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Coverage of 802.11g WLANs in the presence of Bluetooth interference

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2 Author(s)
K. K. Wong ; Sch. of Electron. & Electr. Eng., Leeds Univ., UK ; T. O'Farrell

In this paper, the co-existence issue between IEEE 802.11g wireless-local-area networks (WLANs) and Bluetooth (BT) devices is examined and the use of symbol erasures to reduce the impact of this interference source is proposed. The minimum signal-to-interference ratio (SIR) required by an 802.11g WLAN to achieve a target PER of 0.01 with the number of erasures as a parameter is examined. From these SIR values, the coverage of the WLAN access point (AP) when the wireless station (STA) is being interfered by a BT device is studied. Simulation results show that at a high operational Eb/N0 = 30 dB, the WLAN's maximum coverage reduces by half as the data rate increases from 6 Mbps to 54 Mbps. The use of symbol erasures significantly enhances the coverage from 250% to 900% and from 40% to 300% when a BT device is 1 m and 10 m away from the STA, respectively. However, there is a threshold for the number of erasures beyond which further improvements in system performance are not obtained.

Published in:

Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on  (Volume:3 )

Date of Conference:

7-10 Sept. 2003