Frequency-Domain Multi-User OFDMA Fast Fading Channel Simulation in High-Mobility Scenarios

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Publication: 
Frequency-Domain Multi-User OFDMA Fast Fading Channel Simulation in High-Mobility Scenarios
Publishing date: 
August, 2018
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prof. dr hab. inż.
Tomasz P.
Zieliński
Prof.
profesor zwyczajny
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D6/408
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+48 12 6174814
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tzielin@kt.agh.edu.pl
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wtorek 11:30- 12:30
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Tomasz P. Zieliński uzyskał stopień mgr inż. z elektroniki, dr habilitowanego z elektrotechniki i tytuł naukowy profesora z telekomunikacji odpowiednio w latach 1982, 1996 i 2003. Stopień doktora nauk technicznych otrzymał w 1989 roku w Instytucie Cybernetyki Technicznej i Robotów Bułgarskiej Akademii Nauk w Sofii. Od 1982 roku do 2006 roku pracował na AGH w Katedrze Metrologii, kolejno jako asystent (1982), adiunkt (1989) i profesor nadzwyczajny (2000). Od 2006 roku pracuje w Katedrze Telekomunikacji na stanowisku profesora zwyczajnego. Jest autorem lub współautorem ponad 150 prac naukowych (artykuły w czasopismach i referaty w materiałach konferencyjnych). Jest autorem trzech monografii: „Reprezentacje sygnałów niestacjonarnych typu czas-częstotliwość i czas-skala” (AGH, 1996), „Od teorii do cyfrowego przetwarzania sygnałów” (AGH, 2002, 2004) i „Cyfrowe przetwarzanie sygnałów: Od teorii do zastosowań” (WKŁ, 2005, 2007, 2009). Kierował ponad 10 polskimi projektami badawczymi oraz aktywnie uczestniczył w kilku programach międzynarodowych, m.in. „ECSON Engineering and Computational Science for Oncology Network” (Anglia), „VECTOR Versatile Endoscopic Capsule for gastrointestinal TumOr Recognition and therapy” (FP6 EC), „Efficacy of Laryngeal High-Speed Video-endoscopy” (NIH, USA). Jego zainteresowania naukowe obejmują zaawansowane zastosowania metod cyfrowego przetwarzania sygnałów w systemach telekomunikacyjnych i biomedycznych, w szczególności łączną czasowo-częstotliwościową analizę sygnałów. Jest członkiem IEEE.

Additional information: 

Tomasz P. Zielinski received the M.S. degree in electronics, the D.Sc. degree (habilitation) in electrical engineering and the the scientific Professor title in telecommunications from the AGH University of Science and Technology (AGH-UST), Kraków, Poland, in 1982, 1996 and 2003, respectively, and the Ph.D. degree in electrical engineering from the Institute of Engineering Cybernetics and Robotics of Bulgarian Academy of Sciences, Sofia, Bulgaria, in 1988. Since 1982 he has been working at the Department of Instrumentation & Measurement AGH-UST as a Research & Teaching Assistant (1982), Associate (1989), Assistant Professor (1996) and Associate Professor (2000). In 2006 he joined the Department of Telecommunications, AGH-UST as a Full Professor. He has authored and co-authored more than 150 scientific journal and conference papers. He is also the author of three monographs (all in Polish): Time-Frequency and Time-Scale Representations of Non-stationary Signals (1996), From Theory to Digital Signal Processing (2002, 2004) and Digital Signal Processing: From Theory to Applications (2005, 2007, 2009). He has been a supervisor of more than 10 Polish research projects and actively participated in a few international programs (EPSR Council UK, ECSON: Engineering and Computational Science for Oncology Network; VECTOR EC FP6: Versatile Endoscopic Capsule for gastrointestinal TumOr Recognition and therapy; NIH, USA: “Efficacy of Laryngeal High-Speed Video-endoscopy”). His research interests include advanced digital signal processing in telecommunication and biomedical systems, especially time-frequency signal analysis. He is an IEEE member.

Author/s: 
Cisek G., Zielinski T. P.
Publication type: 
proceedings paper
Publisher: 
15th Int. Symp. on Wireless Communication Systems ISWCS-2018, Lisbon
pages(from-to): 
1-6
Summary: 
Simulation of wideband wireless fading channels in frequency domain is more advantageous than time domain Finite Impulse Response (FIR) filtering approach for Multiple Input Multiple Output (MIMO) and multi-user scenarios, but is constrained with additional limitations. One of them is lack of capability to reproduce a smooth channel transition between incoherent states. In this paper, a novel algorithm is proposed for direct frequency-domain interpolation aiming at reconstruction of Intercarrier Interference (ICI) effects in multi-user Orthogonal Frequency Division Multiple Access (OFDMA) simulation. A software implementation on a real-time Digital Signal Processor (DSP) is considered during performance analysis. The method offers reduction in both storage and complexity comparing to the state of the art solution when maintaining similar accuracy. Linear and non-linear interpolations are considered. It is shown that accuracy of quadratic interpolation is close to theoretical bound for moderate-high Doppler frequencies when effect of ICI is limited to neighboring subcarriers.
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