Differences between version 7 and predecessor to the previous major change of FHSS.
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| Newer page: | version 7 | Last edited on Saturday, July 23, 2005 12:29:48 pm | by DanielLawson | Revert |
| Older page: | version 5 | Last edited on Saturday, July 23, 2005 12:19:03 pm | by CraigBox | Revert |
@@ -1,12 +1,15 @@
-[FHSS] is an [Acronym] for ''Frequency-Hopping Spread Spectrum''
.
+[FHSS] is an [Acronym] for __F__requency __H__opping __S__pread __S__pectrum
.
-FHSS is a spread-spectrum
method of transmitting signals, by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. A spread-spectrum transmission offers three main advantages over a fixed-frequency transmission:
+FHSS is a SpreadSpectrum
method of transmitting signals, by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver.
-# 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 Frequency-Hop spread-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
.
-# Spread-spectrum transmissions can share a frequency band
with many types of conventional transmissions with minimal interference
. The spread-spectrum signals add minimal noise to the narrow-frequency communications
, and vice versa
. As a result
, bandwidth can be utilized more efficiently
.
+FHSS
was used in
the original [802
.11] standard, but was replaced
with [DSSS]
. It is also used in other common wireless technologies such as BlueTooth
, 2
.4GHz DECT cordless telephones
, and HomeRF
.
-FHSS was used in the original [802.11] standard, but was replaced with
[DSSS].
+Compare
[DSSS]
+! References
* [FHSS at Wikipedia|http://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum]
* [FHSS at wireless-nets.org |http://www.wireless-nets.com/articles/whitepaper_spread.htm ]
+
+----
+
+Part of CategoryNetworking, CategoryWireless
