WLAN Adjacent Channel Interference Suppression Using Cyclic Wiener Filter

The wireless access points of smartphones, tablets, and other devices face collisions and the channel throughput decrease in public places due to the limited numbers of channels. The channel spacing is required to reduce the effects of adjacent channel interference. This paper proposes an effective interfer-ence suppression method based on the cyclic Wiener filter. In the laboratory test setup, different channel spacing is simulated using a set of frequency shifts between the signal of interest and interference. The analytical and experimental comparisons of the stationary Wiener filter and cyclic Wiener filter for WLAN signals models are performed.