Multi-element adaptive arrays for interference mitigation of multiple barker/CCK signals in 802.11b WLANs

We analyze interference in the unlicensed ISM wireless band for IEEE 802.11 barker-code spread and Complementary Code Keying spread Wireless Fidelity signals and contrast the results to that of narrowband interferers. Multi-element adaptive antennas with tapped-delay-lines are used to mitigate multiple interferers. It is shown that the number of delay line taps required to successfully mitigate the effect of multiple interferers increases as the number of interferers and array elements increases.