AirLive WT-2000PCI User Manual download pdf (Page 35)

AirLive WT-2000PCI User’s Manual

13. What is Spread Spectrum？

Spread Spectrum technology is a wideband radio frequency technique developed by the

military for use in reliable, secure, mission-critical communication systems. It 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 trade off

produces a signal that is, in effect, louder and thus easier to detect, provided that the receiver

knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned

to the right frequency, a spread –spectrum signal looks like background noise. There are two

main alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread

Spectrum (FHSS).

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AirLive WT-2000PCI User Manual Page 35