

AB Raj Anthonisamy, P Durairaj… - IET …, 2016 - Wiley Online Library
Among various atmospheric effects, beam wandering is the main cause for the major power
loss in free space optical communication (FSOC) which cannot be resolved without …

Pulse doppler processing-a novel digital technique

P Anju, AAB Raj, C Shekhar - 2020 4th International …, 2020 - ieeexplore.ieee.org
The deployment of pulse-Doppler radar becomes significant to have improved target's range
details/resolution and velocity profile. The computation associated with the process of …

Experimental study of sand-storm effect on digital fso communication link

S De, AAB Raj - … International Conference on Recent Trends on …, 2020 - ieeexplore.ieee.org
Over the last two decades, Free Space Optical (FSO) communication has become more and
more interesting topic of research, as an alternative to radio frequency communication. In …