Search Results for author: Halim Yanikomeroglu

Found 76 papers, 0 papers with code

Realistic Channel and Delay Coefficient Generation for Dual Mobile Space-Ground Links - A Tutorial-

no code implementations7 May 2024 Hongzhao Zheng, Mohamed Atia, Halim Yanikomeroglu

Channel and delay coefficient are two essential parameters for the characterization of a multipath propagation environment.

Multi-Layer Network Formation through HAPS Base Station and Transmissive RIS-Equipped UAV

no code implementations2 May 2024 Faical Khennoufa, Khelil Abdellatif, Halim Yanikomeroglu, Metin Ozturk, Taissir Elganimi, Ferdi Kara

We also consider multiple-input single-output (MISO) technology, by employing multiple antennas at the HAPS-SMBS and a single antenna at the Internet of things devices.

Cell Switching in HAPS-Aided Networking: How the Obscurity of Traffic Loads Affects the Decision

no code implementations1 May 2024 Berk Çiloğlu, Görkem Berkay Koç, Metin Ozturk, Halim Yanikomeroglu

This study aims to introduce the cell load estimation problem of cell switching approaches in cellular networks specially-presented in a high-altitude platform station (HAPS)-assisted network.


Impact of Objective Function on Spectral Efficiency in Integrated HAPS-Terrestrial Networks

no code implementations14 Mar 2024 Afsoon Alidadi Shamsabadi, Animesh Yadav, Halim Yanikomeroglu

Integrating non-terrestrial networks (NTNs), in particular high altitude platform stations (HAPS), with terrestrial networks, referred to as vHetNets, emerges as a promising future wireless network architecture for providing ubiquitous connectivity.


Synthetic Waveform Generation for Satellite, HAPS, and 5G Base Station Positioning Reference Signal Using QuaDRiGa

no code implementations24 Jan 2024 Hongzhao Zheng, Mohamed Atia, Halim Yanikomeroglu, Paulo S. R. Diniz

Waveform generation is essential for studying signal propagation and channel characteristics, particularly for objects that are conceptualized but still need to be operational.

Strategic Client Selection to Address Non-IIDness in HAPS-enabled FL Networks

no code implementations10 Jan 2024 Amin Farajzadeh, Animesh Yadav, Halim Yanikomeroglu

The deployment of federated learning (FL) within vertical heterogeneous networks, such as those enabled by high-altitude platform station (HAPS), offers the opportunity to engage a wide array of clients, each endowed with distinct communication and computational capabilities.

Federated Learning

Towards Reliable Participation in UAV-Enabled Federated Edge Learning on Non-IID Data

no code implementations16 Dec 2023 Youssra Cheriguene, Wael Jaafar, Halim Yanikomeroglu, Chaker Abdelaziz Kerrache

Federated Learning (FL) is a decentralized machine learning (ML) technique that allows a number of participants to train an ML model collaboratively without having to share their private local datasets with others.

Federated Learning

Swarm of Robotic Aerial Base Stations for mmWave Multi-Hop Backhauling

no code implementations16 Dec 2023 Yuan Liao, Vasilis Friderikos, Halim Yanikomeroglu

Robotic aerial base stations (RABSs) that are able to anchor at tall urban landforms are expected to bring further flexibility to millimeter-wave (mmWave) multi-hop backhaul networks in highly dense urban environments.

Latency versus Transmission Power Trade-off in Free-Space Optical (FSO) Satellite Networks with Multiple Inter-Continental Connections

no code implementations8 Dec 2023 Jintao Liang, Aizaz Chaudhry, John Chinneck, Halim Yanikomeroglu, Gunes Kurt, Peng Hu, Khaled Ahmed, Stephane Martel

In the absence of satellite transmission power constraints, as the LISL range extends from the minimum feasible range of 1575 km to the maximum feasible range of 5016 km, the average total network latency decreases from 589 ms to 311 ms.

Free-Space Optical (FSO) Satellite Networks Performance Analysis: Transmission Power, Latency, and Outage Probability

no code implementations8 Dec 2023 Jintao Liang, Aizaz U. Chaudhry, Eylem Erdogan, Halim Yanikomeroglu, Gunes Karabulut Kurt, Peng Hu, Khaled Ahmed, Stephane Martel

For the Toronto--Sydney inter-continental connection in an FSOSN with Starlink's Phase 1 Version 3 constellation, when the LISL range is approximately 2, 900 km, the mean network latency and mean average satellite transmission power intersect are approximately 135 ms and 380 mW, respectively.

Data-Efficient Energy-Aware Participant Selection for UAV-Enabled Federated Learning

no code implementations14 Aug 2023 Youssra Cheriguene, Wael Jaafar, Chaker Abdelaziz Kerrache, Halim Yanikomeroglu, Fatima Zohra Bousbaa, Nasreddine Lagraa

Unmanned aerial vehicle (UAV)-enabled edge federated learning (FL) has sparked a rise in research interest as a result of the massive and heterogeneous data collected by UAVs, as well as the privacy concerns related to UAV data transmissions to edge servers.

Federated Learning SSIM

Outage Performance of Multi-tier UAV Communication with Random Beam Misalignment

no code implementations24 Jul 2023 WeiHao Wang, Zesong Fei, Jing Guo, Salman Durrani, Halim Yanikomeroglu

In particular, we propose a tractable random model to capture the impacts of beam misalignment in the 3D space.

Enhancing Next-Generation Urban Connectivity: Is the Integrated HAPS-Terrestrial Network a Solution?

no code implementations17 Jul 2023 Afsoon Alidadi Shamsabadi, Animesh Yadav, Halim Yanikomeroglu

Located in the stratospheric layer of Earth's atmosphere, high altitude platform station (HAPS) is a promising network infrastructure, which can bring significant advantages to sixth-generation (6G) and beyond wireless communications systems by forming vertical heterogeneous networks (vHetNets).


Personalized Resource Allocation in Wireless Networks: An AI-Enabled and Big Data-Driven Multi-Objective Optimization

no code implementations8 Jul 2023 Rawan Alkurd, Ibrahim Abualhaol, Halim Yanikomeroglu

As a result, the use of Artificial Intelligence (AI) is envisioned for wireless network design and optimization due to the flexibility and adaptability it offers in solving extremely complex problems in real-time.

Big-data-driven and AI-based framework to enable personalization in wireless networks

no code implementations8 Jun 2023 Rawan Alkurd, Ibrahim Abualhaol, Halim Yanikomeroglu

Thus, in this article, we propose the utilization of AI, big data analytics, and real-time non-intrusive user feedback in order to enable the personalization of wireless networks.

Multi-Tier Hierarchical Federated Learning-assisted NTN for Intelligent IoT Services

no code implementations9 May 2023 Amin Farajzadeh, Animesh Yadav, Halim Yanikomeroglu

In the ever-expanding landscape of the IoT, managing the intricate network of interconnected devices presents a fundamental challenge.

Federated Learning Management

Smart Resource Allocation Model via Artificial Intelligence in Software Defined 6G Networks

no code implementations9 Feb 2023 Ali Nouruzi, Atefeh Rezaei, Ata Khalili, Nader Mokari, Mohammad Reza Javan, Eduard A. Jorswieck, Halim Yanikomeroglu

To this end, we introduce a new metric, i. e., throughput-overhead-complexity (TOC), for the proposed machine learning-based algorithm, which supports a trade-off between these performance indicators.

Decision Making Management

FLSTRA: Federated Learning in Stratosphere

no code implementations1 Feb 2023 Amin Farajzadeh, Animesh Yadav, Omid Abbasi, Wael Jaafar, Halim Yanikomeroglu

We propose a federated learning (FL) in stratosphere (FLSTRA) system, where a high altitude platform station (HAPS) facilitates a large number of terrestrial clients to collaboratively learn a global model without sharing the training data.

Federated Learning

A Positioning System in an Urban Vertical Heterogeneous Network (VHetNet)

no code implementations24 Jan 2023 Hongzhao Zheng, Mohamed Atia, Halim Yanikomeroglu

In this paper, we demonstrate the effectiveness of gNBs in improving the vertical positioning accuracy for both the GPS-only system and the HAPS-aided GPS system by analyzing the impact of the density of gNBs and the pseudorange error of gNB on the positioning performance of the gNB augmented positioning systems.

High Altitude Platform Station (HAPS)-Aided GNSS for Urban Areas

no code implementations2 Jan 2023 Hongzhao Zheng, Mohamed Atia, Halim Yanikomeroglu

In this work, we examine the positioning performance of the High Altitude Platform Station (HAPS)-aided GPS system in an urban area via both simulation and physical experiment.

Vocal Bursts Intensity Prediction

Analysis of a HAPS-Aided GNSS in Urban Areas using a RAIM Algorithm

no code implementations2 Jan 2023 Hongzhao Zheng, Mohamed Atia, Halim Yanikomeroglu

In so doing, we examine the positioning performance of a HAPS-aided GPS system in an urban area using both a simulation and physical experiment.

On the Design of Communication-Efficient Federated Learning for Health Monitoring

no code implementations30 Nov 2022 Dong Chu, Wael Jaafar, Halim Yanikomeroglu

To tackle this problem, we propose in this paper a communication-efficient federated learning (CEFL) framework that involves clients clustering and transfer learning.

Federated Learning Transfer Learning

VHetNets for AI and AI for VHetNets: An Anomaly Detection Case Study for Ubiquitous IoT

no code implementations14 Oct 2022 Weili Wang, Omid Abbasi, Halim Yanikomeroglu, Chengchao Liang, Lun Tang, Qianbin Chen

In this article, we develop an AI-native VHetNets-enabled framework to provide the anomaly detection service for ubiquitous IoT, whose implementation is assisted by intelligent network management functionalities.

Anomaly Detection Intrusion Detection +1

Multi-Mode High Altitude Platform Stations (HAPS) for Next Generation Wireless Networks

no code implementations5 Oct 2022 Safwan Alfattani, Wael Jaafar, Halim Yanikomeroglu, Abbas Yongaçoglu

To tackle this issue, we envision the use of a multi-mode HAPS that can adaptively switch between different modes so as to reduce energy consumption and extend the HAPS loitering time.

Temporary Laser Inter-Satellite Links in Free-Space Optical Satellite Networks

no code implementations23 Aug 2022 Aizaz U. Chaudhry, Halim Yanikomeroglu

In comparison with the NG-FSOSN, the improvement in latency with the NNG-FSOSN is significant at LISL ranges of 1, 500 km, 1, 700 km, and 2, 500 km, where the improvement is 16. 83 ms, 23. 43 ms, and 18. 20 ms, respectively, for the Sydney-Sao Paulo inter-continental connection.

Resource-Efficient HAPS-RIS Enabled Beyond-Cell Communications

no code implementations23 Jul 2022 Safwan Alfattani, Animesh Yadav, Halim Yanikomeroglu, Abbas Yongacoglu

Particularly, unsupported UEs will be connected to a dedicated control station (CS) through RIS-mounted HAPS.

On Crossover Distance for Optical Wireless Satellite Networks and Optical Fiber Terrestrial Networks

no code implementations6 Jun 2022 Aizaz U. Chaudhry, Halim Yanikomeroglu

It is observed from the numerical results that the crossover distance increases with an increase in the number of hops, and this increase is higher at higher satellite altitudes in OWSNs and lower refractive indexes in OFTNs.

Link Budget Analysis for Free-Space Optical Satellite Networks

no code implementations27 Apr 2022 Jintao Liang, Aizaz U. Chaudhry, Eylem Erdogan, Halim Yanikomeroglu

The satellites in these FSOSNs will have limited energy and thereby limited power, and we investigate the effect of link distance and link margin on optical inter-satellite link transmission power, and the effect of slant distance, elevation angle, and link margin on optical uplink/downlink transmission power.

A Deep Learning-Based Approach for Cell Outage Compensation in NOMA Networks

no code implementations7 Apr 2022 Elaheh Vaezpour, Layla Majzoobi, Mohammad Akbari, Saeedeh Parsaeefard, Halim Yanikomeroglu

Cell outage compensation enables a network to react to a catastrophic cell failure quickly and serve users in the outage zone uninterruptedly.

Fairness Management

A Comprehensive Survey of Spectrum Sharing Schemes from a Standardization and Implementation Perspective

no code implementations21 Mar 2022 Mohammad Parvini, Amir Hossein Zarif, Ali Nouruzi, Nader Mokari, Mohammad Reza Javan, Bijan Abbasi, Amir Ghasemi, Halim Yanikomeroglu

As the services and requirements of next-generation wireless networks become increasingly diversified, it is estimated that the current frequency bands of mobile network operators (MNOs) will be unable to cope with the immensity of anticipated demands.

The Digital Divide in Canada and the Role of LEO Satellites in Bridging the Gap

no code implementations16 Mar 2022 Tuheen Ahmmed, Afsoon Alidadi, Zichao Zhang, Aizaz U. Chaudhry, Halim Yanikomeroglu

In 2016, the Canadian Radio-television and Telecommunications Commission announced broadband Internet as a basic service available for all Canadians.

When to Crossover from Earth to Space for Lower Latency Data Communications?

no code implementations1 Mar 2022 Aizaz U. Chaudhry, Halim Yanikomeroglu

Numerical results reveal that a higher refractive index of optical fiber (or $i$) in an OFTN and a lower altitude of satellites (or $h$) in an OWSN result in a shorter crossover distance.

NOMA Computation Over Multi-Access Channels for Multimodal Sensing

no code implementations1 Jan 2022 Michel Kulhandjian, Gunes Karabulut Kurt, Hovannes Kulhandjian, Halim Yanikomeroglu, Claude D'Amours

This, in return, suggests that our proposed scheme is eminently suitable for multimodal sensor networks.

Cooperation in Space: HAPS-Aided Optical Inter-Satellite Connectivity with Opportunistic Scheduling

no code implementations28 Dec 2021 Eylem Erdogan, Ibrahim Altunbas, Gunes Karabulut Kurt, Halim Yanikomeroglu

Issues with tracking, precision pointing, and Doppler shift are the major sources of performance loss in laser inter-satellite communication that can severely decrease the coverage and overall performance of satellite constellations.

Position Scheduling

Optical Satellite Eavesdropping

no code implementations9 Dec 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In recent years, satellite communication (SatCom) systems have been widely used for navigation, broadcasting application, disaster recovery, weather sensing, and even spying on the Earth.

UAV-based Crowd Surveillance in Post COVID-19 Era

no code implementations28 Nov 2021 Nizar Masmoudi, Wael Jaafar, Safa Cherif, Jihene Ben Abderrazak, Halim Yanikomeroglu

Consequently, we propose in this paper a complete UAV framework for intelligent monitoring of post COVID-19 outdoor activities.

Optimization of Quantized Phase Shifts for Reconfigurable Smart Surfaces Assisted Communications

no code implementations19 Nov 2021 Maximiliano Rivera, Mohammad Chegini, Wael Jaafar, Safwan Alfattani, Halim Yanikomeroglu

Reconfigurable Smart Surface (RSS) is assumed to be a key enabler for future wireless communication systems due to its ability to control the wireless propagation environment and, thus, enhance communications quality.


HAPS Selection for Hybrid RF/FSO Satellite Networks

no code implementations27 Jul 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In the first phase of transmission, the satellite selects the HAPS node that provides the highest signal-to-noise ratio (SNR).

A Weather-Dependent Hybrid RF/FSO Satellite Communication for Improved Power Efficiency

no code implementations30 Jun 2021 Olfa Ben Yahia, Eylem Erdogan, Gunes Karabulut Kurt, Ibrahim Altunbas, Halim Yanikomeroglu

In SatCom, radio-frequency (RF) or free-space optical (FSO) communications can be used depending on the communication environment.

Caching and Computation Offloading in High Altitude Platform Station (HAPS) Assisted Intelligent Transportation Systems

no code implementations28 Jun 2021 Qiqi Ren, Omid Abbasi, Gunes Karabulut Kurt, Halim Yanikomeroglu, Jian Chen

In addition, the caching technique is introduced for network edges to store some of the fundamental data from the HAPS so that large propagation delays can be reduced.


Disconnectivity-Aware Energy-Efficient Cargo-UAV Trajectory Planning with Minimum Handoffs

no code implementations27 Jun 2021 Nesrine Cherif, Wael Jaafar, Halim Yanikomeroglu, Abbas Yongacoglu

In this paper, we formulate the trajectory planning as a multi-objective problem aiming to minimize both the UAV's energy consumption and the handoff rate, constrained by the UAV battery size and disconnectivity rate.

Trajectory Planning

Optical Wireless Satellite Networks versus Optical Fiber Terrestrial Networks: The Latency Perspective

no code implementations14 Jun 2021 Aizaz U. Chaudhry, Halim Yanikomeroglu

Formed by using laser inter-satellite links (LISLs) among satellites in upcoming low Earth orbit and very low Earth orbit satellite constellations, optical wireless satellite networks (OWSNs), also known as free-space optical satellite networks, can provide a better alternative to existing optical fiber terrestrial networks (OFTNs) for long-distance inter-continental data communications.

HAPS-ITS: Enabling Future ITS Services in Trans-Continental Highways

no code implementations11 May 2021 Wael Jaafar, Halim Yanikomeroglu

To this end, high altitude platform station (HAPS) systems, due to their mobility, sustainability, payload capacity, and communication/caching/computing capabilities, are seen as a key enabler of future ITS services for trans-continental highways; this paradigm is referred to as HAPS-ITS.

Autonomous Vehicles

Securing the Inter-Spacecraft Links: Physical Layer Key Generation from Doppler Frequency Shift

no code implementations4 May 2021 Ozan Alp Topal, Gunes Karabulut Kurt, Halim Yanikomeroglu

In this work, we propose a secret key generation procedure specifically designed for the inter-spacecraft communication links.

Graph Attention Networks for Channel Estimation in RIS-assisted Satellite IoT Communications

no code implementations1 Apr 2021 Kürşat Tekbıyık, Güneş Karabulut Kurt, Ali Rıza Ekti, Halim Yanikomeroglu

Moreover, bit error rate performance is investigated for RIS designs with discrete and non-uniform phase shifts under channel estimation based on the proposed method.

Graph Attention

Laser Inter-Satellite Links in a Starlink Constellation

no code implementations26 Feb 2021 Aizaz U. Chaudhry, Halim Yanikomeroglu

Then, using satellite constellation for Phase I of Starlink, we study the effect of varying a satellite's LISL range on the number of different types of LISLs it can establish with other satellites.

DeepMuD: Multi-user Detection for Uplink Grant-Free NOMA IoT Networks via Deep Learning

no code implementations18 Feb 2021 Ahmet Emir, Ferdi Kara, Hakan Kaya, Halim Yanikomeroglu

In this letter, we propose a deep learning-aided multi-user detection (DeepMuD) in uplink non-orthogonal multiple access (NOMA) to empower the massive machine-type communication where an offline-trained Long Short-Term Memory (LSTM)-based network is used for multi-user detection.

A Glimpse of Physical Layer Decision Mechanisms: Facts, Challenges, and Remedies

no code implementations14 Feb 2021 Selen Gecgel, Caner Goztepe, Gunes Karabulut Kurt, Halim Yanikomeroglu

Conventional physical layer decision mechanisms may not meet these requirements, as they are often based on impractical and oversimplifying assumptions that result in a trade-off between complexity and efficiency.

Energy-Efficient RIS-Assisted Satellites for IoT Networks

no code implementations18 Jan 2021 Kürşat Tekbıyık, Güneş Karabulut Kurt, Halim Yanikomeroglu

The use of satellites to provide ubiquitous coverage and connectivity for densely deployed Internet of Things (IoT) networks is expected to be a reality in emerging 6G networks.

Information Theory Information Theory

Group Handover for Drone Base Stations

no code implementations16 Dec 2020 Yucel Aydin, Gunes Karabulut Kurt, Enver Ozdemir, Halim Yanikomeroglu

Mutual authentication, creating a communication channel between terrestrial BS and UxNB, and fast handover operations may cause security issues in the use of UxNB for capacity injection.

Cryptography and Security

Reconfigurable Intelligent Surfaces in Action for Non-Terrestrial Networks

no code implementations2 Dec 2020 Kürşat Tekbıyık, Güneş Karabulut Kurt, Ali Rıza Ekti, Halim Yanikomeroglu

Next-generation communication technology will be made possible by cooperation between terrestrial networks with non-terrestrial networks (NTN) comprised of high-altitude platform stations and satellites.

Free Space Optics for Next-Generation Satellite Networks

no code implementations7 Oct 2020 Aizaz U. Chaudhry, Halim Yanikomeroglu

In addition, the optical wireless satellite network that is created by utilizing laser ISLs is examined.

Site Diversity in Downlink Optical Satellite Networks Through Ground Station Selection

no code implementations5 Oct 2020 Eylem Erdogan, Ibrahim Altunbas, Gunes Kurt, Michel Bellemare, Guillaume Lamontagne, Halim Yanikomeroglu

Recent advances have shown that satellite communication (SatCom) will be an important enabler for next generation terrestrial networks as it can provide numerous advantages, including global coverage, high speed connectivity, reliability, and instant deployment.

3D Aerial Highway: The Key Enabler of the Retail Industry Transformation

no code implementations20 Sep 2020 Nesrine Cherif, Wael Jaafar, Halim Yanikomeroglu, Abbas Yongacoglu

Like highways for cargo trucks, 3D routes in the airspace should be designed for cargo-UAVs to fulfill their operations safely and efficiently.

Low Complexity Soft-Output Faster-than-Nyquist Detector Based on Semidefinite Relaxation

no code implementations14 Sep 2020 Adem Cicek, Enver Cavus, Ebrahim Bedeer, Halim Yanikomeroglu

The effectiveness of the proposed soSDR algorithm is evaluated using polar codes with successive cancellation decoding (SCD) through simulations, and its performance is compared against the state-of-the-art techniques from the literature.


Securing the Inter-Spacecraft Links: Doppler Frequency Shift based Physical Layer Key Generation

no code implementations31 Aug 2020 Ozan Alp Topal, Gunes Karabulut Kurt, Halim Yanikomeroglu

We propose a novel physical layer secret key generation method for the inter-spacecraft communication links.

Dynamics of Laser-Charged UAVs: A Battery Perspective

no code implementations31 Aug 2020 Wael Jaafar, Halim Yanikomeroglu

Subsequently, using these models, the path planning problem in a particular Internet-of-Things based use-case is revisited from the battery perspective.

Link Budget Analysis for Reconfigurable Smart Surfaces in Aerial Platforms

no code implementations27 Aug 2020 Safwan Alfattani, Wael Jaafar, Yassine Hmamouche, Halim Yanikomeroglu, Abbas Yongaçoglu

Specifically, we analyze the characteristics of RSS-equipped aerial platforms and compare their communication performance with that of RSS-assisted terrestrial networks, using standardized channel models.

On the Optimal 3D Placement of a UAV Base Station for Maximal Coverage of UAV Users

no code implementations21 Aug 2020 Nesrine Cherif, Wael Jaafar, Halim Yanikomeroglu, Abbas Yongacoglu

Specifically, the 3D placement problem of a directional antenna equipped UAV-BS, aiming to maximize the number of covered aerial users under a spectrum sharing policy with terrestrial networks, is investigated.

Learning Power Control from a Fixed Batch of Data

no code implementations5 Aug 2020 Mohammad G. Khoshkholgh, Halim Yanikomeroglu

We address how to exploit power control data, gathered from a monitored environment, for performing power control in an unexplored environment.

reinforcement-learning Reinforcement Learning (RL)

Faded-Experience Trust Region Policy Optimization for Model-Free Power Allocation in Interference Channel

no code implementations4 Aug 2020 Mohammad G. Khoshkholgh, Halim Yanikomeroglu

Policy gradient reinforcement learning techniques enable an agent to directly learn an optimal action policy through the interactions with the environment.

Decision Making reinforcement-learning +1

Reconfigurable Intelligent Surfaces Empowered THz Communication in LEO Satellite Networks

no code implementations8 Jul 2020 Kürşat Tekbıyık, Güneş Karabulut Kurt, Ali Rıza Ekti, Ali Görçin, Halim Yanikomeroglu

The revolution in the low Earth orbit (LEO) satellite networks will bring changes on their communication models and a shift from the classical bent-pipe architectures to more sophisticated networking platforms.

Information Theory Signal Processing Information Theory

Multiple Access in Aerial Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting

no code implementations27 May 2020 Wael Jaafar, Shimaa Naser, Sami Muhaidat, Paschalis C. Sofotasios, Halim Yanikomeroglu

In particular, space-division multiple access(SDMA) and power-domain non-orthogonal multiple access (NOMA) present promising multiplexing gains for aerial downlink and uplink.

Non-Orthogonal Multiple Access in the Presence of Additive Generalized Gaussian Noise

no code implementations11 May 2020 Lina Bariah, Sami Muhaidat, Paschalis C. Sofotasios, Sanjeev Gurugopinath, Walaa Hamouda, Halim Yanikomeroglu

The derived PEP expression is subsequently utilized to derive a union bound on the bit error rate (BER) and to quantify the diversity orders realized by NOMA users in the presence of additive white (AW) GGN.

A Prospective Look: Key Enabling Technologies, Applications and Open Research Topics in 6G Networks

no code implementations9 Apr 2020 Lina Bariah, Lina Mohjazi, Sami Muhaidat, Paschalis C. Sofotasios, Gunes Karabulut Kurt, Halim Yanikomeroglu, Octavia A. Dobre

To accommodate the stringent requirements of their prospective applications, which are data-driven and defined by extremely low-latency, ultra-reliable, fast and seamless wireless connectivity, research initiatives are currently focusing on a progressive roadmap towards the sixth generation (6G) networks.

Q-Learning Based Aerial Base Station Placement for Fairness Enhancement in Mobile Networks

no code implementations10 Sep 2019 Rozhina Ghanavi, Maryam Sabbaghian, Halim Yanikomeroglu

In this paper, we use an aerial base station (aerial-BS) to enhance fairness in a dynamic environment with user mobility.

Fairness Q-Learning +2

Downlink Coverage and Rate Analysis of an Aerial User in Vertical Heterogeneous Networks (VHetNets)

no code implementations24 May 2019 Nesrine Cherif, Mohamed Alzenad, Halim Yanikomeroglu, Abbas Yongacoglu

In denser terrestrial networks, the performance at the aerial user degrades substantially despite beamforming.

Low-Complexity Decoder for Overloaded Uniquely Decodable Synchronous CDMA

no code implementations11 Jun 2018 Michel Kulhandjian, Claude D'Amours, Hovannes Kulhandjian, Halim Yanikomeroglu, Dimitris A. Pados, Gurgen Khachatrian

We consider the problem of designing a low-complexity decoder for antipodal uniquely decodable (UD) /errorless code sets for overloaded synchronous code-division multiple access (CDMA) systems, where the number of signals Kamax is the largest known for the given code length L. In our complexity analysis, we illustrate that compared to maximum-likelihood (ML) decoder, which has an exponential computational complexity for even moderate code lengths, the proposed decoder has a quasi-quadratic computational complexity.


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