Interference in Ieee 802.11 Wlans: Characterization and Mitigation

This book characterizes various signals found in Wi-Fi networks. In particular, it analyzes Barker-spread signals, Complementary Code Keying signals, Orthogonal Frequency Division Multiplexed signals with Cyclic Prefix Code, and Microwave oven signals. Experimental and simulation results are utilized to refine and verify the theoretical models that use the specifications of the IEEE 802.11b/g standards throughout the book. The wireless interference resulting from intentional and unintentional sources is characterized and mitigated to provide better spectrum efficiency and dynamic resource allocation in WLANs. While Adaptive Antennas with Tapped Delay Lines are suggested to mitigate intentional interference from Wi-Fi sources, other mitigation methods are proposed to allow for WLAN operation in the presence of unintentional interferers like microwave ovens. The OFDM and cyclic prefix code analysis presented by this book relates to many applications beyond Wi-Fi networks. For example, it applies to WiMAX and DSL networks, digital television, and audio broadcasting. This book is particularity useful to researchers, R&D companies, RF engineers, and telecommunications professionals.