Advisors
Now showing items 1-20 of 31
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5G PDSCH: performance analysis of DMRS and PTRS designs for channel and phase noise estimation in MM-WAVE
(Bilkent University, 2021-08)The mm-Wave is one of the main enablers for the performance requirements of 5G. Although it provides communication systems with huge bandwidth and data rates, it also has some disadvantages as the carrier frequencies can ... -
Alternative approaches and noise benefits in hypothesis-testing problems in the presence of partial information
(Bilkent University, 2011)Performance of some suboptimal detectors can be enhanced by adding independent noise to their observations. In the first part of the dissertation, the effects of additive noise are studied according to the restricted ... -
Centralized and decentralized detection with cost-constrained measurements
(Bilkent University, 2016-05)In this thesis, optimal detection performance of centralized and decentralized detection systems is investigated in the presence of cost constrained measurements. For the evaluation of detection performance, Bayesian, ... -
Clutter detection in pulse-doppler radar systems
(Bilkent University, 2010)Among various types of radar systems, the pulse-Doppler radar is the most widely used one, especially in military applications. Pulse Doppler radars have a primary objective to detect and estimate the range and the radial ... -
Cooperative visible light positioning systems
(Bilkent University, 2017-12)Light emitting diode (LED) based visible light positioning (VLP) systems o er an alternative approach to commonly used radio frequency (RF) based positioning systems. In the literature, VLP studies are performed only for ... -
Cost constrained sensor selection and design for binary hypothesis testing
(Bilkent University, 2020-01)We consider a sensor selection problem for binary hypothesis testing with costconstrained measurements. Random observations related to a parameter vector of interest are assumed to be generated by a linear system corrupted ... -
Doppler frequency estimation in pulse doppler radar systems
(Bilkent University, 2009)Pulse Doppler radar systems are one of the most common types of radar systems, especially in military applications. These radars are mainly designed to estimate two basic parameters of the targets, range and Doppler ... -
Estimation theoretic analyses of location secrecy and ris-aided localization under hardware impairments
(Bilkent University, 2022-06)In this thesis, we present estimation theoretic analyses of location secrecy and reconfigurable intelligent surface (RIS) aided localization under hardware impairments. First, we consider a wireless source localization ... -
Fundamental limits on localization in single input multiple output visible light systems
(Bilkent University, 2017-09)Visible light systems have recently been considered as an e ective and promising solution for indoor positioning. In this thesis, a theoretical accuracy analysis is conducted for position estimation in visible light ... -
Implementation of a coded-reference ultra-wideband system
(Bilkent University, 2011)Coded-reference ultra-wideband (CR UWB) systems provide orthogonalization of the reference and data signals in the code domain to facilitate communications without the need for complex channel estimation and have ... -
Jammer placement algorithms for wireless localization systems
(Bilkent University, 2016-07)The optimal jammer placement problem is proposed and analyzed for wireless localization systems. In particular, the optimal location of a jammer node is obtained by maximizing the minimum of the Cram´er-Rao lower bounds ... -
Noise benefits in joint detection and estimation systems = Birlikte sezim ve kestirim sistemlerinde gürültünün faydaları
(Bilkent University, 2014)Adding noise to inputs of some suboptimal detectors or estimators can improve their performance under certain conditions. In the literature, noise benefits have been studied for detection and estimation systems separately. ... -
Noise enhanced detection
(Bilkent University, 2009)Performance of some suboptimal detectors can be improved by adding independent noise to their measurements. Improving the performance of a detector by adding a stochastic signal to the measurement can be considered in ... -
Noise enhanced detection in restricted Neyman-Pearson framework
(Bilkent University, 2013)Hypothesis tests frequently arise in many different engineering problems. Among the most frequently used tests are Bayesian, minimax, and Neyman-Pearson. Even though these tests are capable of addressing many real-life ... -
Noise enhanced parameter estimation using quantized observations
(Bilkent University, 2010)In this thesis, optimal additive noise is characterized for both single and multiple parameter estimation based on quantized observations. In both cases, first, optimal probability distribution of noise that should be added ... -
Optimal detector randomization in cognitive radio receivers in the presence of imperfect sensing decisions
(Bilkent University, 2013)In cognitive radio systems, spectrum sensing is one of the crucial tasks to be performed by secondary users in order to limit the interference to primary users. Therefore various spectrum sensing methods have been proposed ... -
Optimal parameter encoding strategies for estimation theoretic secure communications
(Bilkent University, 2019-12)Physical layer security has gained a renewed interest with the advances in modern wireless communication technologies. In estimation theoretic security, secrecy levels are measured via estimation theoretic tools and ... -
Optimal power allocation techniques for vector parameter estimation with Fisher information based objectives
(Bilkent University, 2021-06)In this thesis, optimal power allocation problems are investigated for vector parameter estimation according to various Fisher information based optimality criteria. By considering a generic observation model involving a ... -
Optimal signal design for visible light positioning under power and illumination constraints
(Bilkent University, 2021-11)The optimal design of transmit signals for light-emitting diodes (LEDs) in a visible light positioning (VLP) system is analyzed with the objectives of im-provements in localization accuracy and power efficiency. Specifically, ... -
Optimal stochastic approaches for signal detection and estimation under inequality constraints
(Bilkent University, 2012)Fundamental to the study of signal detection and estimation is the design of optimal procedures that operate on the noisy observations of some random phenomenon. For detection problems, the aim is to decide among a number ...
