Editing Spread spectrum (section)

{{Short description|Spreading the frequency domain of a signal}}
{{Use American English|date = December 2019}}
{{Modulation techniques}}
{{Multiplex techniques}}

In [[telecommunications]], especially [[radio communication]], '''spread spectrum''' are techniques by which a [[signal (electrical engineering)|signal]]  (e.g., an electrical, electromagnetic, or acoustic) generated with a particular [[Bandwidth (signal processing)|bandwidth]] is deliberately spread in the [[frequency domain]] over a wider [[frequency band]]. Spread-spectrum techniques are used for the establishment of secure communications, increasing resistance to natural [[Interference (communication)|interference]], [[Noise (electronics)|noise]], and [[radio jamming|jamming]], to prevent detection, to limit [[Spectral flux density|power flux density]] (e.g., in [[satellite]] [[downlink]]s), and to enable multiple-access communications.