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Israfil Bahceci
Ericsson
37Publications
10H-index
757Citations
Publications 21
Newest
#1Ahmet Zahid Yalcin (TOBB University of Economics and Technology)H-Index: 2
#2Melda Yuksel (TOBB University of Economics and Technology)H-Index: 3
Last.Israfil Bahceci (Ericsson)H-Index: 10
view all 3 authors...
In this paper, a downlink wireless communication channel is considered. The base station (BS) has common data for all users, unicast data for a set of intended users, and transmits the superposition of these messages. This setting neither falls into the non-orthogonal multiple access (NOMA) nor into the multi-group multicasting literatures. In NOMA systems, the BS has unicast data for all users, and multiple users share the same resources. In multi-group multicasting, there are non-overlapping g...
3 CitationsSource
#1Mehedi Hasan (Marvell Technology Group)H-Index: 2
#2Israfil Bahceci (Ericsson)H-Index: 10
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 5 authors...
Space-shift-keying (SSK) and spatial modulation (SM) enable multiple antenna transmission systems to convey information on antenna indices. While SSK/SM helps reduce the number of radio frequency (RF) chains, large numbers of antennas and low spatial correlations are required to achieve high data rates. This work investigates the use and design of multifunctional reconfigurable antennas (MRAs) for SSK/SM based transmission where a single-element MRA generates large numbers of modes. To enhance l...
1 CitationsSource
#1Mehedi Hasan (USU: Utah State University)H-Index: 2
#2Israfil Bahceci (Ericsson)H-Index: 10
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 3 authors...
MU-MIMO transmission relies on exploiting multi-user diversity among a multitude of users. In this paper, to enhance MU-MIMO transmission, techniques for designing and exploiting reconfigurable antennas (RAs) are developed. A single-element RA is capable of generating modes with different radiation pattern and polarization states resulting in multiple different channel states for each user. This capability expands the search space for user-pairing optimization. To reduce complexity, an iterative...
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#1Md. Asaduzzaman Towfiq (USU: Utah State University)H-Index: 2
#2Israfil Bahceci (Ericsson)H-Index: 10
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 6 authors...
A reconfigurable antenna (RA) capable of steering its beam into the hemisphere corresponding to \theta \in {−40°, 0°, 40°}, \phi \in {0°, 45°, 90°, −45°}, and of changing 3 dB beamwidth, where \theta _{3\,\text {dB}} \in (40°, 100°), \phi \in {45°, 90°, −45°} for broadside direction is presented. The RA operating in 5 GHz band consists of a driven patch antenna with a parasitic layer placed above it. The upper surface of the parasitic layer has two pixelated metallic strips, where ea...
7 CitationsSource
#1Mohammad Ababil Hossain (USU: Utah State University)H-Index: 1
#2Israfil Bahceci (USU: Utah State University)H-Index: 10
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 3 authors...
The design, prototyping, and characterization of a radiation pattern reconfigurable antenna (RA) targeting 5G communications are presented. The RA is based on a reconfigurable parasitic layer technique in which a driven dipole antenna is located along the central axis of a 3-D parasitic layer structure enclosing it. The reconfigurable parasitic structure is similar to a hexagonal prism, where the top/bottom bases are formed by a hexagonal domed structure. The surfaces of the parasitic structure ...
12 CitationsSource
Mar 1, 2017 in WCNC (Wireless Communications and Networking Conference)
#1Israfil Bahceci (USU: Utah State University)H-Index: 10
#2Mehedi Hasan (USU: Utah State University)H-Index: 2
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 3 authors...
This paper proposes an efficient downlink multi- user MIMO (MU-MIMO) scheme for multiple antenna transmission systems comprised of reconfigurable antenna (RA) elements. MU-MIMO schemes typically require a combined user pairing and precoding scheme where the channels of the selected users have to satisfy certain conditions to reduce interference among the users. Therefore, MU-MIMO typically requires a large number of users so that suitable user-tuples can be found. In this work, instead of relyin...
2 CitationsSource
#1Israfil Bahceci (USU: Utah State University)H-Index: 10
#2Mehedi Hasan (USU: Utah State University)H-Index: 2
Last.Bedri A. Cetiner (USU: Utah State University)H-Index: 19
view all 4 authors...
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 capabilities. However, in coherent communication systems, using MR-MIMO antennas with a large number of operational modes may incur prohibitive complexity due to the need for channel state estimation for each mode. To address this issue, we derive an explicit relation among the ...
4 CitationsSource
2 CitationsSource
#1Enes Aydin (As: ASELSAN)
#2Israfil BahceciH-Index: 10
Over-the horizon wireless communications within the HF-band is subject to the Faraday effect where the polarization of electromagnetic waves rotates due to the ionization and geomagnetic interactions. This results in further signal loss and fading in addition to the usual multi path propagation fading. In this work, based on the standard Watterson HF channel model, a new HF-MIMO fading channel model is developed that takes into account the radiation patterns of transmit and receive antennas, and...
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May 1, 2015 in SIU (Signal Processing and Communications Applications Conference)
#2Ali Cafer GurbuzH-Index: 15
Last.Israfil BahceciH-Index: 10
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Non-linear junction detectors (NLJD) are used for detecting objects which contain p-n junction or corrosive materials (m-m junction) in a target area. P-n junctions are mostly included in electronic circuits which may contain diodes, transistors, amplifiers etc. Typical NLJDs employ harmonic radar principles where the 2 nd and 3 rd harmonics created by the target area after illumination by a sinusoidal signal are compared to distinguish whether a p-n or m-m junction or nothing at all exists in t...
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