What does Co-channel interference (CCI) refer to?

Co-channel interference (CCI) refers to the phenomenon that occurs when multiple devices send signals simultaneously over the same frequency channel. This interference can lead to degraded performance, as the signals can disrupt one another, making it difficult for devices to communicate effectively. In wireless communication, only one device can transmit data at a time on a given channel to prevent overlapping signals from colliding, which is critical for maintaining clarity and reliability in data transmission.

The concept of CCI is particularly important in environments where many devices are competing for the same frequency bandwidth. Understanding CCI helps technicians design and implement networks that minimize interference and optimize communication. While leveraging multiple channels can alleviate some of the issues related to CCI, the fundamental aspect of managing communication on a shared frequency involves ensuring that devices do not transmit simultaneously, which is encapsulated in the idea that only one device can talk at a time on that channel.