Departments
Now showing items 1-20 of 742
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2-18 GHZ MMIC distributed amplifiers
(Bilkent University, 1994)Using GaAs Monolithic Microwave Integrated Circuit (MMIC) technology three distributed amplifiers are realized. Two of these amplifiers employ single gate FETs and operate in the 2-18 GHz frequency range. They have 4.5 ... -
3-dimensional median-based algorithms in image sequence processing
(Bilkent University, 1990)This thesis introduces new 3-dimensional median-based algorithms to be used in two of the main research areas in image sequence proc(',ssi,ng; image sequence enhancement and image sequence coding. Two new nonlinear filters ... -
3D dynamic modeling of spherical wheeled self-balancing mobile robot
(Bilkent University, 2012)In recent years, dynamically stable platforms that move on spherical wheels, also known as BallBots, gained popularity in the robotics literature as an alternative locomotion method to statically stable wheeled mobile ... -
3D electron density estimation in the ionosphere by using IRI-Plas model and GPS measurements
(Bilkent University, 2016-05)Three dimensional imaging of the electron density distribution in the ionosphere is a crucial task for investigating the ionospheric effects. Dual-frequency Global Positioning System (GPS) satellite signals can be used ... -
3D model compression using image compression based methods
(Bilkent University, 2007)A Connectivity-Guided AdaptiveWavelet Transform (CGAWT) based mesh compres- sion algorithm is proposed. On the contrary to previous work, the proposed method uses 2D image processing tools for compressing the mesh models. ... -
3D reconstruction of point clouds using multi-view orthographic projections
(Bilkent University, 2006)A method to reconstruct 3D point clouds using multi-view orthographic projections is examined. Point clouds are generated by means of a stochastic process. This stochastic process is designed to generate point clouds ... -
A 94-GHz phase inverter-variable gain amplifier in SiGe BiCMOS
(Bilkent University, 2017-08)Phased array radar systems are capable of steering the beam of radio waves electronically by adjusting the gain and phase of each antenna element as desired. In order to achieve that, each element has to have gain/phase ... -
Ablation cooled material removal with bursts of ultrafast pulses
(Bilkent University, 2016-01)Material processing with femto-second pulses allows precise and non-thermal material removal and being widely used in scientific, medical and industrial applications. However, due to low ablation speed at which material ... -
Accurate and efficient solutions of electromagnetic problems with the multilevel fast multipole algorithm
(Bilkent University, 2009)The multilevel fast multipole algorithm (MLFMA) is a powerful method for the fast and efficient solution of electromagnetics problems discretized with large numbers of unknowns. This method reduces the complexity of ... -
Activity management algorithm for improving energy efficiency of small cell base stations in 5G heterogeneous networks
(Bilkent University, 2014)Heterogeneous networks (HetNets) are proposed in order to meet the increasing demand for next generation cellular wireless networks, but they also increase the energy consumption of the base stations. In this thesis, an ... -
Activity recognition invariant to position and orientation of wearable motion sensor units
(Bilkent University, 2019-04)We propose techniques that achieve invariance to the placement of wearable motion sensor units in the context of human activity recognition. First, we focus on invariance to sensor unit orientation and develop three ... -
Adaptive ambulance redeployment via multi-armed bandits
(Bilkent University, 2019-09)Emergency Medical Services (EMS) provide the necessary resources when there is a need for immediate medical attention and play a signi cant role in saving lives in the case of a life-threatening event. Therefore, it is ... -
Adaptive control of a one-legged hopping robot through dynamically embedded spring-loaded inverted pendulum template
(Bilkent University, 2011)Practical realization of model-based dynamic legged behaviors is substantially more challenging than statically stable behaviors due to their heavy dependence on second-order system dynamics. This problem is further ... -
Adaptive digital predistortion for linearization of power amplifier
(Bilkent University, 2009)In most communication systems, power amplifiers are used to obtain high output power. The nonlinear characteristics of the power amplifier leads to the distortion of the output signal. This distortion affects the efficiency ... -
Adaptive digital predistortion for power amplifier linearization
(Bilkent University, 2008)High power amplification of linear modulation schemes which exhibit fluctuating envelopes, invariably leads to the generation of distortion and intermodulation products. In order to avoid these effects, maintaining both ... -
Adaptive energy management for solar energy harvesting wireless sensor nodes
(Bilkent University, 2018-09)Wireless Sensor Networks (WSN) will have a key role in the upcoming era of the Internet of Things (IoT) as they will be forming the basis of communication infrastructure. Energy harvesting has been a widely used instrument ... -
Adaptive prediction and vector quantization based very low bit rate video codec
(Bilkent University, 1993) -
Adaptive two-time-scale position control of multiple flexible manipulators
(Bilkent University, 1994)An adaptive self-tuning control scheme is developed in the independent generalized coordinates for position control of multiple flexible manipulators. First, a suitable model is derived for multiple cooperating manipulators ... -
Advanced asynchronous random access protocols
(Bilkent University, 2020-08)Fifth generation wireless systems and beyond require linking an enormous number of simple machine type devices leading to a new wave of interest in massive machine type communications (mMTC). Different from the human-centric ... -
Airborne cmut cell design
(Bilkent University, 2014)All transducers used in airborne ultrasonic applications, including capacitive micromachined ultrasonic transducers (CMUTs), incorporate loss mechanisms to have reasonably wide frequency bandwidth. However, CMUTs can yield ...
