Adaptive subcarrier selection for mitigating Bluetooth interference in OFDM-based wireless LANs operating at 2.4 GHz

Srikant K. Chari

doi:10.1117/12.487083

23 July 2003 Adaptive subcarrier selection for mitigating Bluetooth interference in OFDM-based wireless LANS operating at 2.4 ghz

Srikant K. Chari

Author Affiliations +

Proceedings Volume 5100, Digital Wireless Communications V; (2003) https://doi.org/10.1117/12.487083
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

IEEE 802.11g WLANs operating at 2.4 GHz face interference from Bluetooth which also uses the same frequency. IEEE 802.11g is an orthogonal frequency divison multiplexing (OFDM) based WLAN standard. Adaptive subcarrier selection (ASuS) involves using feedback from the receiver to dynamically allocate subcarriers for OFDM transmission. This paper proposes a method to avoid Bluetooth interference using ASuS. By adaptively choosing subcarriers for OFDM transmission, the frequencies used by Bluetooth can be avoided. Power level deviations in small groups of contiguous subcarriers with respect to other subcarriers in an OFDM symbol can be used as an indication of Bluetooth interference. Simulations show that as compared to the conventional OFDM technique, adaptive subcarrier selection results in significant reduction in the packet error rate.

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Srikant K. Chari "Adaptive subcarrier selection for mitigating Bluetooth interference in OFDM-based wireless LANS operating at 2.4 ghz", Proc. SPIE 5100, Digital Wireless Communications V, (23 July 2003); https://doi.org/10.1117/12.487083

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