According to described in [1] and other similar researches approach, the interference factor (IF) between two IEEE 802.11n devices (Wi-Fi routers) can be obtained via OFDM spectral masks overlapping consideration. In this case, the maximum IF will be when devices share the same channel (CCI - co-channel interference).
However, classical recommendation in Wi-Fi planning is to use several non-overlapping channels (e.g. 1, 6, 11) and therefore to avoid ACI (adjacent channel interference). Additionally, we know that CCI is not kind of "pure" electromagnetic interference, there are specialized mechanisms like NAV (Network Allocation Vector) and CW (Contention Window) that influence resource sharing.
Moreover, I did several measurements with two 802.11n routers which were communicating with their stations and CCI case showed better results than ACI with one channel difference (see the attachment).
I'll be appreciated, if anybody knows and can share some relevant research about CCI IFs!
References:
1. Mi, P. and Wang, X., 2012, June. Improved channel assignment for WLANs by exploiting partially overlapped channels with novel CIR-based user number estimation. In 2012 IEEE International Conference on Communications (ICC) (pp. 6591-6595). IEEE.
Nice approach to bring into notice about co channel interfrece dominant nature on other class of interference. But, I think your repeated observation within same wife network with different mobile phone models will further improve your result .
hi,
Adjacent channel interference (ACI) occurs when transmissions are sent on an adjacent or partially overlapping channel. The channel bleeds over on an overlapping channel, which adds noise and interference. As a result, ACI is worse than CCI.The common types of interference include adjacent channel Interference (ACI), co-channel Interference (CCI), Electromagnetic Interference(EMI), ICI (Inter Carrier Interference), ISI (Inter Symbol Interference), light Interference, Sound Interference etc.
for more info:
https://support.accessagility.com/hc/adjacent-channel-interference-and-the-real-evil-behind-it
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