Browsing by Keywords "MIMO"
Now showing items 1-13 of 13
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Antenna analysis
(Bilkent University, 2009)Multiple-input-multiple-output (MIMO) wireless communication systems have been attracting huge interest, since a boost in the data rate was shown to be possible, using multiple antennas both at the transmitter and receiver. ... -
Efficient channel estimation for reconfigurable MIMO antennas: training techniques and performance analysis
(Institute of Electrical and Electronics Engineers Inc., 2017)Multifunctional and reconfigurable multiple-input multiple-output (MR-MIMO) antennas are capable of dynamically changing the operation frequencies, polarizations, and radiation patterns, and can remarkably enhance system ... -
Faz-MIMO sistemlerinde geliş açısı kestirim performansı karşılaştırması
(IEEE, 2021-07-19)Bu çalışmada, literatürde yer alan Fazlı Çoklu Giriş-Çoklu Çıkış (Fazlı-MIMO) dizi konsepti ile Sıkıştırılmış Algılama (SA) teknikleri ilk defa birlikte ele alınarak bir radar sisteminde çoklu hedefler için geliş açısı ... -
Investigation of planar and conformal printed arrays for MIMO performance analysis
(IEEE, 2006)MIMO channel capacity of printed arrays with dipole elements is analyzed. A MIMO channel model based on electric fields is used. The effects of mutual interactions among the array elements through space and surface waves ... -
A model with electric fields for the inclusion of mutual coupling effects in the MIMO channel
(IEEE, 2007)Multiple input multiple output (MIMO) wireless communication systems have been a focus of interest, due to their ability to increase the capacity in rich scattering environments by using multi-element antenna arrays both ... -
Multi-input multi-output deletion channel
(Institute of Electrical and Electronics Engineers, 2012)We describe a new channel model suitable in certain applications, namely the multi-input multi-output (MIMO) deletion channel. This channel models the scenarios where multiple transmitters and receivers suffering from ... -
Optimization of linear wire antenna arrays to increase MIMO capacity using swarm intelligence
(Institution of Engineering and Technology, 2007)Free standing linear arrays (FSLA) are analyzed and optimized to increase MIMO capacity. A MIMO channel model based on electric fields is used. The effects of mutual interactions among the array elements are included into ... -
An overview of physical layer security with finite-alphabet signaling
(Institute of Electrical and Electronics Engineers Inc., 2019)Providing secure communications over the physical layer with the objective of achieving secrecy without requiring a secret key has been receiving growing attention within the past decade. The vast majority of the existing ... -
Particle swarm optimization for SAGE maximization step in channel parameter estimation
(IET, 2007-11)This paper presents an application of particle swarm optimization (PSO) in space alternating generalized expectation maximization (SAGE) algorithm. SAGE algorithm is a powerful tool for estimating channel parameters like ... -
Particle swarm optimization of dipole arrays for superior MIMO capacity
(WILEY, 2009)The particle swarm optimization (PSO) technique is employed to design MIMO arrays for superior capacity. A channel model based on the method of moments solution of the electric field integral equation is utilized with PSO ... -
A Performance comparision of polar codes with convolutional turbo codes
(Bilkent University, 2009)Polar codes introduced recently by Arıkan are the first low-complexity codes achieving symmetric capacity for arbitrary binary-input discrete memoryless channels (B-DMCs). Although being theoretically significant, their ... -
Search-free precoder selection for 5G new radio using neural networks
(IEEE, 2020-12)We propose a search-free precoder selection method with neural networks motivated by the fact that large codebook sizes are adopted in 5G New Radio (5G-NR). The proposed method does not require an explicit codebook search ... -
V-BLAST/MAP : a new symbol detection algorithm for mimo channels
(Bilkent University, 2005)In this thesis, we introduce a new symbol detection algorithm for MIMO channels. This algorithm is an extension of the well-known V-BLAST algorithm. The new algorithm, V-BLAST/MAP, combines elements of the V-BLAST ...
