Tunçer Baykaş

Baykaş, Tunçer

Name Variants

B.,Tuncer
Baykaş, Tunçer
Tunçer Baykaş
Baykaş T.
Baykaş, T.
T. Baykaş
B., Tuncer
Baykas, Tuncer
B., Tunçer
BAYKAŞ, Tunçer
Baykas,T.
Baykaş, TUNÇER
Baykas T.
Baykaş,T.
TUNÇER BAYKAŞ
Tunçer BAYKAŞ
BAYKAŞ, TUNÇER
Tuncer, Baykas
Baykas,Tuncer
Baykaş, Tunçer

Job Title

Doç. Dr.

Email Address

tuncer.baykas@khas.edu.tr

ORCID ID

0000-0001-9535-2102

Scopus Author ID

24328990900

Full item page

Scholarly Output

31

Articles

12

Citation Count

150

Supervised Theses

1 Scholarly Output Search Results

Now showing 1 - 10 of 28

Citation Count: 1
Busy Tone Implementation for Coexistence of Ieee 802.22 and 802.11 Af Systems
(IEEE, 2015) Karatalay, Onur; Erküçük, Serhat; Baykaş, Tunçer
In this paper a new algorithm based on busy tone approach has been proposed for the coexistence of IEEE 802.22 and IEEE 802.11af systems in TV white space. Different from the earlier study in addition to 802.11af access points listening to the busy tone signal their clients also listen to the busy tone and let the access points know once they hear it. Accordingly interference caused to 802.22 systems has been reduced. This study quantifies the improved system performance in terms of interfering packet rate for different hearing regions considering the communication parameters and channel models adapted for the standards.
Citation Count: 2
Busy Tone Implementation for Coexistence of Ieee 802.22 and 802.11af Systems
(Institute of Electrical and Electronics Engineers Inc., 2015) Karatalay, O.; Erküçük, S.; Baykaş, T.
In this paper, a new algorithm based on busy tone approach has been proposed for the coexistence of IEEE 802.22 and IEEE 802.11af systems in TV white space. Different from the earlier study, in addition to 802.11af access points listening to the busy tone signal, their clients also listen to the busy tone and let the access points know once they hear it. Accordingly, interference caused to 802.22 systems has been reduced. This study quantifies the improved system performance in terms of interfering packet rate for different hearing regions considering the communication parameters and channel models adapted for the standards. © 2015 IEEE.
Citation Count: 1
Analysis of deep learning based path loss prediction from satellite images
(IEEE, 2021) Alam, Muhammad Z.; Ates, Hasan F.; Baykas, Tuncer; Gunturk, Bahadir K.
Determining the channel model parameters of a wireless communication system, either by measurements or by running electromagnetic propagation simulations, is a time-consuming process. Any rapid deployment of network demands faster determination of at least major channel parameters. In this paper, we investigate the idea of using deep convolutional neural networks and satellite images for channel parameters (i.e., path loss exponent n and shadowing factor sigma) prediction in a cellular network with aerial base stations. Specifically, we investigate the performance dependency of the method on three different factors: height of the transmitter antenna, quantization levels of the channel parameters and architectural design of CNN. The results presented in this paper show a high prediction accuracy of the channel parameters in real-time.
Citation Count: 0
Predicting Path Loss Distributions of a Wireless Communication System for Multiple Base Station Altitudes From Satellite Images
(Ieee, 2022) Shoer, Ibrahim; Gunturk, Bahadir K.; Ates, Hasan F.; Baykas, Tuncer
It is expected that unmanned aerial vehicles (UAVs) will play a vital role in future communication systems. Optimum positioning of UAVs, serving as base stations, can be done through extensive field measurements or ray tracing simulations when the 3D model of the region of interest is available. In this paper, we present an alternative approach to optimize UAV base station altitude for a region. The approach is based on deep learning; specifically, a 2D satellite image of the target region is input to a deep neural network to predict path loss distributions for different UAV altitudes. The neural network is designed and trained to produce multiple path loss distributions in a single inference; thus, it is not necessary to train a separate network for each altitude.
Citation Count: 2
The Use of Statistical Features for Low-Rate Denial of Service Attack Detection
(Institute of Electrical and Electronics Engineers Inc., 2023) Fuladi,R.; Baykas,T.; Anarim,E.
Low-rate Denial of Service (LDoS) attacks can significantly reduce the serving capabilities of networks. These attacks involve sending periodic high-intensity pulse data flows, and their harmful effects are like those of traditional DoS attacks. However, LDoS attacks have different attack modes, which make them particularly challenging to detect. The high level of concealment associated with LDoS attacks makes it extremely difficult for traditional DoS detection methods to identify them. This paper explores the potential of using statistical features for LDoS attack detection. The results demonstrate that statistical features can offer promising performance in detecting these types of attacks. Furthermore, through the application of RFE and SHAP analysis, we find that entropy and L-moment-based features play a crucial role in detection. These findings provide important insights into the use of statistical features for network security, which can help to enhance the overall resilience of networks against various types of attacks. © 2023 IEEE.
Citation Count: 0
IEEE 802.11BB Reference Channel Models For Light Communications
(Institute of Electrical and Electronics Engineers Inc., 2023) Miramirkhani,F.; Baykas,T.; Elamassie,M.; Uysal,M.
Increasing industrial attention to visible light communications (VLC) technology led the IEEE 802.11 to establish the task group 802.11bb 'Light Communications' (LC) for the development of a VLC standard. As a part of the standard development process, the development of realistic channel models according to possible use cases is of critical importance for physical layer system design. This article presents the reference channel models for the mandatory usage models adopted by IEEE 802.11bb for the evaluation of system proposals. The use cases include industrial, medical, enterprise, and residential scenarios. Channel impulse responses and corresponding frequency responses are obtained for each use case using a ray tracing approach based on realistic specifications for transmitters and receivers, and optical characterization of the environment. © 2023 IEEE.
Citation Count: 4
Analysis of Extended Busy Tone Performance for Coexistence Between Wran and Wlan Tvws Networks
(IEEE, 2015) Karatalay, Onur; Erküçük, Serhat; Baykaş, Tunçer
TV White Spaces indicate spectrum bands which were reserved for licensed terrestrial TV broadcasting and opened to unlicensed use under regulatory conditions. One important regulation which is common in all regulatory domains is no harmful interference is created to licensed devices. On the other hand interference between unlicensed devices is not regulated. As a result system designers developed new methods to improve coexistence between TVWS networks. Extended busy tone one of such methods is designed for coexistence between wireless regional area and wireless local area networks based on IEEE 802.22 and 802.11af standards respectively. In this paper we analyse the performance of extended busy tone at different range conditions and verify via simulations under realistic conditions. Our results indicate that the method can reduce interference considerably at intermediate distances and enable networks to operate without a significant reduction in throughput.
Citation Count: 1
Busy Tone Based Power Control for Coordination of Iffy 802.11af and 802.22 System
(IEEE, 2017) Ülgen, Oğuz; Erküçük, Serhat; Karatalay, Onur; Baykas, Tuncer
In this paper, a new power control algorithm based on busy tone approach has been proposed for the coordination of IEEE 802.22 and IEEE 802.11af systems in TV white space. Different from the earlier studies, in addition to both 802.11af access point and clients listening to the busy tone, they also adjust their communication power according to the location information and use hopping for communication, if needed Acccordingly, interference caused to 802.22 systems has been reduced while the 802.11af systems are still able to communicate. This study quantifies the 802.11af and 802.22 system performances in terms of interfering packet rate and succesful packet transmission rate for different scenarios considering the communication parameters and channel models adapted for the standards.
Scma Sistemlerinin Performans İncelemeleri
(2023) Tüfekçi, Tolga Kağan; Baykaş, Tunçer
Sürekli yükselen; veri hızı, düşük gecikme, spektral verimlilik ve veri hacmi ihtiyaçlarını karşılayabilmek adına yeni haberleşme yöntemleri geliştirilmektedir. Seyrek Kodlu Çoklu Erişim (Sparse Code Multiple Access - SCMA) bu tekniklerin arasında yer almaktadır. SCMA, dikgen olmayan çoklu erişim (Non-orthogonal Multiple Access - NOMA) yöntemidir. SCMA ile farklı kullanıcılar aynı frekans kaynaklarına atanmasından dolayı spektral verimlilik arttırılır. Her kullanıcıya; seyrek, çok boyutlu ve kompleks değerli kod kitapları atanır, bu sebeple SCMA sistemlerinin performansı da kod kitaplarının kalitesine bağlıdır. Bu tezde; SCMA sistemlerinin farklı senaryolar altındaki performansları incelenmiştir bunlar, 1) Hızlı Sönümlenen Rayleigh Kanallarının etkisi incelenmiş ve bu kanal tipinin SCMA performansındaki negatif etkileri azaltabilmek adına Hızlı Mesaj İletim Algoritması (High-Rate MPA) önerilmiştir. 2) Dikgen ve dikgen olmayan pilot sekansları ve bu sekanslardan yola çıkarak En Küçük Kareler Kestirimi (Least Squares Estimation) yapılmıştır. 3) Simgelerarası Karışmanın (Intersymbol Interference - ISI), SCMA sistemleri üzerindeki etkisi ve PN Sekanslarının üretimi ve kullanımı incelenmiştir. 4) Literatürde bulunan farklı kod kitaplarının SCMA sistemlerindeki performansı incelenmiş ve ayrıca Genetik Algoritma tabanlı bir kod kitabının tasarımı ve yine etkisi incelenmiştir.
Citation Count: 0
Performance Evaluation of Dtn Routing Protocols for Drone Swarms Using a Web-Based Simulator
(IEEE, 2023) Beisenkhanov, Dauren; Kizilirmak, Refik Caglar; Ukaegbu, Ikechi; Baykas, Tuncer
The growing interest in drone swarms and their applications using wireless communication has resulted in the necessity for innovative network architectures. Drone swarms are subject to highly dynamic network topology, and the low drone density may constrain connectivity and overall network performance. The Delay Tolerant Network (DTN) architecture, which is based on dynamic discovery of neighbouring nodes and relay of data via store-and-forward mechanism, overcomes these challenges. In this study, we develop a DTN simulator for drone swarms using web technologies that operate within the web browser. We employ two commonly used DTN routing algorithms, namely epidemic routing and spray-and-wait routing, for varying numbers of nodes, simulation durations, and maximum allowed copies in the network. We compare these protocols by evaluating performance metrics such as delivery probability, number of hops/copies, and delivery time, through a case study. Additionally, we investigate the influence of the outage probability of the air-to-air channel between nodes.