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WLAN/WDS performance using directive antennas in highly mobile scenarios: experimental results

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

Original languageEnglish
Title of host publicationInternational Wireless Communications and Mobile Computing Conference, 2008 (IWCMC '08)
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages700 - 705
Number of pages5
ISBN (Print)9781424422012
StatePublished - Aug 2008
Event4th International Wireless Communications and Mobile Computing Conference (IWCMC) - Crete, Greece


Conference4th International Wireless Communications and Mobile Computing Conference (IWCMC)
Period1/08/08 → …


This paper presents experimental results from a series of IEEE 802.11g studies to investigate the performance of vehicular to roadside wireless communications. In particular, two high-gain omni-directional antennas were used at the roadside access point, while high-gain omni-directional and directional antennas were compared for use on the vehicle. By employing high-gain antennas at both ends of the wireless link, the range of the WLAN network was dramatically improved. Moreover, the use of directional antennas in highly mobile applications allows communication at higher vehicle speeds (by reducing the Doppler spread) and longer ranges (by reducing delay spread and increasing the received power level). Results show that mobile performance is significantly improved, especially when directional antennas are utilised at the receiving end of the link. As a result, the amount of data that can be exchanged between a moving vehicle and a roadside access point is considerably increased. The use of WDS (wireless distribution system) is also investigated in this paper. The reported measurements form part of a larger campaign to compare WiFi, WiMAX and HSPA technologies for vehicular communications

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Sponsorship: This work was partly funded by the Technology Strategy Board (TSB), UK via the VISUALISE project Terms of use: Copyright © 2008 IEEE. Reprinted from IEEE International Wireless Communications and Mobile Computing Conference, 2008 (IWCMC '08). 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

  • WiFi, directional antennas, vehicular communications, doppler pPower spectrum


4th International Wireless Communications and Mobile Computing Conference (IWCMC)

Duration1 Aug 2008 → …

Event: Conference

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