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In communications and electronics, especially in telecommunications, interference is anything which alters, modifies, or disrupts a signal as it travels along a channel between a source and a receiver. The term typically refers to the addition of unwanted signals to a useful signal. Common examples are:
- Electromagnetic interference (EMI)
- Co-channel interference (CCI), also known as crosstalk
- Adjacent-channel interference (ACI)
- Intersymbol interference (ISI)
- Inter-carrier interference (ICI), caused by doppler shift in OFDM modulation (multitone modulation).
- Common-mode interference (CMI)
- Conducted interference
Radio resource management aims at reducing and controlling the co-channel and adjacent-channel interference.