Reducing Bluetooth Interference with Diversity Techniques in IEEE 802.11b Networks

This master thesis addresses the problem with Bluetooth interference on IEEE 802.11b networks. The maximum ratio combining and the interference rejection combining algorithm's, two methods for reducing this interference have been evaluated. The methods are evaluated with a simulated receiver using two antennas, and then compared with an ordinary receiver using one antenna. The results are presented in terms of bit error rate and throughput. The simulation results show that adding spatial diversity yields a signif-icant reduction in bit error rate. The di®erence between MRC and IRC is rather small, to the IRC algorithm's advantage. As a consequence of the reduction in bit error rate the throughput is increased, especially for large fragment sizes. Furthermore, performance of the IRC algorithm has been investigated. The results reveal that the algorithm is not critically depending on whether the Bluetooth interference is active during the WLAN preamble transmission or not. Acknowledgements This master thesis was conducted at the signal processing group at th