Crosstalk in Communications: NEXT vs. FEXT Causes & Mitigation Strategies
Definition
Crosstalk is signal interference on a communication channel caused by another channel's signal.
Types
- Near-End Crosstalk (NEXT) – Interference at the transmitting end; caused by electromagnetic coupling between transmitting and receiving pairs. Depends on wire distance, signal frequency, cable type.
- Far-End Crosstalk (FEXT) – Interference at the receiving end; caused by signal reflections from the far end. Depends on cable length, frequency, cable type.
Mitigation
- Shielded cables
- Twisted pair cables
- Balanced lines
Reducing crosstalk is critical for data integrity in communication systems.
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