Ahmad elBanna

Benha University · Department of Electrical Engineering (Faculty of Engineering at Shoubra)

In contrast to the long-held belief that wireless systems can only work in half-duplex mode, full-duplex (FD) systems are able to concurrently transmit and receive information over the same frequency bands to theoretically enable a twofold increase in spectral efficiency. Despite their significant potential, FD systems suffer from an inherent self-...

p> Reconfigurable intelligent surface (RIS), nonorthogonal multiple access (NOMA), and underwater optical wireless communication (UOWC) are paradigms of technologies that drive the development of next generation communication systems. In this paper, we investigate the performance of a NOMA-based RIS-assisted hybrid radio frequency (RF) UOWC system....

p> Reconfigurable intelligent surface (RIS), nonorthogonal multiple access (NOMA), and underwater optical wireless communication (UOWC) are paradigms of technologies that drive the development of next generation communication systems. In this paper, we investigate the performance of a NOMA-based RIS-assisted hybrid radio frequency (RF) UOWC system....

The combination of power line communications (PLC) and radio frequency (RF) is essential for implementing new applications in smart grid and vehicular communications. In this paper, we propose a non-orthogonal multiple access (NOMA) based dual-hop hybrid wireless-power line communication (PLC) system with a decode-and-forward relay. The wireless ch...

Reconfigurable intelligent surface (RIS), non-orthogonal multiple access (NOMA), and underwater optical wireless communication (UOWC) are paradigms of technologies that drive the development of next generation communication systems. In this paper, we investigate the performance of a NOMA-based RIS-assisted hybrid radio frequency (RF)-UOWC system. T...

The hybrid combination between underwater optical wireless communication (UOWC) and radio frequency (RF) is a vital demand for enabling communication through the air-water boundary. On the other hand, non-orthogonal multiple access (NOMA) is a key technology for enhancing system performance in terms of spectral efficiency. In this paper, we propose...

Full-duplex (FD) systems have been introduced to provide high data rates for beyond fifth-generation wireless networks through simultaneous transmission of information over the same frequency resources. However, the operation of FD systems is practically limited by self-interference (SI), and efficient SI cancelers are sought to make the FD systems...

p>Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) play major roles to enhance spectrum efficiency in wireless communication systems. Besides, the AmBC provides good reinforcement for the current trend toward dispensing batteries for battery-free Internet-of-Things (IoT) devices. In this paper, we propose a symbiot...

p>Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) play major roles to enhance spectrum efficiency in wireless communication systems. Besides, the AmBC provides good reinforcement for the current trend toward dispensing batteries for battery-free Internet-of-Things (IoT) devices. In this paper, we propose a symbiot...

p>Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) play major roles to enhance spectrum efficiency in wireless communication systems. Besides, the AmBC provides good reinforcement for the current trend toward dispensing batteries for battery-free Internet-of-Things (IoT) devices. In this paper, we propose a symbiot...

The mixture of wireless and power line communications (PLC) is vital for implementing new applications in smart grid and vehicular communications. In this work, we investigate the performance of non-orthogonal multiple access (NOMA) based dual-hop hybrid communication systems with decode-and-forward relay. The wireless channel is characterized by N...

Wider adoption of machine learning methods in water resources has the potential to greatly accelerate the efficiency and quality of analysis. The Nile River is one of the major fluvial hydro-systems in the world. Fluvial islands are present in nearly all natural and regulated rivers. The Nile River is characterized by numerous natural phenomena and...

Researchers are seriously investigating new technologies to improve the performance of wireless communication systems. Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) are examples of these promising technologies. They play major roles to enhance spectrum efficiency. Besides, the AmBC provides good reinforcement fo...

Noise uncertainty is the most crucial issue that affects the cognitive radio spectrum sensing process. The majority of robust wideband spectrum sensing approaches employ a fixed threshold determined by the amount of noise. These sensing approaches are not accurate since the noise is unpredictable. In this work, a novel spectrum sensing framework wa...

In-band full-duplex (FD) technology has protruded as one of the most promising solutions for spectrum scarcity, by allowing users to transmit and receive simultaneously at the same center frequency. However, the FD systems suffer from a severe self-interference (SI) caused by the coupling between the transmit and receive antennas. Thereby, the pote...

In this work, we investigate the performance of spectrum sharing in underlay cognitive-radio (CR) inspired non-orthogonal multiple-access (NOMA) systems, at which a primary transmitter with a weak channel shares its spectrum with a secondary transmitter with a strong channel to promote the network spectrum efficiency. In this paper, we derive close...

Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) have gained a lot of interest as key enabling technologies in wireless communications systems. NOMA is a key player for enhancing spectrum utilization either by multiplexing multiple messages for the same user or allowing multi-users access, while AmBC shows great po...

Non-orthogonal multiple access (NOMA) and ambient backscatter communication (AmBC) have gained a lot of interest as key enabling technologies in wireless communications systems. NOMA is a key player for enhancing spectrum utilization either by multiplexing multiple messages for the same user or allowing multi-users access, while AmBC shows great po...

Full-duplex (FD) systems have been introduced to provide high data rates for beyond fifth-generation wireless networks through simultaneous transmission of information over the same frequency resources. However, the operation of FD systems is practically limited by the self-interference (SI), and efficient SI cancelers are sought to make the FD sys...

Non-orthogonal multiple access (NOMA) has been investigated to support massive connectivity for Internet-of-things (IoT) networks. However, since most IoT devices suffer from limited power and decoding capabilities, it is not desirable to pair a large number of devices simultaneously, which encourages two-user NOMA grouping. Additionally, most exis...

The application of device-to-device (D2D) technology has increased recently to cover various types of communication networks due to its potential improvements in system throughput and energy efficiency. The integration between D2D and Wireless Sensor Networks (WSN) in the Unlicensed spectrum (D2D-U), allows D2D users to transmit and receive on the...

Underwater channels are considered challenging media in communication due to the harsh nature of such environments. However, dynamic transmission can assist in finding sub-optimal solutions by adaptively changing the employed techniques, e.g., the forwarding scheme between nodes, modulation methods, coding parameters (e.g., coding rate), and the tr...

The physical properties of seawater include two main parts, the first one is the “thermodynamic properties” such as water density and freezing point, while the second part is the “transport properties” like the electrical conductivity and viscosity [9]. In this chapter, we will discuss the key seawater’s physical variables that have direct and indi...

Diverse underwater environments cause many impediments for underwater communication. One significant challenge is determining the nodes’ locations. The diffuse trend in underwater positioning algorithms employs a constant predetermined speed of sound; however, the underwater speed of sound fluctuates with the change of water physical properties. In...

Various machine learning (ML) techniques have been widely used in different layers of communication systems. ML techniques could provide intelligent functions that adaptively exploit the wireless resources, optimize the network operation, and guarantee the QoS needs in real-time applications [4, 7]. Moreover, ML techniques extend their existence an...

Underwater is a harsh and dynamic environment. Its physical properties are unsteady in the space-time domain and that complicates the communication process inside the water. Moreover, underwater transmissions suffer from many attenuations and scattering sources due to several environmental noises such as shipping, turbulence, wave dynamics, and the...

The main challenge that faces the IoUT is the nature of the media or the underwater environment characteristics. The lack of having a specific or standard underwater channel model (opposed to various empirical and analytical models for terrestrial channels) leads to more technical challenges. In this chapter, we examine the open challenges from the...

Non-orthogonal multiple access (NOMA) has been investigated to support massive connectivity for Internet-of-things (IoT) networks. However, since most IoT devices suffer from limited power and decoding capabilities, it is not desirable to pair a large number of devices simultaneously, which encourages two-user NOMA grouping. Additionally, most exis...

Inefficient utilization of the authorized spectrum emerges cognitive radio (CR) as a hopeful technology for both present and future telecommunications. It is owing to the potency to leverage the obtainable bandwidth of other wireless communication networks and thereby increase its occupancy. The key feature for the cognitive radio system for distin...

This book discusses how machine learning and the Internet of Things (IoT) are playing a part in smart control of underwater environments, known as Internet of Underwater Things (IoUT). The authors first present seawater’s key physical variables and go on to discuss opportunistic transmission, localization and positioning, machine learning modeling...

Node localization is one of the major challenges that exist in underwater networks. Various techniques exist for terrestrial communication while few of them are applicable in underwater communication due to the dynamic characteristic of the underwater channels e.g. the lack of GPS coverage under the water surface. Moreover, assorted environmental p...

Achieving high throughput is the most important goal of cognitive radio networks. The main process in cognitive radio is spectrum sensing that targets getting vacant channels. There are many sensing methods like matched filter, feature detection, interference temperature and energy detection which is employed in the proposed system; however, energy...

Self-interference (SI) is considered as a main challenge in full-duplex (FD) systems. Therefore, efficient SI cancelers are required for the influential deployment of FD systems in beyond fifth-generation wireless networks. Existing methods for SI cancellation have mostly considered the polynomial representation of the SI signal at the receiver. Th...

Self-interference (SI) is considered as a main challenge in full-duplex (FD) systems. Therefore, efficient SI cancelers are required for the influential deployment of FD systems in beyond fifth-generation wireless networks. Existing methods for SI cancellation have mostly considered the polynomial representation of the SI signal at the receiver. Th...

Wireless Sensors Networks (WSN) are one of the widespread but challenging wireless technologies. Two typical challenges in WSN, i.e., energy consumption and coverage area, are considered recently to enhance the performance of WSN. In this paper, we present a combination of two technologies towards an efficient WSN; we are using Wake-up Receiver (WU...

Cognitive Radio Sensor Network (CRSN) is an advanced wireless communication paradigm, which overcomes the limitation energy and bandwidth constraints for the conventional Wireless Sensor Network (WSN) by avoiding overcrowded transmission bands. Sensor nodes in CRSN function as secondary users, providing opportunistic access to unoccupied channels f...

The high demand for wireless sensor networks (WSNs) is growing in different applications. Most WSNs use the unlicensed band (ISM band) which leads to congestion in that band. On the other hand, without damaging the quality of service (QoS) of the network, minimizing the consumed energy is vital in sensor networks design. Cognitive radio-based wirel...

Underwater is a harsh and dynamic environment. Its physical properties are unsteady in the space-time domain and that complicates the communication process inside the water. Moreover, underwater transmissions suffer from many attenuations and scattering sources due to several environmental noises such as shipping, turbulence, wave dynamics, and the...

p>Sensing the existence or absence of primary user is the major chore of cognitive radio networks. Nevertheless, Spectrum sensing is the core process of cognitive radio and with target to find idle channels.Various detection techniques exist, however, energy detection is considered as the most used detector because of its lower computational cost....

The pursuit of tiny computing and sensor devices become a big challenge in the Internet-of-Things (IoT) era. The process of powering such small-size wireless nodes becomes more difficult as the battery adds extra weight, size, and cost. Additionally, batteries replacement is impractical for the expected massive IoT connectivity especially in inacce...

Multi-hop communication has attracted a lot of attention recently due to its ability to extend the coverage range and to overcome blockage. In this letter, we propose a machine learning-based selection approach that adaptively chooses the best forwarding scheme in hybrid multi-hop dense networks. The proposed transmission scheme employs a multi-lay...

Vehicular communications in intelligent transportation system (ITS) promise to improve traffic efficiency, road utilization, and safety. Achieving secure vehicular communications is vital for the deployment of vehicle-to-everything (V2X) applications. This article provides a comprehensive overview of physical-layer security (PLS) strategies employe...

Underwater channels are considered challenging media in communication due to the harsh nature of such environments. However, dynamic transmission can assist in finding sub-optimal solutions by adaptively changing the employed techniques, e.g. the forwarding scheme between nodes and the transmitted signal intensity control, to compromise for the ins...

DVB-T2 employs multiple antenna techniques and error protection coding as part of its key technologies that enhance its performance and increase the capacity by 30% over its predecessor. It defines MISO space diversity technique as an optional part in the transmission chain along with combining LDPC with BCH codes in a Bit-Interleaved Coding and Mo...

DVB-T2 defines an optional MISO processing in its transmission chain to increase the diversity of the system with linear decoding methods such as ZF and MMSE. In this paper we propose to adapt the decoding process to choose between the simple low performance ZF decoder for non-frequency selective channels and an Adaptive K-Best Sphere Decoder (AKBS...

The second-generation terrestrial transmission system for digital television broadcasting (DVB-T2) exploits Space Frequency Block Codes (SFBC) by defining a modified Alamouti code in the frequency domain in its optional Multi Input Single Output (MISO) processing transmission. Linear decoding methods such as Zero-Forcing (ZF) and Minimum Mean Squar...

Multi-antenna processing first appeared in Digital Video Broadcasting in the 2nd generation terrestrial system DVBT2 by defining an optional MISO processing based on modified version of Alamouti codes in frequency domain. Decoding methods recommended by the DVB-T2 is the linear methods ZF and MMSE. In this paper we propose to use a modified K-Best...

Turbo codes are one of the best coding schemes for error correction because of their highest coding gain achievements. Number of iterations totally affects the turbo decoding process; it has an impact on the decoder performance, latency and power consumption. Dealing with battery-based devices requires paying attention to the battery life-time, con...