Carrier frequency effect on the MIMO eigenvalues in an indoor environment

Main Article Content

Alexis Paolo García Ariza
Gonzalo Llano
Lorenzo Rubio
Juan Reig

Abstract

The effect of the carrier frequency on the multiple-input multiple-output (MIMO) system eigenvalues is investigated experimentally in an indoor environment considering line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. The results show a reduction of the mean power gain in the MIMO system eigenvalues due to a correlation increment between the spatial subchannels when the carrier frequency increases. This effect causes a slightly reduction of the MIMO capacity.

Article Details

Section
Original Research
Author Biographies

Alexis Paolo García Ariza, Ilmenau Technische Universität

He was born in Bucaramanga, Colombia, in 1978. He received his M.S. degree in Electronic Engineering from the Industrial University of Santander (UIS), Bucaramanga, Colombia, in 2002. Now he is a Ph.D. student at the Universidad Politécnica de Valencia (UPV) since 2004, with the support of the European AlBan Programme. He was with RadioGIS research group at UIS between 2002 and 2004. He was also a Research Engineer at the iTEAM Research Institute at UPV between 2004 and 2008. He is currently a Re­search Assistant at the Electronic Measurement Research Lab, Ins­titute of Information Technology, Ilmenau University of Technolo­gy, Ilmenau, Germany.

His research is focused on mo­delling, simulation and mea­surement/sounding of wireless channels, with special interest in wideband MIMO channels, ultra-wideband (UWB) channels, and millimetre-wave (MM-Wave) channels. He also developed inves­tigations in propagation modeling applied to Andean conditions, and designing radio network planning tools based on Geographic Infor­mation Systems (GIS) for cellular and DVB-H/SH systems. He was a guest researcher at Mobile Com­munications Group, University of Agder, Grimstad, Norway, in 2007, where he developed inves­tigations in perfect modelling and simulation of MIMO channels using real-world measurement data.

Gonzalo Llano, Universidad Politécnica de Valencia

He received the M.S. degree in Technologies, Systems and Communications Networks from Technical University of Valencia (Spain) in 2007. He is currently a Ph.D. student and researcher at the Radio and Wireless Communications Group (RWCG) in the iTEAM Research Institute at the Technical Uni­versity of Valencia. His research is focused on modeling and sta­tistical characterization of UWB channels, adaptive modulation systems with multicarrier trans­mission for UWB (MB-OFDM UWB) and security in WPAN networks with UWB.

Lorenzo Rubio, Universidad Politécnica de Valencia

He received the Te­lecommunication Engineering and the Ph.D degrees from the Universidad Politécnica de Va­lencia (UPV), Spain, in 1996 and 2004 respectively. In 1996, he joined the Communications Department of the UPV, where he is now Associate Professor of wireless communications. He is a member of the Radio and Wireless Communications Group (RWCG) of the Telecommunications and Multimedia Applications Resear­ch Institute (iTEAM).

His main research interests are related to wireless communica­tions. Specific current research topics include radiowave propa­gation, measurement and mobile time-varying channels modelling in vehicular applications, ultra-wideband (UWB) communication systems, MIMO systems and equalization techniques in digital wireless systems.

Dr. Rubio was awarded by the Ericsson Mobile Communications Prize from the Spanish Telecom­munications Engineer Association for his study on urban statistical radiochannels characterisation applied to wireless communica­tions.

Juan Reig, Universidad Politécnica de Valencia

He was born in Alcoy, Spain, in 1969. He received the M.S. and Ph.D. degrees in Te­lecommunications Engineering from the Technical University of Valencia, Spain, in 1993 and 2000, respectively. He has been a faculty member in the Depar­tment of Communications at the Technical University of Valencia, Spain since 1994, where he is now Associate Professor of Telecom­munication Engineering. He is a member of the Radio and Wireless Communications Group (RWCG) of the Telecommunications and Multimedia Applications Resear­ch Institute (iTEAM). His areas of interest include fading theory, di­versity, ultra-wide band systems and vehicular communications in V2V and V2I networks.