Browsing Master's Theses by Author "Durak, Kadir"
Now showing items 1-19 of 19
-
Adaptive multiple-input multiple-output (MIMO) techniques for visible light communications
Visible Light Communication (VLC) technology is a promising solution of wireless communication systems in beyond 5G communication networks, which provides low implementation cost, high energy efficiency, and high-speed ... -
Adaptive OFDM-based acoustic underwater transmission: system design and experimental verification
Sadeghi, Mohammad (2017-08)In this study, we design and implement an adaptive Underwater Acoustic (UWA) orthogonal frequency division multiplexing (OFDM) system employing adaptive modulation and transmit power. Recently, UWA communications gain more ... -
A compact circularly polarized monopulse slotted waveguide array for airborne applications
Nawaz, Wasim (2019-10-24)In modern radar and communication systems, high gain, high power capability and low-profile antenna systems are frequently utilized. In airborne and space borne applications, slotted waveguide antenna array is widely used ... -
A custom-design atmospheric channel emulator for the performance evaluation of free space optical communication systems
Kebapçı, Burak (2017-08)The properties of atmospheric chamber and measurement methods that are used in this system are explained and analyzed in detail. We present our own custom design atmospheric channel emulator for FSO system evaluations and ... -
Design and construction of the fundamental tools for single atom experiments
Neutral atoms are one of the most promising systems for quantum information and quantum engineering, in general. Full and efficient control over cold atoms and their interactions with light has been a challenging and ... -
Design of vivaldi antenna operating in two frequency bands with distinct polarizations
This thesis presents a novel dual-polarized antenna design based on two orthogonally place Vivaldi antenna elements and are driven by a specially designed feeding network that splits incoming signal into two wherein one ... -
Effect of colour conversion layer on the optical and thermal efficiency of LED based liquid crystal displays
Bakan, Emrah (2018.05)In light-emitting diode (LED) lit liquid crystal displays (LCD), the colour gamut is related to the back-light unit (BLU) spectrum. The blue LED light is generally converted to green and red bands with phosphor mixtures. ... -
Effects of photon statistics on quantum random number generators and photon detection efficiency
The effects of photon statistics on different quantum applications are explained in this thesis. There are mainly two sections: the first section focuses on the randomly bunched and coherently bunched photons' continuous ... -
Experimental investigation of pointing errors on drone-based FSO systems
Airborne free-space optical (FSO) communication links can be efficiently used for backhaul/fronthaul needs of future cellular networks. Unlike terrestrial FSO links where a fixed connection between two buildings is considered, ... -
Optical quantum dot films for wide color gamut smart phone displays
Mutcu, Süleyman Efdal (2019-05-08)Liquid crystal display (LCD) technology is a fundamental constituent of today’s smart phones for image formation. LCDs are required to have a back light unit (BLU) to create a uniform white light with the correct color ... -
Performance analysis of quantum key distribution in underwater turbulence channels
The current literature on quantum key distribution (QKD) is mainly limited to the transmissions over ber optic, atmospheric or satellite links and are not directly applicable to underwater environments with di erent channel ... -
Performance analysis of vertical underwater visible light communication link
Yılmaz, Anıl (2018-07)Demand for high-bandwidth underwater applications such as image and real-time video transmission, has been increasing parallel to the increase in maritime activities such as environment monitoring, navigation, ocean-pollution ... -
Performance characterization of vehicular visible light communications
Karbalayghareh, Mehdi (2019-07-16)In Intelligent Transportation Systems (ITSs), visible light communication (VLC) has emerged as a powerful candidate to enable wireless connectivity in vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) links. VLC ... -
Pseudothermal light based quantum random number generator
Dandaşi, Abdulrahman (2021-01-18)Random number generators (RNGs) have recently gained lots of attention from the scientific and commercial communities recently. That is due to computers' fast development, making cracking cryptographic systems faster than ... -
Side-channel attack to quantum communications by exploiting electromagnetic radiations of the single photon detectors
Jam, Naser Chamani (2020-08-30)In this thesis an unprecedented cyber-physical attack which can be a game changer in the quantum cryptosystems' security is explained. This attack is the first non-optical patented intercept in quantum field that is based ... -
Simultaneous lightwave information and power transfer in underwater visible light communications
In this thesis, we investigate simultaneous lightwave information and power transfer (SLIPT) for underwater visible light communication systems. We consider four SLIPT methods namely AC-DC separation (ADS), time switching ... -
Small form factor PCB-based air coil for CubeSats
pace missions using Earth's magnetic field to achieve effective attitude determination and control (orientation) is becoming more and more popular at relatively low altitudes, Low Earth Orbit (LEO). CubeSats (U-class ... -
Theory and experiment of a non-radiative wireless power transfer method for a lane moving robot
Today, the usage of robots is growing in the warehouses for automated organizing of goods and in the field for harvesting foods and other agriculture tasks. Many big resellers use robots in their distribution warehouses ... -
Ultraviolet communications for airborne links
Tadayyoniahrab, Hamed (2019-07)In Turkey, artificial insemination is only permitted to couples when they are officially married. Surrogacy, however, has been banned by the law and is illegal as in most European countries. Despite the fact that nowadays ...
Share this page