Search query: muhammet emin yanik

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abstract: Recent progress in complementary metal oxide semiconductor (CMOS) based frequency modulated continuous wave (FMCW) radars has made it possible to design low cost and low power millimeter wave (mmWave) sensors. As a result, there is a strong desire to exploit the progress in mmWave sensors in wide range of imaging applications including medical, automotive, and security. In this paper, we present a low cost high resolution mmWave imager prototype that combines commercially available 77 GHz system on chip FMCW radar sensors and synthetic aperture radar (SAR) signal processing techniques for concealed item detection. To create a synthetic aperture over a target scene, the imager is constructed with a two axis motorized rail system which can synthesize a large aperture in both horizontal and vertical directions. Our prototype system is described in detail along with signal processing techniques for two dimensional (2 D) image reconstruction. The imaging examples of concealed items in various scenarios confirm that our low cost prototype has a great potential for high resolution imaging tasks in security applications.
author_names: Muhammet Emin Yanik

Murat Torlak
title: Near Field 2 D SAR Imaging by Millimeter Wave Radar for Concealed Item Detection
venue: 2019 IEEE Radio and Wireless Symposium (RWS)
year: 2019

abstract: The primary challenge of a cost effective and low complexity near field millimeter wave (mmWave) imaging system is to achieve high resolution with a few antenna elements as possible. Multiple input multiple output (MIMO) radar using simultaneous operation of spatially diverse transmit and receive antennas is a good candidate to increase the number of available degrees of freedom. On the other hand, higher integration complexity of extremely dense transceiver electronics limits the use of MIMO only solutions within a relatively large imaging aperture. Hybrid concepts combining synthetic aperture radar (SAR) techniques and sparse MIMO arrays present a good compromise to achieve short data acquisition time and low complexity. However, compared with conventional monostatic sampling schemes, image reconstruction methods for MIMO SAR are more complicated. In this paper, we propose a high resolution mmWave imaging system combining 2 D MIMO arrays with SAR, along with a novel Fourier based image reconstruction algorithm using sparsely sampled aperture data. The proposed algorithm is verified by both simulation and processing real data collected with our mmWave imager prototype utilizing commercially available 77 GHz MIMO radar sensors. The experimental results confirm that our complete solution presents a strong potential in high resolution imaging with a significantly reduced number of antenna elements.
author_names: Muhammet Emin Yanik

Murat Torlak
title: Near Field MIMO SAR Millimeter Wave Imaging With Sparsely Sampled Aperture Data
venue: IEEE Access
year: 2019

abstract: Objective: A significant proportion of nosocomial infections resulting in significant mortality and morbidity for hospitalized patients are due to the patients in intensive care units (ICU) For this reason, the identification and detection of antimicrobial resistance in the microorganisms that are isolated from ICU patients is of great importance for successful treatment. Therefore, in this study, it was aimed to evaluate Gram negative bacilli (GNB) isolated from patients in ICU of Erzurum Regional Training and Research Hospital, Turkey. Materials and Methods: A total of 327 GNB isolated from the clinical specimens of patients in ICU between January 2015 and January 2016 were evaluated. The conventional methods and the Kirby Bauer disc diffusion method (if necessary assisted with Vitek 2 automated system) were used for the identification and detection of antimicrobial susceptibility of isolated microorganisms. Antibiotic susceptibility tests were interpreted according to EUCAST criteria. Results: Of the 327 GNB, 218 were nonfermentative and 109 were Enterobacteriaceae spp. The most frequently isolated microorganisms were Acinetobacter baumannii and Klebsiella pneumoniae, respectively. The microorganisms were mostly isolated from respiratory tract samples and blood cultures. All of A. baumannii and Pseudomonas aeruginosa strains were *Hastane Infeksiyonlari Egitim Programi 2017'de (HIEP 2017) poster olarak sunulmustur. Poster No.002 (12 16 Nisan 2017, Ankara)
author_names: Muhammet Emin Naldan

Mehmet Coskun

Onur Unal

Omer Karasahin

Mete Koray Vural
title: Evaluation of Gram Negative Bacilli Isolated from Patients in Intensive Care Units
year: 2017

abstract: This paper presents the trade off between the array gain and the diversity loss in doubly correlated multiple input multiple output (MIMO) channels. In general, the array gain increases with increasing correlation at either side of the MIMO system. However, the bit error probability performance, i.e. the diversity gain, degrades with increasing correlation at either side of the MIMO system. However, the effects of correlation on the array and the diversity gains and the associated trade offs are not yet investigated in doubly correlated MIMO channels. The contribution of this paper is to determine the correlation regions in doubly correlated MIMO channels providing the optimum trade off between array and diversity gains.
author_names: Seckin Anil Yildirim

Mehmet S;afak

Muhammet Emin Yanik
title: Diversity loss array gain tradeoff in doubly correlated MIMO beamforming systems
venue: 2010 IEEE 18th Signal Processing and Communications Applications Conference
year: 2010

abstract: Integration of multi chip cascaded multiple input multiple output (MIMO) millimeter wave (mmWave) sensors with synthetic aperture radar (SAR) imaging will enable cost effective and scalable solutions for a variety of applications including security, automotive, and surveillance. In this paper, the first three dimensional (3 D) holographic MIMO SAR imaging system using cascaded mmWave sensors is designed and implemented. The challenges imposed by the use of cascaded mmWave sensors in high resolution MIMO SAR imaging systems are discussed. Especially, important signal processing functions such as near field multistatic image reconstruction suitable for large MIMO apertures, multi channel array calibration, spatial sampling, and image resolution are presented in the context of 3 D MIMO SAR imaging. The prototyped 3 D MIMO SAR imaging system is described in detail, along with various real imaging results.
author_names: Muhammet Emin Yanik

Dan Wang

Murat Torlak
title: 3 D MIMO SAR Imaging Using Multi Chip Cascaded Millimeter Wave Sensors
venue: 2019 IEEE Global Conference on Signal and Information Processing (GlobalSIP)
year: 2019

abstract: Sky tracking of permanent radio astronomical sky sources has been shown to be a promising alternative method to global positioning system (GPS) especially when GPS signals are either unavailable or may have been compromised. On the other hand, radio astronomical observations are increasingly corrupted by man made radio frequency interference (RFI) In this paper, radio astronomical geolocalization is investigated from the viewpoint of wideband measurements while combating RFI. The proposed geolocalization algorithm is designed as a joint iterative visibility phase reconstruction and localization algorithm based on unconstrained minimization. The effectiveness of the proposed algorithm is validated using simulated data. This approach can be extended to enable similar geolocating capability to ground based objects such as rovers, etc. on other celestial bodies in the solar system where there are no orbiting satellites like GPS.
author_names: Muhammet Emin Yanik

Murat Torlak
title: Geolocalization via tracking of wideband radio astronomical sources in the presence of radio frequency interference
venue: 2018 IEEE/ION Position, Location and Navigation Symposium (PLANS)
year: 2018

abstract: Isletme varliklari icerisinde en yuksek paya sahip olan stoklarin Genel Kabul Gormus Muhasebe Ilkelerine, Muhasebenin Temel Kavramlarina, Uluslararasi ve Ulusal Muhasebe Standartlari ile vergi mevzuatina uygun olarak kayitlara alinip, alinmadiginin, degerleme olculerine uygun olarak degerlenerek finansal tablolarda durust bir bicimde raporlanip, raporlanmadiginin arastirilmasi stok hesaplarinin denetiminde temel amaci olusturmaktadir. Stoklarin dogru olarak raporlanabilmesi isletmede etkin bir belgeleme sisteminin ve ayrintili bir muhasebe kayit duzeninin kurulmasini gerektirmektedir. Bu da ancak isletmede uygun bir bicimde isletilen ic kontrol sisteminin varligina baglidir. Cunku isletmelerde etkin bir ic kontrol sisteminin varligi, guvenilir finansal raporlama yapilmasi, faaliyetlerin etkin ve verimli yurutulmesi, kanun ve duzenlemelere uygunluk anlamina gelmektedir. Bu nedenle stok hesaplarinda yer alan ve finansal tablolara yansitilan bilgilerle ilgili olarak isletme yonetiminin iddialarinin gercekten dogru olup, olmadiginin degisik denetim teknik ve yordamlari uygulanarak ortaya konulmasi ve stoklara iliskin tutarlarin finansal tablolarin durustlugunu gosterecek sekilde dogru bir bicimde raporlanarak bu tablolarda yer almasinin saglanmasi acisindan isletmede etkin bir ic kontrol sisteminin varligi ve ic denetim buyuk onem arz etmektedir.
author_names: Yunus Ceran

Muhammet Bezirci
title: STOK HESAPLARININ DENETIMINDE IC KONTROL SISTEMI VE IC DENETIMIN ONEMI
year: 2011

author_names: Muhammet Emin Yanik
title: RFI mitigation in low frequency all sky monitor (LOFASM) radio telescopes
year: 2017

author_names: Muhammet Mo Yanik
title: Die Anerkennung des Islam als Religionsgemeinschaft in Deutschland: Die Frage der nicht staatlichen Korperschaft des offentlichen Rechts, der aktuelle Status und die moglichen Konsequenzen fur islamische Gemeinden bei einer Erteilung
year: 2012

author_names: Muhammet Emin Yanik

Murat Torlak
title: Simplified 2D mmWave Near Field Imaging
year: 2019