kanalstøy

Kanalstøy refers to unwanted electrical noise that appears on a communication channel. This noise can originate from various sources and can interfere with the transmission of signals, potentially leading to data corruption or loss of information. In telecommunications, a channel is the medium through which signals are sent, such as a wire, optical fiber, or radio wave.

Sources of kanalstøy are diverse. They can include external factors like electromagnetic interference from other electronic devices or natural phenomena such as lightning. Internally, components within the transmission system itself can also introduce noise due to thermal agitation of electrons or imperfections in the materials used. This internal noise is often referred to as thermal noise or Johnson-Nyquist noise.

The presence of kanalstøy can degrade the signal-to-noise ratio (SNR), which is a measure of the strength of the desired signal relative to the background noise. A lower SNR makes it more difficult for the receiver to accurately interpret the transmitted signal. Techniques such as filtering, error correction coding, and signal amplification are employed to mitigate the effects of kanalstøy and ensure reliable communication. Understanding and managing kanalstøy is crucial for designing and maintaining effective communication systems.