Performance Evaluation of Beamspace MIMO Systems with Channel Estimation in Realistic Environments

Authors

  • Konstantinos Maliatsos Department of Digital Systems, University of Piraeus, Greece
  • Panagiotis N. Vasileiou Department of Digital Systems, University of Piraeus, Greece
  • Athanasios G. Kanatas Department of Digital Systems, University of Piraeus, Greece

DOI:

https://doi.org/10.13052/jcsm2245-1439.234

Keywords:

beamspace, MIMO, BS-MIMO, channel estimation, ESPAR, link level evaluation

Abstract

Beamspace MIMO (BS-MIMO) systems have been recently proposed as a means to address the two key weaknesses of conventional MIMO systems: the antenna size and the need for multiple RF chains. BS-MIMO transmission is supported by the Electronically Steerable Passive Array Radiators (ESPAR) with a single active and multiple parasitic elements. The main objective is to develop efficient MIMO multiplexing schemes that use only one Radio Frequency (RF) chain and simultaneously maintain extremely small antenna size. Moreover, the recent research results have shown that BS-MIMO systems have increased multiplexing and beamforming capabilities and for small antenna sizes clearly outperform equivalent conventional systems in terms of system capacity. Nevertheless, research on BS-MIMO has been focusing on the study of the ESPAR antenna properties that facilitate beamspace transmission and the theoretical analysis of the ergodic capacity provided by the aerial degrees of freedom (aDoF) of the beamspace channel. Recently, the first steps have been made to design and evaluate practical BS-MIMO systems. This paper presents extended results of the first attempt to design practical and realistic BS-MIMO transmission and reception schemes and it specifically focuses on channel estimation techniques for BS-MIMO systems with adaptive pattern reconfiguration. Adaptation of the basic least-squares (LS) and minimum mean squared error (MMSE) estimators for the beamspace radio channels is performed and the algorithms are incorporated in an adaptive Singular Value Decomposition (SVD)-based system. Finally, fundamental results extracted by the developed beamspace link level simulator are presented in order to evaluate and compare BS-MIMO with equivalent conventional MIMO systems.

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Author Biographies

Konstantinos Maliatsos, Department of Digital Systems, University of Piraeus, Greece

Konstantinos Maliatsos received his Diploma in Electrical and Computer Engineering from the National Technical University of Athens, Greece (NTUA) in 2003. He joined the NTUA Mobile Radio-Communications Laboratory (MRCL) working as an assistant researcher in various industry and research oriented projects. In 2005 he earned his Master’s degree in Business Administration from the postgraduate studies program “Techno-Economic Systems” organized by NTUA, National Kapodistrian University of Athens and University of Piraeus (UniPi), while he started working on his PhD entitled “Transmission techniques, Design and Analysis of Software Defined Radio – Cognitive Radio Adaptive wireless transceivers”. He received his PhD degree in 2011. As an assistant researcher he worked for 3 years on projects for the Greek General Secretariat for Research and Technology on Cognitive Radios and also participated in MRCL European projects. Currently he is working on his post-doctoral research on advanced MIMO techniques in the Department of Digital Systems of UniPi. He also continuous to cooperate with MRCL as a researcher for FP7 European projects. He has published more than 25 papers in International Journals and Conference proceedings. His research interests include Software Radio, Cognitive Radio and Dynamic Spectrum Access, Multicarrier Modulations, MIMO systems (conventional, beamspace, massive and distributed), Filter Bank theory, Synchronization for broadband wireless, Channel Modeling, Detection and Estimation theory.

 

Panagiotis N. Vasileiou, Department of Digital Systems, University of Piraeus, Greece

Panagiotis N. Vasileiou received his M.Sc. Degree in 2012 in digital communications and networks with honors and the B.Sc. Degree in 2010, from the Department of Digital Systems in the University of Piraeus. He has been awarded with scholarships for the first place in the academic records in three several periods during the B.Sc. program and one scholarship during the M.Sc. Since November 2013, he is a Phd student at the Telecommunication System Laboratory, Department of Digital Systems, University of Piraeus, where he involved in various research projects with published work in various communities.

Athanasios G. Kanatas, Department of Digital Systems, University of Piraeus, Greece

Athanasios G. Kanatas received the Diploma in Electrical Engineering from the National Technical University of Athens (NTUA), Greece, in 1991, the M.Sc. degree in Satellite Communication Engineering from the University of Surrey, Surrey, UK in 1992, and the Ph.D. degree in Mobile Satellite Communications from NTUA, in February 1997. From 1993 to 1994 he was with National Documentation Center of National Research Institute. In 1995 he joined SPACETEC Ltd. In 1996 he joined the Mobile Radio-Communications Laboratory as a research associate. From 1999 to 2002 he was with the Institute of Communication & Computer Systems. In 2000 he became a member of the Board of Directors of OTESAT S.A. In 2002 he joined the University of Piraeus where he is a Professor in the Department of Digital Systems. From 2008 to 2009 he has served as Member of the Senate of University of Piraeus. From 2007 to 2009 he served as Greek Delegate to the Mirror Group of the Integral Satcom Initiative. His current research interests include the development of new digital techniques for wireless and satellite communications systems, channel characterization, simulation, and modeling for future mobile, mobile satellite and wireless communication systems, antenna selection and RF preprocessing techniques, new transmission schemes for MIMO systems, and energy efficient techniques for Wireless Sensor Networks. He has published more than 120 papers in international Journals and conference proceedings. He has been a Senior Member of IEEE since 2002. From 1999 to 2009 he chaired the IEEE ComSoc Chapter of the Greek Section. This year he elected Dean of the School of Information & Communication Technologies of the University of Piraeus.

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Published

2014-07-20

How to Cite

1.
Maliatsos K, Vasileiou PN, Kanatas AG. Performance Evaluation of Beamspace MIMO Systems with Channel Estimation in Realistic Environments. JCSANDM [Internet]. 2014 Jul. 20 [cited 2024 Nov. 24];2(3-4):265-90. Available from: https://journals.riverpublishers.com/index.php/JCSANDM/article/view/6153

Issue

2014: Vol 2 Iss 3-4

Section

Articles