Ahmed H. Elghandour
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View article: On the capacity of the AWGN channel with mixed input sources
On the capacity of the AWGN channel with mixed input sources Open
In this paper, we present an information-theoretic foundation for the index modulation (IM) systems, including an upper bound of the AWGN channel capacity with the IM input sources. To that goal, we present the Asymptotic Equipartition Pro…
View article: Compact, Energy Efficient Simultaneous Transmission of Analog and Different Digital Signals With a Single Ring Modulator
Compact, Energy Efficient Simultaneous Transmission of Analog and Different Digital Signals With a Single Ring Modulator Open
We present a compact, agnostic transmitter capable of simultaneously transmitting all types of signals (analog and digital with different modulation formats) with a single-ring modulator with a radius of 10 micrometers and a bandwidth of a…
View article: Simulation and comparative analysis of Fiber Optic Gyroscope for near-zero rotation rate measurement
Simulation and comparative analysis of Fiber Optic Gyroscope for near-zero rotation rate measurement Open
Currently, Fiber-Optic Gyroscopes (FOGs) stand as a significant leap in inertial navigation sensor technology within the field of automation, control and navigation. There has been a recent global emphasis on exploring and enhancing high-p…
View article: A Comparative Study of Fiber Optic Gyroscopes
A Comparative Study of Fiber Optic Gyroscopes Open
Inertial Navigation Systems (INS) are integral to modern technology, yet their significance often goes unnoticed. Key to an INS are Gyroscopes, which detect rotation rates. Initially mechanical, they became outdated with advancing technolo…
View article: Tight Lower Bound on Differential Entropy for Mixed Gaussian Distributions
Tight Lower Bound on Differential Entropy for Mixed Gaussian Distributions Open
In this paper, a tight lower bound for the differential entropy of the Gaussian mixture model is presented. First, the probability model of mixed Gaussian distribution that is created by mixing both discrete and continuous random variables…
View article: Unified performance parameters for IM/DD techniques over gamma-gamma fading channel with pointing errors
Unified performance parameters for IM/DD techniques over gamma-gamma fading channel with pointing errors Open
In this paper, we discuss the performance of different intensity modulation direct detection techniques (IM-DD) used in free space optical systems (FSO) under different channel impairments such as path loss, atmospheric turbulence, and poi…
View article: Orthogonal Sampling based Broad-Band Signal Generation with Low-Bandwidth Electronics
Orthogonal Sampling based Broad-Band Signal Generation with Low-Bandwidth Electronics Open
High-bandwidth signals are needed in many applications like radar, sensing, measurement and communications. Especially in optical networks, the sampling rate and analog bandwidth of digital-to-analog converters (DACs) is a bottleneck for f…
View article: Orthogonal Sampling-Based Broad-Band Signal Generation With Low-Bandwidth Electronics
Orthogonal Sampling-Based Broad-Band Signal Generation With Low-Bandwidth Electronics Open
High-bandwidth signals are needed in many applications like radar, sensing, measurement and communications. Especially in optical networks, the sampling rate and analog bandwidth of digital-to-analog converters (DACs) is a bottleneck for f…
View article: Synthesis and Characterization of Ibuprofen Delivery System Based on β-cyclodextrin/Itaconic Acid Copolymer
Synthesis and Characterization of Ibuprofen Delivery System Based on β-cyclodextrin/Itaconic Acid Copolymer Open
This study aims at preparation and characterization of drug delivery system based on grafted beta-cyclodextrin (β-CD) with itaconic acid (IA) using free-radical copolymerization technique, in the presence of N, N'-methylene bisacrylamide (…
View article: Adsorption of Cd2+ and Cr3+ ions from aqueous solutions by using residue of Padina gymnospora waste as promising low-cost adsorbent
Adsorption of Cd2+ and Cr3+ ions from aqueous solutions by using residue of Padina gymnospora waste as promising low-cost adsorbent Open
Recently, a great attention has been given for applying a low-cost and effective adsorbents instead of expensive and dangerous chemical materials as a promising approach to treat wastewater. In this work, residue powder of brown macroalga …