Browsing by Department "Enstitüler, Lisansüstü Eğitim Enstitüsü, Elektronik Mühendisliği Ana Bilim Dalı"
Now showing items 21-34 of 34
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Performance of ieee 802.11af systems under realistic channel conditions
(Kadir Has Üniversitesi, 2016)As the analog TV broadcasting channels have become less frequently used in the last decade there has been a great interest in these frequency bands for the deployment of regional local and personal area networks. Among ... -
Performance of orbital angular momentum based communication systems under varied atmospheric turbulence
(Kadir Has Üniversitesi, 2016)Orbital Angular Momentum is gaining a lot of attention in the past years as it is providing the means to break free from the ever increasing shortage of options when it comes to Data Rates and Effective Frequency Utilization. ... -
Phase noise estimation for wireless communication systems
(Kadir Has Üniversitesi, 2011)in wireless communication systems information symbols are transmitted through a communication channel which are affected many degradation factors. Besides fading and multipath effect of channel transmitted symbols are ... -
Physical layer security and channel estimation in optical generalized index-modulated ofdm system
(Kadir Has Üniversitesi, 2022-01)Visible light communication (VLC) is a promising and not completely discovered technology for next-generation wireless communication systems. In this thesis, gen eralized LED index modulation (GLIM-OFDM), which is a new ... -
Physical layer security in the visible light communications systems
(Kadir Has Üniversitesi, 2020)With the rapid developments in technology in recent years, the need for fast and secure access to information has been increasing day by day. With this increasing demand, the radio frequency (RF) band which used for wireless ... -
Power control and multihop communication approaches for the coexistence of ieee 802.11af and iEEE 802.22 networks in tv white space
(Kadir Has Üniversitesi, 2017)Communication networks have been among the most important research fields of scientists in the recent years. Researches have been conducted in various different topics and contents as technology has evolved. As some new ... -
Practical implementation of combinational cooperative detection method
(Kadir Has Üniversitesi, 2012)in conventional cooperative detection a fusion center decides on the presence or theabsence of the primary user by gathering all the information from the secondaryusers (SUs) and conveys this decision to all users. This ... -
Primary user detection in Ultrawide-band based wireless sensor networks
(Kadir Has Üniversitesi, 2013)in this thesis ultra-wideband (UWB) based wireless sensor networks (WSNs) are considered for the detection of a primary user. Different from earlier works (i) both uplink and downlink information of the primary user are ... -
Real frequency design of narrowband impedance equalizer with complex terminations
(Kadir Has Üniversitesi, 2018)in this thesis the real frequency design of L Pi and T type networks with complex terminations has been analyzed. The main purpose of the proposed approach is to compare the existing methods against the proposed method on ... -
Realistic performance considerations for combinational cooperative detection method
(Kadir Has Üniversitesi, 2016)Combinational cooperative detection (CCD) method is different from the conventional cooperative detection method in the sense that each user may reach a different decision for the activity of the primary user. in the CCD ... -
Scattering transfer matrix factorization based synthesis of resistively terminated LC ladder networks
(Kadir Has Üniversitesi, 2011)Bu yüksek lisans tezimde, direnç ile sonlandırılmış LC merdiven devrelerin sentezi için algoritmalr önerilmiştir. Bu algoritmalar saçılma transfer matrisi faktorizasyonuna dayanır. Alçak-geçiren, yüksek-geçiren, band-geçiren ... -
SCMA codebook design approaches
(Kadir Has Üniversitesi, 2020)In 4G systems, Orthogonal Frequency-Division Multiple Access (OFDMA) has been used conventionally for multiple access purposes. This technique has low spectral efficiency since it allocates the resources orthogonally to ... -
Semi persistent radio resource allocation for machine type communications in 5g and beyond cellular networks
(Kadir Has Üniversitesi, 2018)The fast growth of machine-to-machine (M2M) communications in cellular networks brings the challenge of satisfying diverse Quality-of-Service (QoS) requirements of massive number of machine type communications (MTC) devices ... -
Sparse channel estimation and data detection algorithms for ofdm-based underwater acoustic communication systems
(Kadir Has Üniversitesi, 2018)Communication over acoustic signals in underwater results into a multi-scale multilag channels which occurs due to the multipath propagation. Hence a robust channel estimation technique has to be present at the receiver ...