What is Spread Spectrum?
| Spread Spectrum Wideband |
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Most wireless LAN systems use SpreadSpectrum technology, a wideband radio frequency technique developed by the military for use in reliable, secure, mission-critical communications systems. SpreadSpectrum is designed to trade off bandwidth efficiency for reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband transmission, but the tradeoff produces a signal that is, in effect, louder and thus easier to detect, provided that the receiver knows the parameters of the SpreadSpectrum signal being broadcast. If a receiver is not tuned to the right frequency, a SpreadSpectrum signal looks like background noise. There are two types of spread spectrum radio: frequency hopping and direct sequence. |
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