Search
Now showing items 1-10 of 594
Design and implementation of a general purpose median filter unit in VLSI
(Bilkent University, 1988-10)
The median of a group, containing an odd number of elements, is defined as the middle element, when the elements of the group are sorted. A median filter finds the median of a number of elements at its inputs. Median filters ...
Zone based GLRT for detecting physical random access channel signals in 5G
(Bilkent University, 2020-01)
In LTE/5G systems, the random access channel (RACH) process occurs during
the boot-up phase. As channel state information is not available at this stage,
detecting several devices with high performance presents a challenging ...
Rapid reconstruction for parallel magnetic resonance imaging with non-Cartesian variable-density sampling trajectories
(Bilkent University, 2020-02)
Due to long acquisition times, the use of magnetic resonance imaging (MRI) remains challenging in some applications. Variable-density acquisitions enable scan acceleration while maintaining a desirable trade-off between ...
Analytical model and design of load modulated balanced amplifier
(Bilkent University, 2020-02)
RF power amplifiers (PA) with high efficiency and linearity are in high demand for modern communication systems. Modulated signals having a high peakto-average power ratio (PAPR) require PA’s to maintain these features in the ...
New approach for designing cVEP BCI stimuli based on superposition of edge responses
(Bilkent University, 2020-01)
Electroencephalography (EEG) based brain-computer interfaces (BCIs) are widely used in the field of neural engineering, due to their portability, noninvasive nature, and high temporal resolution properties. Among the different ...
Cost constrained sensor selection and design for binary hypothesis testing
(Bilkent University, 2020-03)
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 ...
Rapid and robust image reconstruction for magnetic particle imaging
(Bilkent University, 2020-07)
Magnetic Particle Imaging (MPI) is a rapidly developing medical imaging modality, which can image with high resolution, contrast, and sensitivity the spatial distribution of superparamagnetic iron oxide nanoparticles. ...
Dielectric metasurfaces as passive radiative coolers, colorimetric refractive index sensors, color filters, and one-way perfect absorber/reflectors with transparent sidebands
(Bilkent University, 2020-07)
Metamaterials define the class of synthetic, man-made materials with exotic properties that cannot be observed with natural materials. Their sub-wavelength counterparts are called metasurfaces. In particular, dielectric ...
GaN HEMT based MMIC design and fabrication for Ka-band applications
(Bilkent University, 2020-08)
Gallium Nitride (GaN) technology has recently dominated the high power applications in the mm-wave frequencies, and its commercial use is emerging with the upcoming 5G technology. High Electron Mobility Transistors (HEMTs) ...
Polar Reed-Solomon concatenated codes for optical communications
(Bilkent University, 2020-08)
A concatenated forward error correcting (FEC) code is developed by targeting optical communications. Polar and product Reed-Solomon (RS) codes are used as inner and outer codes, respectively. An interleaver block is designed ...