Browsing by OzU Authors "Uğurdağ, Hasan Fatih"
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Fast one- and two-pick fixed-priority selection and muxing circuits
Tosun, Mustafa; Özkan, M. Akif; Güzel, Aydin Emre; Uğurdağ, Hasan Fatih (IEEE, 2016)Priority encoders and arbiters usually drive multiplexers (muxes). Latency optimization of priority encoders and multiplexer trees has usually been handled separately in the literature. However, in some applications with ... -
Fast parallel prefix logic circuits for n2n round-robin arbitration
Uğurdağ, Hasan Fatih; Baskirt, O. (Elsevier, 2012-08)An n2n round-robin arbiter (RRA) searches its n inputs for a 1, starting from the highest-priority input. It picks the first 1 and outputs its index in one-hot encoding. RRA aims to be fair to its inputs and maintains ... -
Fast two-pick n2n round-robin arbiter circuit
Uğurdağ, Hasan Fatih; Temizkan, Fatih; Baskirt, O.; Yuce, B. (IEEE, 2012-06)A regular (one-pick) round-robin arbiter circuit picks one active requester (if any) out of n requesters. A two-pick round-robin arbiter selects up to two requesters. An n2n two-pick round-robin arbiter indicates the picked ... -
FPGA based DCO-OFDM PHY transceiver for VLC systems
Levent, V. E.; Sağlam, Gürol; Uğurdağ, Hasan Fatih; Annafianto, Nur Fajar Rizqi; Aydın, Furkan; Tesfay, Shewit Weldu; Mohamed, Bassam Aly Abdelrahman; Elamassie, Mohammed; Kebapçı, Burak; Uysal, Murat (IEEE, 2019)Satisfying the demand for high bandwidth and low latency in Visible Light Communication (VLC) systems is a difficult challenge. VLC channels exhibit frequency-selectiveness at peak-speeds. This phenomenon generates a serious ... -
FPGA based particle identification in high energy physics experiments
Uğurdağ, Hasan Fatih; Başaran, A.; Akdogan, T.; Güney, V. U.; Gören, S. (IEEE, 2012)High energy physics experiments require on-the-fly processing of signals from many particle detectors. Such signals contain a high and fluctuating rate of pulses. Pulse shape hints particle type, and the amplitude relates ... -
FPGA bitstream protection with PUFs, obfuscation, and multi-boot
Gören, S.; Özkurt, Ö.; Yıldız, Abdullah; Uğurdağ, Hasan Fatih (IEEE, 2011)With the combination of PUFs, obfuscation, and multi-boot, we are able to do the equivalent of partial bitstream encryption on low-cost FPGAs, which is only featured on high-end FPGAs. Low-cost FPGAs do not even have ... -
FPGA implementation of a dense optical flow algorithm using altera openCL SDK
Ulutaş, Umut; Tosun, Mustafa; Levent, Vecdi Emre; Büyükaydın, D.; Akgün, T.; Uğurdağ, Hasan Fatih (Springer International Publishing, 2017)FPGA acceleration of compute-intensive algorithms is usually not regarded feasible because of the long Verilog or VHDL RTL design efforts they require. Data-parallel algorithms have an alternative platform for acceleration, ... -
FPGA implementation of a low latency and high SFDR direct digital synthesizer for resource-efficient quantum-enhanced communication
Annafıanto, Nur Fajar Rızqı; Jabir, M. V.; Burenkov, I. A.; Uğurdağ, Hasan Fatih; Battou, A.; Polyakov, S. V. (IEEE, 2020-09)A Direct Digital Synthesizer (DDS) generates a sinusoidal signal, which is a significant component of many communication systems using modulation schemes. A CORDIC algorithm offers minimum memory requirements compared to ... -
FPGA-based minimal Latency HEFT scheduler for heterogeneous computing
Aliyev, Ilkin; Mack, J.; Kumbhare, N.; Akoglu, A.; Uğurdağ, Hasan Fatih (IEEE, 2021)This paper proposes a new hardware scheduler. As heterogeneous computing becomes prevalent, mapping applications on to multiple processing elements (PEs) proves to be nontrivial. Heterogeneous Earliest Finish Time (HEFT) ... -
Generating fast logic circuits for m-select n-port round Robin arbitration
Uğurdağ, Hasan Fatih; Temizkan, F.; Gören, S. (IEEE, 2013)This paper generalizes the problem of Round Robin Arbitration (RRA) from 1-select to m-select (mRRA) and offers new circuit architectures for it. RRAs are found in networking equipment and computer systems with high ... -
Hardware division by small integer constants
Uğurdağ, Hasan Fatih; Dinechin, F. de; Gener, Y. S. (IEEE, 2017-12)This article studies the design of custom circuits for division by a small positive constant. Such circuits can be useful for specific FPGA and ASIC applications. The first problem studied is the Euclidean division of an ... -
Hardware implementation of field oriented control for three phase machine drives
Tüfekçi, B.; Önal, B.; Önal, H.; Uğurdağ, Hasan Fatih (IEEE, 2020-10-05)This paper presents a high switching frequency FPGA implementation of Maximum Torque Per Ampere (MTPA) and Flux Weakening which are branch of Field Oriented Control (FOC) method for 3-phase machine drives. A common ... -
HC-FFT: Highly configurable and efficient FFT implementation on FPGA
Ergül, Pakize; Uğurdağ, Hasan Fatih; Davutoğlu, D. (TÜBİTAK, 2021)FFT is one of the basic building blocks in many applications such as sensors, radars, communications. For some applications, e.g., real-time spectral monitoring and analysis, FFT needs to be”run-time configurable” so that ... -
HM-net: A regression network for object center detection and tracking on wide area motion imagery
Motorcu, Hakkı; Ateş, H. F.; Uğurdağ, Hasan Fatih; Güntürk, B. K. (IEEE, 2022)Wide Area Motion Imagery (WAMI) yields high resolution images with a large number of extremely small objects. Target objects have large spatial displacements throughout consecutive frames. This nature of WAMI images makes ... -
Hybrid CPU-GPU acceleration of a multithreaded image stitching algorithm
Tesfay, Shewıt Weldu; Demirdağ, Zeynep Gülbeyaz; Uğurdağ, Hasan Fatih; Ates, H. F. (IEEE, 2022)Real-time image stitching is critical, especially in un-manned aerial vehicles, and its acceleration has received attention in recent years. This paper describes an image stitching acceleration scheme for heterogeneous ... -
IEEE 802.15.7: Visible light communication standard
Uysal, Murat; Edemen, Çağatay; Baykaş, T.; Sarbazi, E.; Shams, P.; Uğurdağ, Hasan Fatih; Celebi, H. (Taylor & Francis, 2017-01-01)Visible light communications (VLC) use the visible spectrum (wavelengths of 390-750 nm or frequency band of 400-790 THz) and provide wireless communication using omnipresent light-emitting diodes (LEDs). Since the human ... -
An in-depth look at prior art in fast round-robin arbiter circuits
Uğurdağ, Hasan Fatih; Baskirt, O. (Özyeğin University, 08.01.2011)Arbiters are found where shared resources exist such as busses, switching fabrics, processing elements. Round-robin is a fair arbitration method, where requestors get near-equal shares of a common resource or service. ... -
Lossless look-up table compression for hardware implementation of transcendental functions
Gener, Y. S.; Gören, S.; Uğurdağ, Hasan Fatih (IEEE, 2019)Look-Up Table (LUT) implementation of transcendental functions often offers lower latency compared to algebraic implementations at the expense of significant area penalty. MultiPartite table method (MP) can circumvent the ... -
A multi-channel real time implementation of dual tree complex wavelet Transform in field programmable gate arrays
Canbay, F.; Levent, Vecdi Emre; Serbes, G.; Uğurdağ, Hasan Fatih (Springer International Publishing, 2016)In medical applications, biomedical acquisition systems (BASs) are frequently used in order to diagnose and monitor critical conditions such as stroke, epilepsy, Alzheimer disease, arrhythmias and etc. Biomedical signals ... -
Online real-time simulation of vehicles
Şahin, Mert; Gözüküçük, Mehmet Ali; Uğurdağ, Hasan Fatih (IEEE, 2020-09)Real-time simulation of a vehicle accessible as a server process on a network is needed in multiple use cases. One such use case is coordinated driving. Coordinated driving will eventually require us to control vehicles ...
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