25 citations · 49 across the 21 of their papers we have counts for
26 papers
Spectral Efficiency Analysis of Massive MIMO-OFDM Systems with Double Quantization
Bengu Bilgic Keskin, A. Oguz Kislal, Ali Gorcin +1
Massive multiple-input multiple-output (MIMO) achieves a high spectral efficiency (SE) by employing a large number of receive antennas in the uplink. Employing many receive antenna…
CII: Novel CSI-RS Metric for Joint Precoder and RIS Reporting in Multi-User NextG Networks
Ali Fuat Sahin, Sefa Kayraklik, Ali Gorcin +3
While reconfigurable intelligent surfaces (RISs) are among the key enablers for next-generation (NextG) wireless networks, efficient feedback reporting for joint base station (BS)…
Pilot-Assisted Faster-than-Nyquist Signaling for HRLLC: A Non-Asymptotic Approach
Ahmet Oguz Kislal, Melda Yuksel, Ali Gorcin +1
This paper investigates the performance of faster-than-Nyquist (FTN) signaling within the context of hyper-reliable low-latency communications (HRLLC), specifically focusing on the…
A Novel Stripe-based RIS Optimization for UAV Communications and Sensing in Low-Altitude Wireless Networks
Burak Ahmet Celebi, Sefa Kayraklik, Onur Salan +3
Low-altitude wireless networks (LAWN) envision a reconfigurable 3D network capable of supporting mission-critical aerial operations. This paper presents a reconfigurable intelligen…
Radar-Assisted Beam Management Framework for mmWave NTNs: Overhead Reduction and Physical Layer Security Application
Bora Bozkurt, Cevdet Tosun, Mehmet Nuri Akinci +3
Fast and low-overhead beam management is a critical requirement for the practical deployment of non-terrestrial networks (NTNs) operating at millimeter-wave and higher frequencies.…
LO-Free Receiver: Next-Gen Low-Power Joint Communication and Sensing
Hasan Atalay Gunel, Mohaned Chraiti, Ali Gorcin
This paper introduces and analyzes Spatial Phase Manifold Communications (SPMC), a paradigm that facilitates joint communication and sensing (JCAS) over Local Oscillator (LO) free…
RFNoC-Based FPGA Offloading for Fully Programmable PHY Acceleration
A. Oguz Kislal, Osman Mert Yilmaz, Bengu Bilgic Keskin +2
Hardware acceleration has emerged as a key research topic for supporting computationally intensive signal processing and artificial intelligence applications in 6G research and dev…
A Novel CSI-RS Reporting Scheme for RIS Optimization in O-RAN-based NextG Networks
Ali Fuat Sahin, Sefa Kayraklik, Ali Gorcin +3
Reconfigurable intelligent surface (RIS) technology is a promising enabler for next-generation (NextG) wireless systems, capable of dynamically shaping the propagation environment.…
Performance Analysis of HAPS-RIS-Assisted MIMO Systems Under Phase-Dependent Amplitude Response Using Saddle Point Approximation
Tayfun Yilmaz, Haci Ilhan, Ali Gorcin +1
The integration of HAPS, RISs, and MIMO technologies is emerging as a promising paradigm for extending the coverage and reliability of future wireless communication networks. Howev…
Propagation and Rate-Aware Cell Switching Optimization in HAPS-Assisted Wireless Networks
Mehmet Eren Uluçınar, Özgün Ersoy, Berk Ciloglu +2
Cell switching is a promising approach for improving energy efficiency in wireless networks; however, existing studies largely rely on simplified models and energy-centric formulat…
ISAC-over-NTN: HAPS-UAV Framework for Post-Disaster Responsive 6G Networks
Berk Ciloglu, Ozgun Ersoy, Metin Ozturk +1
In disaster scenarios, ensuring both reliable communication and situational awareness becomes a critical challenge due to the partial or complete collapse of terrestrial networks.…
RIS-Assisted Physical Layer Security: Artificial Noise-Driven Optimization and Measurements
Ahmet Muaz Aktas, Sefa Kayraklik, Sultangali Arzykulov +3
Reconfigurable intelligent surface (RIS) has emerged as a key enabler for providing signal coverage, energy efficiency, reliable communication, and physical layer security (PLS) in…
ORIX: Orchestration of RIS with xApps for Smart Wireless Factory Environments
Sefa Kayraklik, Ali Fuat Sahin, Onur Salan +8
The vision of a smart wireless factory (SWF) demands highly flexible, low-latency, and reliable connectivity that goes beyond conventional wireless solutions. Reconfigurable intell…
Dual Target-Mounted RISs-Assisted ISAC Against Eavesdropping and Malicious Interference
Zehra Yigit, Sefa Kayraklik, Ertugrul Basar +1
The synergy between integrated sensing and communication (ISAC) and reconfigurable intelligent surfaces (RISs) unlocks novel applications and advanced services for next-generation…
Direction-Shift Keying for High-Mobility mmWave Communications: Geometry-Based Resilience to Short Channel Coherence Times and Phase Noise
Mohaned Chraiti, Ozgur Ercetin, Ali Ghrayeb +1
Communication reliability in high-mobility millimeter-wave (mmWave) systems is fundamentally challenged by rapid channel variations, manifested in short channel coherence times, an…
Joint Phase Shift Optimization and Precoder Selection for RIS-Assisted 5G NR MIMO Systems
Osman Mert Yilmaz, Tayfun Yilmaz, Ali Gorcin +3
By intelligently reconfiguring wireless propagation environment, reconfigurable intelligent surfaces (RISs) can enhance signal quality, suppress interference, and improve channel c…
Interference Modulation: A Novel Technique for Low-Rate and Power Efficient Multiple Access
M. Yaser Yagan, Ali E. Pusane, Ali Gorcin +1
The majority of spatial signal processing techniques focus on increasing the total system capacity and providing high data rates for intended user(s). Unlike the existing studies,…
Theoretical and Experimental Assessment of Large Beam Codebook at mmWave Devices: How Much is Enough?
Bora Bozkurt, Hasan Atalay Gunel, Mohaned Chraiti +3
Modern millimeter wave (mmWave) transceivers come with a large number of antennas, each of which can support thousands of phase shifter configurations. This capability enables beam…
A Practical Demonstration of DRL-Based Dynamic Resource Allocation xApp Using OpenAirInterface
Onur Sever, Onur Salan, Ibrahim Hokelek +1
Network slicing is a key enabler for providing a differentiated service support to heterogeneous use cases and applications in 5G and beyond networks through creating multiple logi…
RIS Meets O-RAN: A Practical Demonstration of Multi-user RIS Optimization through RIC
Ali Fuat Sahin, Onur Salan, Ibrahim Hokelek +1
Open Radio Access Network (O-RAN) along with artificial intelligence, machine learning, cloud and edge networking, and virtualization are important enablers for designing flexible…
Fast Network Recovery from Large-Scale Disasters: A Resilient and Self-Organizing RAN Framework
M. Yaser Yagan, Sefa Kayraklik, Samed Kesir +8
Extreme natural phenomena are occurring more frequently everyday in the world, challenging, among others, the infrastructure of communication networks. For instance, the devastatin…
Practical Implementation of RIS-Aided Spectrum Sensing: A Deep Learning-Based Solution
Sefa Kayraklik, Ibrahim Yildirim, Ertugrul Basar +2
This paper presents reconfigurable intelligent surface (RIS)-aided deep learning (DL)-based spectrum sensing for next-generation cognitive radios. To that end, the secondary user (…
Statistical Modeling of Propagation Channels for Terahertz Band
Ali Rıza Ekti, Ali Boyacı, Altan Alparslan +5
Digital revolution and recent advances in telecommunications technology enable to design communication systems which operate within the regions close to the theoretical capacity li…
Hybrid Automatic Neighbor Relations for 5G Wireless Networks
Ali Gorcin, Nicolae Cotanis
5G wireless networks aim to achieve seamless mobile broadband services, machine to machine and ultra-reliable low latency communications. These goals require massive improvements i…