Ahmed Nor

Universitatea Națională de Știință și Tehnologie Politehnica București | UPB · Department of Telecommunications

Enormous data transfer over the Internet demand needs ultra-high-speed data rates and low latency networks, opening the door for 5G and beyond. Immigration towards high frequency bands seems to be an efficient solution due to their large swath of available spectrum. The use of the millimeter wave (mmWave) band and the visible light band, i.e., ligh...

5G and beyond networks are key technologies for realizing high data rate applications such as 4K video streaming and virtual reality. To enable these networks, high and ultra-high bands, i.e., millimeter wave (mmWave) and light fidelity (Li-Fi), with theirs wide range of unlicensed spectrum can be auspicious choice but both face serious technical i...

Implementing intelligent reflecting surfaces (IRSs), in high frequency based beyond 5G networks, has become a necessity to overcome the harsh blockage issues that exist in these bands. IRSs can supply user equipment (UEs) with multi alternative virtual line of sight (LOS) links, hence enhancing the spectral efficiency (SE) of the system. As a resul...

mmWave communication is considered a major player for 5G and beyond networks due to its wide unlicensed bandwidth. However, it comes with some challenges such as propagation and penetration losses. To overcome these issues, antenna beamforming is adopted. But it is difficult to estimate massive mmWave multiple input multiple output channel for acti...

In this paper, we design a positioning information (PI) based codebook (PI-CB) for reconfigurable intelligent surface (RIS) passive beamforming (PBF), in online stage. In which, corresponding to each reflection pattern (RP), the current user equipment (UEs) PI, which are widely and easily available in communication networks, are stored. Moreover, f...

Every year, humanity loses about 1.5 million persons due to diabetic disease. Therefore continuous monitoring of diabetes is highly needed, but the conventional approach, i.e., fingertip pricking, causes mental and physical pain to the patient. This work introduces painless and cheaper non-invasive blood glucose level monitoring, Exploiting the adv...

Recently, reconfigurable intelligent surfaces (RISs) aided millimeter wave (mmWave) and terahertz (THz) communication systems have attracted interest as enablers for 5G and beyond networks. Although the static blockers impact can be eliminated by the optimal deployment of RISs, the effect of dynamic and self-blockage can only be reduced. First, due...

Recently, reconfigurable intelligent surfaces (RISs) have been exhibited as a promising candidate for sixth generation (6G) wireless networks. Moreover, the concept of index modulation (IM) and its variants as spatial modulation (SM), has been adapted as another solution to improve the spectral efficiency (SE) and the energy efficiency (EE) for the...

In this article, we propose a new RIS passive beamforming scheme in two main stages. First, a fingerprint-based codebook (FP-CB) design phase occurs, where the area of interest is divided into a number of points and the optimal reflection patterns (RPs) corresponding to these points are determined and stored alongside the coordinates of these point...

Recently, reconfigurable intelligent surface (RIS) has immensely been deployed to overcome blockage issue and widen coverage for enabling superior performance 6G networks. Mainly, systems use RIS as an assistant to redirect the transmitter (TX) incident signal towards the receiver (RX) by configuring RIS elements amplitudes and phase shifts in a pa...

Aerial reconfigurable intelligent surface (ARIS), is an intelligent reflecting surface (IRS) mounted by unmanned aerial vehicle (UAV), represent a promising candidate for assisting device to device (D2D) millimeter wave (mmWave) communication in temporal and urgent situations, e.g., open-air events. IRS can efficiently mitigate the high blockage im...

Mobile Internet of Things (MIoTs), a promising 5G network application, has begun attracting attention from academia and industry. MIoTs use various sensors and wireless communication protocols. By adopting sophisticated technologies, people are leveraging IoTs to facilitate their tasks. In today's IoT devices, the mobility of the nodes is one of th...

The usage of unmanned aerial vehicles (UAVs) is considered a new technological trend able to solve some challenges of the modern society as dedicated transportation, fast delivery, earth observation, smart agriculture and many others. But there are some challenges related to this fast development: air traffic monitoring, privacy assurance in some s...

Several use cases appear with 5G and beyond networks such as enhanced mobile broadband (eMBB), where ultra-high data rates and low-latency connections become essential demands for asymmetric services, e.g., 8K video streaming and virtual reality (VR). The millimeter-wave (mmWave) band can be a promising player to handle these applications under the...

Intelligent reflecting surfaces (IRSs) became, during the last few years a major player in beyond 5G networks because it can assist millimeter wave and terahertz transmissions to overcome their propagation and blockage issues. IRSs provide the network with alternative line of sight paths and extend the network coverage. However, deploying a single...

Millimeter wave (mmWave) will play a significant role as a 5G candidate in facing the growing demand of enormous data rate in the near future. The conventional mmWave standard, IEEE 802.11ad, considers establishing only one mmWave link in wireless local area network (WLAN) to provide multi Gbps data rate. But, mmWave has a tenuous channel which hin...

Millimeter wave (mmWave) based 5G networks have nowadays attracted researcher from both industry and academia. Because, mmWave can enable dominant 5G services such as ultra-high definition video streaming and virtual reality, by providing them with their requirements, e.g., high data rate and low latency time. But, mmWave channel dynamically change...

millimeter wave (mmWave) will play a significant role as a 5G candidate in facing the growing demand of enormous data rate in the near future. The conventional mmWave standard, IEEE 802.11ad, considers establishing only one mmWave link in wireless local area network (WLAN) to provide multi Gbps data rate. But, mmWave has a tenuous channel which hin...

Human blockage is one of the key challenges that limit the ability of mm Wave communications to provide ultra-high data rate and ultra-low latency links, thus severely reducing the quality-of-service (QoS) experienced by the users. In this paper, we present the most common human body blockage models, which are used in blockage analysis to predict t...

Intelligent reflecting surfaces (IRSs) became, during the last few years a major player in beyond 5G networks because it can assist millimeter wave and terahertz transmissions to overcome their propagation and blockage issues. IRSs provide the network with alternative line of sight paths and extend the network coverage. However, deploying a single...

Internet of things (IoT) and tactile internet applications are widely spread recently. Also, enormous speed communication networks become a persistent need nowadays due to the huge traffic demand. Hence, researchers direct their interest towards 5G networks to tackle these needs. Immigration to millimeter Wave (mmWave) band, i.e., 60 GHz band, seem...

Millimeter wave (mmWave) is a promising technology nowadays because it provides users with ultra-high data rate links with low latency time. Hence, internet of things, tactile internet and cloud computing applications which becomes an essential matter in 5G networks can be supported using it. mmWave standard, IEEE 802.11 ad, proposed using schedule...

This paper presents a comparative study on millimeter wave (mmWave) location-based analog beamforming (BF) techniques based on channel estimation. Localization and compressive sensing (CS) effectively reduces mmWave BF complexity and enhance the performance of mmWave system comparable to the conventional mmWave analog BF techniques. BF techniques b...