Spectral signatures and interference of 802.11 Wi-Fi signals with Barker code spreading

This paper characterizes interference in 802.11 Wireless Fidelity (Wi-Fi) systems that utilize Barker codes as spreading sequences. Particularly, detailed spectral analyses are performed. These studies result in exact power spectral densities (PSDs) for 1 Mbps and 2 Mbps signaling schemes that define their spectral signatures. Investigation of the leakage of interference power into adjacent 802.11 channels, which can be useful for the deployment of cognitive radios, is presented The theoretical and computer simulation results for the Wi-Fi signal PSDs are verified through experimental measurements and emulation