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Recent Submissions

A 1-V Nanopower Highly Tunable Biquadratic Gm−C Bandpass Filter for Fully Implantable Cochlear Implants Özbek, Berkay; Külah, Haluk (2021-12-23) This paper presents a low power highly tunable second-order Gm−C bandpass filter for auditory signal processing of fully implantable cochlear implants. The resonance frequency of the filter is tunable within the daily acou...
Semi-Automatic Annotation For Visual Object Tracking Köksal, Aybora; Alatan, Abdullah Aydın (2021-11-24) We propose a semi-automatic bounding box annotation method for visual object tracking by utilizing temporal information with a tracking-by-detection approach. For detection, we use an off-the-shelf object detector which is...
Işıma Örüntüsü Şekillendirilebilen Kompakt Mikroşerit Yama Anten Çalışması Çelik, Feza Turgay; Alatan, Lale; Aydın Çivi, Hatice Özlem (2021-09-07) Bu çalışmada ışıma örüntüsü şekillendirilebilir mikroşerit anten tasarımı incelenecektir. Tasarımın amacı ışıma örüntüsünü yükseliş düzleminde +400 ile -400 arasında tarayabilmektir. Anten kare mikroşerit yama antenin iki ...
Compact and Directional Printed Dipole Antenna Pair Conformed on a Conical Surface Haykir, Yigit; Kallem, Aydoga; Demir, Şimşek (2021-08-28) In this paper, a small sized transmitting and receiving conformal antenna pair is proposed on a conical surface for C-band radar applications. The antenna pair consists of printed dipole elements and a truncated reflector ...
An Efficient Iterative SIC for Full-Duplex SC-FDE Radio under Hardware Impairments Kurt, Anıl; Salman, Murat Babek; Güvensen, Gökhan Muzaffer (2021-06-01) In this study, a novel iterative turbo digital self interference cancellation (DSIC) algorithm is proposed to eliminate remaining self interference (SI) signal, which is contaminated by signal of interest (SoI), subject to...
An Efficient Constrained mm-Wave Hybrid Massive MIMO Beamforming for JSDM based NOMA Bayraktar, Murat; Güvensen, Gökhan Muzaffer (2021-06-01) Massive MIMO and non-orthogonal multiple access (NOMA) are key technologies for next generation wireless systems due to their distinct advantages. We previously proposed a general framework on unification of code-domain NO...
A Nonlinear Detector for Uplink SC-FDE mm-Wave Hybrid Massive MIMO under Hardware Impairments Salman, Murat Babek; Güvensen, Gökhan Muzaffer (2021-06-01) In this paper, we propose a detector structure for fully connected hybrid massive MIMO systems with transceiver impairments at user equipments. In literature, memoryless compensation of nonlinear effects at the receiver si...
Adversarial Attacks on CFO-Based Continuous Physical Layer Authentication: A Game Theoretic Study Sarıtaş, Serkan; Thobaben, Ragnar; Sandberg, Henrik; Dan, Gyorgy (2021-06-01) 5G and beyond 5G low power wireless networks make Internet of Things (IoT) and Cyber-Physical Systems (CPS) applications capable of serving massive amounts of devices and machines. Due to the broadcast nature of wireless n...
Additive Manufactured Matching Medium Design for Implant Communications Habiboglu, Ozum; Akgun, Sila; Cil, Erdem; Aydın Çivi, Hatice Özlem; Dumanli, Sema (2021-03-22) The design of matching media with different dielectric constants for the use in implant communications is presented in this paper. Each medium consists of a three-dimensional printed honeycomb structure filled with a high ...
Combined Potential-Field Surface Formulations for Resonance-Free and Low-Frequency-Stable Analyses of Three-Dimensional Closed Conductors Eris, Ozgur; Karaova, Gokhan; Ergül, Özgür Salih (2021-03-22) We present combined formulations involving the recently developed potential integral equations (PIEs) together with field formulations, particularly the magnetic-field integral equation (MFIE), for accurate, efficient, and...
Efficient Computation of Green's Functions for Multilayer Media in the Context of 5G Applications Mittra, Raj; ÖZGÜN, ÖZLEM; Li, Chao; Kuzuoğlu, Mustafa (2021-03-22) This paper presents a novel method for effective computation of Sommerfeld integrals which arise in problems involving antennas or scatterers embedded in planar multilayered media. Sommerfeld integrals that need to be comp...
End-to-end learned image compression with conditional latent space modeling for entropy coding Yesilyurt, Aziz Berkay; Kamışlı, Fatih (2021-01-24) The use of neural networks in image compression enables transforms and probability models for entropy coding which can process images based on much more complex models than the simple Gauss-Markov models in traditional com...
A Theoretical Analysis of Multi-Modal Representation Learning with Regular Functions Vural, Elif (2021-01-07) Multi-modal data analysis methods often learn representations that align different modalities in a new common domain, while preserving the within-class compactness and within-modality geometry and enhancing the between-cla...
Investigation of Stationarity for Graph Time Series Data Sets Güneyi, Eylem Tuğçe; Vural, Elif (2021-01-07) Graphs permit the analysis of the relationships in complex data sets effectively. Stationarity is a feature that facilitates the analysis and processing of random time signals. Since graphs have an irregular structure, the...
DFM: A Performance Baseline for Deep Feature Matching Efe, Ufuk; Ince, Kutalmis Gokalp; Alatan, Abdullah Aydın (2021-01-01) A novel image matching method is proposed that utilizes learned features extracted by an off-the-shelf deep neural network to obtain a promising performance. The proposed method uses pre-trained VGG architecture as a featu...
Efficient User Grouping for Hybrid Beamforming in Single Carrier Wideband Massive MIMO Channels Kilcioglu, Emre; Güvensen, Gökhan Muzaffer (2021-01-01) In this paper, three types of user grouping algorithms in which our own performance metric is utilized are investigated for single carrier downlink wideband spatially correlated massive MIMO channels by using hybrid beamfo...
Exploiting Local Indexing and Deep Feature Confidence Scores for Fast Image-to-Video Search Ozkan, Savas; Akar, Gözde (2021-01-01) The cost-effective visual representation and fast query-by-example search are two challenging goals that should be maintained for web-scale visual retrieval tasks on moderate hardware. This paper introduces a fast and robu...
Plug-in Electric Vehicle Load Modeling for Smart Charging Strategies in Microgrids Güzel, Saliha İven; Göl, Murat (2021-01-01) The widespread adoption of plug-in electric vehicles (PEVs) is a path to be taken towards a green energy future, yet the uncoordinated penetration of PEVs prompts overloadings and low voltage violations that the existing p...
Self-training Guided Adversarial Domain Adaptation For Thermal Imagery Akkaya, Ibrahim Batuhan; Altinel, Fazil; Halıcı, Uğur (2021-01-01) Deep models trained on large-scale RGB image datasets have shown tremendous success. It is important to apply such deep models to real-world problems. However, these models suffer from a performance bottleneck under illumi...
Design and Simulation of Passive Reflecting Surfaces for 5G Applications Karaova, Gokhan; Ergül, Özgür Salih (2021-01-01) Design and simulation of passive reflectors to be used in 5G applications are presented. An optimization environment is constructed based on genetic algorithms (GAs) and a full-wave solver to obtain compact reflectors that...

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