Browsing Faculty of Engineering by Author "(ORCID 0000-0001-5945-0813 & YÖK ID 124615) Uysal, Murat"
Now showing items 301-320 of 349
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Soft actor-critic-based computation offloading in multiuser MEC-enabled IoT-A lifetime maximization perspective
Heidarpour, A. R.; Heidarpour, M. R.; Ardakani, M.; Tellambura, C.; Uysal, Murat (IEEE, 2023-10-15)This article studies the network lifetime optimization problem in a multiuser mobile-edge computing (MEC)-enabled Internet of Things (IoT) system comprising an access point (AP), a MEC server, and a set of K mobile devices ... -
A software defined radio based data link design for VHF band wireless sensor networks
Celik, G.; Aitalieva, A.; Celebi, H.; Uysal, Murat (Elsevier, 2018-10)In this paper, we present an overall data link design for a tactical wireless sensor network operating at VHF band considering software defined radio (SDR) approach. An empirical channel modeling for the target environment ... -
Software defined VLC system: implementation and performance evaluation
Hussain, Waqas; Uğurdağ, Hasan Fatih; Uysal, Murat (IEEE, 2015)This paper presents the implementation of an IEEE standard-based Visible Light Communication (VLC) system using software defined radio (SDR) approach. Based on widely used SDR platform Universal Software Radio Peripheral ... -
Space-time block coded spatial modulation for indoor visible light communications
Naser, S.; Bariah, L.; Muhaidat, S.; Al-Qutayri, M.; Uysal, Murat; Sofotasios, P. (IEEE, 2022-02)Visible light communication (VLC) has been recognized as a promising technology for handling the continuously increasing quality of service and connectivity requirements in modern wireless communications, particularly in ... -
Sparse channel estimation and equalization for OFDM-based underwater cooperative systems with amplify-and-forward relaying
Panayırcı, E.; Şenol, H.; Uysal, Murat; Poor, H. V. (IEEE, 2016-01-01)This paper is concerned with a challenging problem of channel estimation and equalization for amplifyand- forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in sparse underwater ... -
Sparse channel estimation for OFDM-based underwater acoustic systems in rician fading with a new OMP-MAP algorithm
Panayirci, E.; Altabbaa, M. T.; Uysal, Murat; Poor, H. V. (IEEE, 2019-03-15)In this paper, a new channel estimation algorithm is proposed that exploits channel sparsity in the time domain for an orthogonal frequency division multiplexing (OFDM)-based underwater acoustical (UWA) communications ... -
Sparse channel estimation for OFDM-based underwater cooperative systems with amplify-and-forward relaying
Şenol, H.; Panayırcı, E.; Uysal, Murat (IEEE, 2014)This paper is concerned with a challenging problem of channel estimation for amplify-and-forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in the presence of sparse underwater acoustic ... -
Spectrum sensing of correlated subbands with colored noise in cognitive radios
Pourgharehkhan, Z.; Sedighi, S.; Taherpour, A.; Uysal, Murat (IEEE, 2012)In this paper, we consider the problem of wideband spectrum sensing by using the correlation among the observation samples in different subbands. The Primary User (PU) signal samples in occupied subbands are assumed to be ... -
Spectrum trading for non-identical channel allocation in cognitive radio networks
Tehrani, M. N.; Uysal, Murat (IEEE, 2011)In this paper, we investigate spectrum trading via auction approach for cognitive radio networks. We consider a realistic valuation function in terms of different parameters for secondary users (SUs), and propose an efficient ... -
Spectrum trading for non-identical channel allocation in cognitive radio networks
Tehrani, M. N.; Uysal, Murat (IEEE, 2013)In this paper, we investigate spectrum trading via auction approach for exclusive usage spectrum access model in cognitive radio networks. We consider a realistic valuation function which depends on channel capacity, delay ... -
Spectrum trading for risky environments in IEEE 802.22 cognitive networks
Tehrani, M. N.; Uysal, Murat (IEEE, 2011)In this paper, we consider the shared used model in the context of IEEE 802.22 cognitive and investigate spectrum trading via auction approach. We consider two different scenarios in which the dominant risk is either ... -
Standards for indoor optical wireless communications
Boucouvalas, A. C.; Chatzimisios, P.; Ghassemlooy, Z.; Uysal, Murat; Yiannopoulos, K. (IEEE, 2015-03)The application of Optical Wireless Communications (OWC) has grown in recent years that the whole industry would benefit from common standards to which competitive products comply. Standards are essential, particularly ... -
Statistical characterization of FSO-based airborne backhaul links
Elamassie, Mohammed; Uysal, Murat (IEEE, 2023)Backhaul solutions with large capacity and global coverage are of great importance for 6G wireless communication networks. With its ultra-large bandwidth and immunity to electromagnetic interference, free-space optical ... -
Statistical modeling of propagation channels for Terahertz band
Ekti, A. R.; Boyaci, A.; Alparslan, A.; Ünal, İ.; Yarkan, S.; Görçin, A.; Arslan, H.; Uysal, Murat (IEEE, 2017)Digital revolution and recent advances in telecommunications technology enable to design communication systems which operate within the regions close to the theoretical capacity limits. Ever-increasing demand for wireless ... -
Sualtı akustik haberleşmesi için SNR tabanlı röle seçimi kullanan işbirlikli OFDM sistemleri
Karakaya, B.; Sökün, Hamza Ümit; Uysal, Murat; Hasna, M. O. (IEEE, 2012)In this paper, we investigate a multi-carrier multi-relay cooperative system with amplify-and-forward relaying over frequency-selective underwater acoustic channels. Relay selection rules rely on the maximization of ... -
Sualtı işbirlikli OFDM sistemleri için MP-SAGE kanal kestirimi
Erdogan, M.; Şenol, H.; Panayırcı, E.; Uysal, Murat (2013)In this paper, an efficient channel estimation algorithm is proposed for amplify-and-forward (AF) cooperative relay based orthogonal frequency division multiplexing (OFDM) system in the presence of sparse underwater acoustic ... -
Survey on free space optical communication: a communication theory perspective
Khalighi, M. A.; Uysal, Murat (IEEE, 2014)Optical wireless communication (OWC) refers to transmission in unguided propagation media through the use of optical carriers, i.e., visible, infrared (IR), and ultraviolet (UV) bands. In this survey, we focus on outdoor ... -
TG7r1 channel model document for high rate PD communications
Uysal, Murat; Baykas, T.; Miramirkhani, Farshad; Serafimovski, N.; Jungnickel, V. (2015-09-10)Purpose Providing channel models which allow a fair comparison of different physical layer (PHY) High Rate PD Communications proposals submitted to TG7r1 in response to the Call for Proposals (CFP). Notice This document ... -
Transmit laser selection for underwater visible light communication systems
Elamassie, Mohammed; Al-Nahhal, Mohamed; Kızılırmak, R. Ç.; Uysal, Murat (IEEE, 2019)Visible light communication (VLC) has the potential to serve as a high-speed underwater wireless connectivity solution to support real-time image and video transmission. Underwater propagation medium imposes additional ... -
A tutorial on network coded cooperation
Tedik Başaran, S.; Karabulut Kurt, G.; Uysal, Murat; Altunbaş, İ. (IEEE, 2016)Network Coding (NC) can significantly help increase the efficient use of network resources. However, directly applying NC to wireless networks is not an effective design solution. Wireless channels are prone to bit errors ...
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