Back طيف الانتشار Arabic Метод за разширяване на спектъра Bulgarian Espectre eixamplat Catalan Rozprostřené spektrum Czech Frequenzspreizung German Διασπορά φάσματος Greek Espectro ensanchado Spanish مخابرات طیف گسترده Persian Hajaspektri Finnish Étalement de spectre French
| Passband modulation |
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| Analog modulation |
| Digital modulation |
| Hierarchical modulation |
| Spread spectrum |
| See also |
| Multiplexing |
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| Analog modulation |
| Related topics |
In telecommunications, especially radio communication, spread spectrum are techniques by which a signal (e.g., an electrical, electromagnetic, or acoustic) generated with a particular 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, noise, and jamming, to prevent detection, to limit power flux density (e.g., in satellite downlinks), and to enable multiple-access communications.