15 papers
Generative Large-Array Emulation for DOA Estimation in MIMO Radar via Conditional Diffusion
Adam Umra, Aya Mostafa Ahmed, Aydin Sezgin
Accurate direction-of-arrival (DOA) estimation from a small multiple-input multiple-output (MIMO) radar array is limited by its aperture, while adding antennas increases hardware c…
From Prompt to Prototype: Towards a Frontier LLM Driven RF Engineering Workflow
Markus Heinrichs, Oscar Moschner, Simon Tewes +3
Agentic coding environments give a frontier large language model (LLM) direct access to a workstation's terminal, file system, and software. This work demonstrates they extend to p…
Self-Supervised Noise2Noise-Enhanced Denoising for Continuous-Scan Air-Plasma THz Spectroscopy
Adam Umra, Oways Alsoloh, Oliver Nagy +2
Terahertz time-domain spectroscopy (THz-TDS) based on air-plasma generation and balanced air-biased coherent detection offers gap-free broadband coverage, but individual continuous…
Design and Practical Validation of a Novel Modulation Scheme for RIS Detection and Identification
Aymen Khaleel, Adam Umra, Aydin Sezgin
The reconfigurable intelligent surfaces detection and identification (RISs-ID) is a critical process that enables a base station (BS) to adaptively assign the appropriate RIS to a…
Exploiting Near-Field Dynamics with Movable Antennas to Enhance Discrete Transmissive RIS
Marjan Boloori, Chu Li, Aydin Sezgin
The design of low-complexity transceivers is crucial for the deployment of next-generation wireless systems. In this work, we combine two emerging concepts, movable antennas (MA) a…
A Scalable Reconfigurable Intelligent Surface with 3 Bit Phase Resolution and High Bandwidth for 3.6 GHz 5G/6G Applications
Markus Heinrichs, Aydin Sezgin, Rainer Kronberger
Reconfigurable Intelligent Surfaces enable active control of wireless propagation channels, which is crucial for future 5G and 6G networks. This work presents a scalable RIS design…
Measurement-Based Validation of Geometry-Driven RIS Beam Steering in Industrial Environments
Adam Umra, Simon Tewes, Niklas Beckmann +3
Reconfigurable intelligent surfaces (RISs) offer programmable control of radio propagation for future wireless systems. For configuration, geometry-driven analytical approaches are…
RIS-Assisted Rank Enhancement With Commodity WiFi Transceivers: Real-World Experiments
Aymen Khaleel, Aydin Sezgin
Reconfigurable intelligent surfaces (RISs) are a promising enabling technology for the sixth-generation (G) of wireless communications. RISs, thanks to their intelligent design,…
Short Blocks, Fast Sensing: Finite Blocklength Tradeoffs in RIS-Assisted ISAC
Adam Umra, Kevin Weinberger, Aymen Khaleel +2
Integrated sensing and communication (ISAC) is a cornerstone for future sixth-generation (6G) networks, enabling simultaneous connectivity and environmental awareness. However, pra…
RL-Aided Cognitive ISAC: Robust Detection and Sensing-Communication Trade-offs
Adam Umra, Aya M. Ahmed, Aydin Sezgin
This paper proposes a reinforcement learning (RL)-aided cognitive framework for massive MIMO-based integrated sensing and communication (ISAC) systems employing a uniform planar ar…
Hardware-Efficient Cognitive Radar: Multi-Target Detection with RL-Driven Transmissive RIS
Adam Umra, Aya Mostafa Ahmed, Stefan Roth +1
Cognitive radar has emerged as a key paradigm for next-generation sensing, enabling adaptive, intelligent operation in dynamic and complex environments. Yet, conventional cognitive…
Towards Smarter Sensing: 2D Clutter Mitigation in RL-Driven Cognitive MIMO Radar
Adam Umra, Aya Mostafa Ahmed, Aydin Sezgin
Motivated by the growing interest in integrated sensing and communication for 6th generation (6G) networks, this paper presents a cognitive Multiple-Input Multiple-Output (MIMO) ra…
Terahertz Defect Detection in Multi-Layer Materials Using Echo Labeling
Dogus Can Sevdiren, Furkan H. Ilgac, Aydin Sezgin
Non-destructive testing is an important technique for detecting defects in multi-layer materials, enabling the evaluation of structural integrity without causing damage on test mat…
RIS-Aided Radar Imaging Utilizing the Virtual Source Principle
Furkan H. Ilgac, Mounia Bouabdellah, Aydin Sezgin
This paper investigates signle-antenna radar imaging with a reconfigurable intelligent surface (RIS). Configuring phase shifts in a RIS-aided radar system can be thought as synthet…
RIS-Aided Bistatic Radar for Rapid NLOS Sensing in the Teraharetz Band
Furkan H. Ilgac, Emrah Cisija, Aya Mostafa Ahmed +3
In this paper, we investigate a non-lineof-sight (NLOS) sensing problem at terahertz frequencies. To be able to observe the targets shadowed by a blockage, we propose a method usin…