51 papers
HAP-Centric Flying Ad-Hoc Networks With Cell-Free Non-Terrestrial Connectivity
Muhammet Kırık, Liza Afeef, Halim Yanikomeroglu +1
High-altitude platforms (HAPs) are key enablers of next-generation non-terrestrial networks (NTNs), offering wide coverage, long endurance, and rapid deployment. Despite these adva…
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…
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 paper develops an analytical framework to characterize the SNR distribution and outage probability of high‑altitude platform station (HAPS)‑mounted RIS‑assisted MIMO systems, u…
Robust and Feasible QoS-Aware mmWave Massive MIMO Hybrid Beamforming
Mohsen Tajallifar, Ahmad R. Sharafat, Halim Yanikomeroglu
Hybrid beamforming (HB) with quality-of-service (QoS) provisioning per stream in millimeter waves is indispensable in 5G/6G networks. HB includes baseband and radio frequency (RF)…
Constrained Capacity Analysis for Faster-than-Nyquist Signaling
Zichao Zhang, Melda Yuksel, Gokhan M. Guvensen +1
This paper studies the constrained-capacity for precoded faster-than-Nyquist (FTN) signaling with finite-alphabet inputs. Despite the promise of accelerated transmission, the funda…
Flexible FTN-Aided OTFS Modulation for High-Mobility LEO Satellite-to-Ground Communications
Chaorong Zhang, Benjamin K. Ng, Hui Xu +3
In low Earth orbit (LEO) satellite communications, the link quality fluctuates drastically during a satellite pass, exhibiting a wide dynamic range from the horizon to the zenith.…