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Recent Submissions

Isotropic gap formation, localization, and waveguiding in mesoscale Yukawa-potential amorphous structures
Sarihan, Murat Can; Gövdeli, Alperen; Lan, Zhihao; Yilmaz, Yildirim Batuhan; Erdil, Mertcan; Wang, Yupei; Aras, Mehmet Sirin; Yanik, Cenk; Panoiu, Nicolae Coriolan; Wong, Chee Wei; Kocaman, Serdar (2024-12-01)
Amorphous photonic structures are mesoscopic optical structures described by electrical permittivity distributions with underlying spatial randomness. They offer a unique platform for studying a broad set of electromagneti...
Design and verification of a parallel elastic robotic leg.
Tanfener, Emre; Karagoz, Osman Kaan; Candan, Sinan Şahin; Turgut, Ali Emre; Yazıcıoğlu, Yiğit; Ankaralı, Mustafa Mert; Saranli, Uluc (2024-01-29)
Efficient physics-based learned reconstruction methods for real-time 3D near-field MIMO radar imaging
Manisali, Irfan; Oral, Okyanus; Öktem, Sevinç Figen (2024-01-01)
Near-field multiple-input multiple-output (MIMO) radar imaging systems have recently gained significant attention. These systems generally reconstruct the three-dimensional (3D) complex-valued reflectivity distribution of ...
Reduced Complexity Correlation-Based Multi-Stream DPD for Hybrid Massive MIMO
Salman, Murat Babek; Ucuncu, Ali Bulut; Güvensen, Gökhan Muzaffer (2024-01-01)
This paper proposes a reduced complexity digital predistortion (DPD) scheme for fully-connected hybrid beamforming systems for massive multiple-input multiple-output (MIMO) channels impaired by nonlinear power amplifiers (...
Learning Graph ARMA Processes From Time-Vertex Spectra
Güneyi, Eylem Tuǧçe; Yaldiz, Berkay; Canbolat, Abdullah; Vural, Elif (2024-01-01)
The modeling of time-varying graph signals as stationary time-vertex stochastic processes permits the inference of missing signal values by efficiently employing the correlation patterns of the process across different gra...
Induced Current Electro-Thermal Imaging for Breast Tumor Detection: A Numerical and Experimental Study
Tanrıverdi, Volkan; Gençer, Nevzat Güneri (2024-01-01)
This study proposes using magnetically induced currents in medical infrared imaging to increase the temperature contrast due to the electrical conductivity differences between tumors and healthy tissues. There are two obje...
Design, simulation, and measurement of near-zero-index shells for electromagnetic beam generation
Eriş, Özgür; Ergül, Özgür Salih (2024-01-01)
We present design and simulation of three-dimensional (3D) shell structures, which generate directional radiation patterns from isotropic sources thanks to their near-zero-index (NZI) characteristics, as well as realizatio...
A Hierarchical Control Scheme for Trajectory Tracking USVs in Environments with Disturbances and Dynamic Obstacles
Ahiska, Kenan; Leblebicioğlu, Mehmet Kemal (2024-01-01)
In this paper, a hierarchical control scheme for trajectory-tracking unmanned surface vehicles (USVs) is proposed and tested. The proposed control scheme is capable of avoiding dynamic obstacles under wind and sea current ...
Laser seeker design with multi-focal diffractive lens
Ünal, Ahmet (2023-12-01)
Diffractive optical elements are increasingly favoured due to their ability to provide numerous design freedoms by adjusting the Fresnel regions. The design freedoms make it possible to meet multiple system functions in el...
A Multi-Mode Pattern Diverse Microstrip Patch Antenna Having a Constant Gain in the Elevation Plane
Karaçuha, Kamil; Çelik, Feza Turgay; Helvaci, Halil Ismail (2023-11-12)
This study investigates a multi-mode pattern diverse microstrip patch antenna operating at 2.45 GHz. The study aims to have a flat top gain covering more than 900 in the elevation plane to provide equal service quality to ...
Tuning the Shades of Red Emission in InP/ZnSe/ZnS Nanocrystals with Narrow Full Width for Fabrication of Light-Emitting Diodes
Soheyli, Ehsan; Biçer, Ayşenur; Ozel, Sultan Suleyman; ŞAHİN TIRAŞ, KEVSER; MUTLUGÜN, EVREN (2023-10-24)
While Cd-based luminescent nanocrystals (NCs) are the most mature NCs for fabricating efficient red light-emitting diodes (LEDs), their toxicity related limitation is inevitable, making it necessary to find a promising alt...
Low complexity nonlinear detection for multiuser hybrid MIMO systems and performance analysis
Salman, Murat Babek; Güvensen, Gökhan Muzaffer; Çiloğlu, Tolga (2023-10-01)
This paper proposes an analytical framework and a system of distortion-aware receiver structures for single-carrier uplink hybrid beamforming-based multiple-input-multiple-output (MIMO) channels. Proposed single-user proce...
Integrated programmable controlled phase gate design for quantum information processing
Başay, Yalın; Kocaman, Serdar (2023-10-01)
An integrated programmable controlled-phase (CPHASE) gate has been proposed for quantum information processing applications. This gate can introduce arbitrary phase difference to the target qubit in the case of the control...
High-Resolution Indoor Sensing Using Channel State Information of WiFi Networks
Zhou, Hongjian; Zhang, Yongwei; Temiz, Murat (2023-09-01)
Indoor sensing is becoming increasingly important over time as it can be effectively utilized in many applications from digital health care systems to indoor safety and security systems. In particular, implementing sensing...
Grating-free high-x InP/InxGa1-xAs mid-wavelength infrared QWIP focal plane array
Beşikci, Cengiz; Balcı, Saadettin V.; Tanış, Onur; Güngör, Oğuz Onur; Arpaguş, Esra S. (Polish Academy of Sciences Chancellery, 2023-8-30)
The authors report the characteristics of a diffraction-grating-free mid-wavelength infrared InP/In0.85Ga0.15As quantum well infrared photodetector focal plane array with a 640 × 512 format and a 15 m pitch. Combination o...
TMO-Det: Deep tone-mapping optimized with and for object detection
Koçdemir, İsmail Hakkı; Koz, Alper; Akyuz, Ahmet Oguz; Chalmers, Alan; Alatan, Abdullah Aydın; Kalkan, Sinan (2023-08-01)
Parametrization-free locally-conformal perfectly matched layer method for finite element solution of Helmholtz equation
ÖZGÜN, ÖZLEM; Kuzuoğlu, Mustafa; Beriot, Hadrien; Mittra, Raj (2023-07-01)
We present a novel Locally-Conformal Perfectly Matched Layer (LCPML) method for mesh truncation in the Finite Element Method (FEM), to solve wave equations derived from Maxwell's equations. The original LCPML method was pr...
Gaussian Mixture Filtering with Nonlinear Measurements Minimizing Forward Kullback-Leibler Divergence
Laz, Eray; Orguner, Umut (2023-07-01)
A Gaussian mixture filter is proposed for the state estimation of dynamical systems with nonlinear measurements. The filter is derived by solving an assumed density filtering problem where Kullback-Leibler (KL) divergence ...
An Experimental Study of Radar-Centric Transmission for Integrated Sensing and Communications
Temiz, Murat; Horne, Colin; Peters, Nial J.; Ritchie, Matthew A.; Masouros, Christos (2023-07-01)
This study proposes a dual-function radar and communication (DFRC) system that utilizes radar transmission parameters as modulation indexes to transmit data to the users while performing radar sensing as its primary functi...
Synchronization of oscillators not sharing a common ground
Tuna, Sezai Emre (2023-5-01)
Networks of coupled LC oscillators that do not share a common ground node are studied. Both resistive coupling and inductive coupling are considered. For networks under resistive coupling, it is shown that the oscillator-c...
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