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|Older page:||version 5||Last edited on Saturday, July 23, 2005 12:19:03 pm||by CraigBox||Revert|
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[FHSS] is an
[Acronym] for ''Frequency-Hopping Spread Spectrum''
+ [Acronym] for .
a spread-spectrum method of transmitting signals
, by rapidly switching a carrier among many frequency channels
, using a pseudorandom sequence known to both transmitter
. A spread-spectrum transmission offers three main advantages over a fixed-frequency transmission:
+ FHSS is , , and .
# Spread-spectrum signals are highly resistant to noise and interference. The process of re-collecting a spread signal spreads out noise and interference, causing them to recede into the background.
# Spread-spectrum signals are difficult to intercept. A
spectrum signal sounds like a momentary noise burst or simply an increase in the background noise for short Frequency
- Hop codes on any narrowband receiver except a Frequency-Hop spread-spectrum receiver using the exact same channel sequence as was used by the transmitter
- spectrum transmissions can share a frequency band with many types of conventional transmissions with minimal interference
spread -spectrum signals add minimal noise to the narrow-frequency communications, and vice versa. As a result, bandwidth can be utilized more efficiently
+ Frequency- spread spectrum
+ - . - . spread.
FHSS was used in the original [802.11] standard, but was replaced with [DSSS].
* [FHSS at Wikipedia|http://en.wikipedia.org/wiki/Frequency
* [FHSS at wireless
- nets.org |http://www.wireless
- nets.com/articles/whitepaper_spread.htm ]