Bölüm "İstanbul Medipol Üniversitesi, Fen Bilimleri Enstitüsü, Elektrik ve Elektronik Mühendisliği ve Siber Sistemler Ana Bilim Dalı" Enstitüler için listeleme
Toplam kayıt 44, listelenen: 21-40
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Extending light field camera capabilities
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)A traditional camera captures an image by projecting a scene on a two-dimensional image sensor plane regardless of the direction light rays coming onto the sensor. A light field camera, in contrast, records light rays in ... -
Extracting sub-exposure images from a single capture through fourier-based optical modulation
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)Through pixel-wise optical coding of images during exposure time, it is possible to extract sub-exposure images from a single capture. Such a capability can be used for different purposes, including high-speed imaging, ... -
FM band channel measurements and modelling
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)As the demand for higher data rates increases every day, the need for new frequency bands becomes more and more prominent. The FM band between 88 and 108 MHz is one of the bands that are not fully utilized. This band for ... -
A high-resolution time to digital converter design for all digital phase-locked loops
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2021)Phase-locked loops are one of the most significant modules that are used not only for communication circuits but also in other fields like biomedical and computer sciences. There are many types of PLLs such as Analog, ... -
Image enhancement through new techniques in computational photography
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2019)Quality of a digital image depends on several factors operative during the image formation process, e.g. sensor defects, sensor dynamic range, poor spatial resolution,lens distortion, camera shake and object motion. This ... -
Interference and channel control techniques for the future of wireless communications
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)Interference and random behavior of the propagation environment are the main impediments to serve a broad range of applications and use-cases in modern communication systems. Although conventional orthogonal multiple ... -
Mutual coupling compensation in arrays and its implementation on software defined radios
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2021)Mutual coupling in antenna arrays is a classical problem that has been researched for sev eral decades. This thesis presents two different algorithms along with their experimental verification by developing two different ... -
Neural network-based adaptive myoelectric signal classification via utilization of entropy history
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)The surface electromyography (sEMG) signals emanating from the remnant forearm muscles of transradial amputees are eligible for controlling robotic prostheses to replace the functions of the lost hand. sEMG pattern recognition ... -
NOMA multi-numerology and guard reduction methods in OFDM systems for 5g networks
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)Non-orthogonal multiple access (NOMA) is a promising technique which outperforms the traditional multiple access schemes in many aspects. It uses superposition coding (SC) to share the available resources among the users ... -
OFDM with index modulation for narrowband iot and mmtc
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2018)The crucial aim for 5G narrowband Internet of Things (NB-IoT) is to support massive Machine-Type Communications (mMTC) with wide coverage area, low power consumption, low hardware complexity and low data rate. Direct ... -
On the design of a flexible waveform and low ici symbol boundary alignment
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)Cellular systems of fifth generation (5G) radio access technology is expected to support a wide variety of service requirements in different applications. High reliability, flexibility, spectral efficiency, and low power ... -
Parallelized cyber reconnaissance automation: A real-time and scheduled security scanner
(İstanbul Medipol Üniversitesi, Fen Bilimleri Enstitüsü, 2022)The extraordinary advancement of technology has increased the importance of achieving the required level of information security, which is still difficult to achieve. Recently, network and web application attacks have ... -
Path loss prediction from heightmap using deep learning
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2021)Wireless channel parameters of a region are required for a successful network planning. Sufficient information about those parameters can be obtained by either actual measurements or ray-tracing simulations that use 3D ... -
Physical layer security schemes for wireless communication systems
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2016)Security in wireless communications has always been a major concern due to the broadcast nature of the radio waves. Apart from the conventional cryptologic methods that are performed in the upper layers, physical-layer ... -
Physical layer security techniques for future wireless communication systems against eavesdropping
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2020)The inherent broadcast characteristics of wireless communication make it vulnerable to passive eavesdropping. Conventionally, security techniques in the upper layers like cryptography-based techniques have been employed ... -
The problems of common criteria evaluation for hospital information management systems in Turkey
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2019)Hospital information management systems (HIMS) are essential tool for hospitals not only for the management of the hospital but also for improving healthcare quality and efficiency. The developed countries set national and ... -
RSS-based wireless LAN indoor localization and tracking using deep architectures
(MDPI, 2022)Wireless Local Area Network (WLAN) positioning is a challenging task indoors due to environmental constraints and the unpredictable behavior of signal propagation, even at a fixed location. The aim of this work is to develop ... -
Scattering from a chiral cylinder of arbitrary cross-section above a dielectric half-space
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2021)A simple numerical solution for electromagnetic scattering from a two dimensional (2-D) homogeneous chiral cylinder of arbitrary cross-section placed above a dielectric half-space is presented. The surface equivalence ... -
Scattering from a chiral cylinder of arbitrary cross-section above a ground plane
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2021)In this dissertation, a simple, accurate, and efficient solution is presented for the problem of scattering from a chiral cylinder of arbitrary cross-section above a ground plane. Both TM and TE excitations are considered. ... -
Signal processing techniques for security enhancement of wireless networks at the physical layer
(İstanbul Medipol Üniversitesi Fen Bilimleri Enstitüsü, 2017)Broadcast nature of wireless communications enables reaching multiple parties simultaneously. However, due to this property, the security of information trans- mission is prone to eavesdropping of unauthorized receivers. ...