Bluetooth interference cancellation for 802.11g WLAN receivers

It is well known that one of the main sources of interference in the 2.4 GHz unlicensed band is due to the presence of Bluetooth systems in this bands. Recently, the IEEE 802.11 committee adopted a draft standard called 802.11g that will provide data rates of up to 54 Mbps in the 2.4 GHz band using OFDM as the physical layer (PHY) modulation format. One of the main barriers to actually achieving the high data rates will be the presence of interferers like Bluetooth. In this paper we develop a PHY layer algorithm for simultaneously estimating the multipath channel and interference characteristics and using these estimates in the convolutional decoder in order to improve the system performance in the presence of Bluetooth interference. Simulation results indicate that substantial improvements in 802.11g performances can be obtained by this approach.