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Throughput sensitivity to antenna pattern and orientation in 802.11n networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationIEEE 22nd International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), 2011
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages809 - 813
Number of pages5
ISBN (Print)9781457713460, 9781457713477
DatePublished - Sep 2011


In this paper the throughput and packet error rate for an in-home 802.11n network is theoretically derived for two different types of 3x3 antenna configurations. Our first configuration assumes the use of three low directivity omni-dectional elements. The second arrangement makes use of three orthogonally orientated directional elements. The spatial and temporal characteristics of the in-home channels are modelled using 3D ray tracing and combined with appropriately orientated complex polarmetric patterns for each antenna element. Physical layer throughput is computed for all modulation and coding schemes using a received bit information rate abstraction technique. The theory shows that directional antennas outperform the omni-directional devices in most cases. Directional elements show increased sensitivity to orientation, however for 83% of locations and orientations they still result in throughput enhancement. Directional antennas provide a 33% improvement in average data rate for random client orientations, improving to 52% with optimum alignment to the multipath.

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Terms of use: Copyright © 2011 IEEE. Reprinted with permission, from Di Kong, Evangelos Mellios, David Halls, Andrew Nix and Geoffrey Hilton; 'Throughput sensitivity to antenna pattern and orientation in 802.11n networks'; IEEE PIMRC September 2011. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • MIMO, 802.11n, spatial multiplexing, directional antennas, Eigen-beamforming

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