Prediction of variation in MIMO channel capacity for the populated indoor environment using a radar cross-section-based pedestrian model

Ziri-Castro, Karla I. and Scanlon, William G. and Evans, Noel E. (2005) Prediction of variation in MIMO channel capacity for the populated indoor environment using a radar cross-section-based pedestrian model. IEEE Transactions on Wireless Communications, 4 (3). pp. 1186-1194. ISSN 1536-1276

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Abstract

[Abstract]: Multipath propagation is a fundamental requirement for the operation of multiple-input multiple-output (MIMO) wireless systems. However, at ultrahigh frequency (UHF) and above, pedestrian movement may significantly affect the multipath propagation conditions in indoor environments. For the first time, a systematic analysis of the effect of pedestrian movement on channel capacity for an otherwise line-of-sight MIMO link in a single room is presented. A novel channel model for the populated indoor environment is also introduced, based on geometrical optics and a detailed radar cross-section representation of the human body. The new model generates a temporal profile for the complex transfer function of each antenna combination in the MIMO system in the presence of specified pedestrian movement. Channel capacity values derived from this data are important in terms of understanding the limitations and possibilities for MIMO systems. Capacity results are presented for a 42-m2 single room environment, using a 2.45-GHz narrowband 8 8 MIMO array with 0.4 element spacing. Although the model predicts significant increases in the peak channel capacity due to pedestrian movement, the improvement in mean capacity values was more modest. For the static empty room case, the channel capacity was 10.9 b/s/Hz, while the mean capacity under dynamic conditions was 12.3 b/s/Hz for four pedestrians, each moving at the same speed (0.5 m/s). The results presented suggest that practical MIMO systems must be sufficiently adaptive if they are to benefit from the capacity enhancement caused by pedestrian movement.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Copyright 2005 IEEE. Personal use of this material is permitted. This material is posted here with permission of the IEEE. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 11 Oct 2007 01:18
Last Modified: 02 Jul 2013 22:48
Uncontrolled Keywords: antenna arrays; channel capacity; diversity methods; fading, finite difference time domain (FDTD); modeling; multipath channels; multiple-input multiple-output (MIMO); radar cross section (RCS); radio propagation; ray tracing; simulation
Fields of Research (FOR2008): 10 Technology > 1005 Communications Technologies > 100501 Antennas and Propagation
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
URI: http://eprints.usq.edu.au/id/eprint/3002

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