Differences between current version and predecessor to the previous major change of FHSS.
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| Newer page: | version 8 | Last edited on Saturday, July 23, 2005 1:51:12 pm | by AristotlePagaltzis | |
| Older page: | version 5 | Last edited on Saturday, July 23, 2005 12:19:03 pm | by CraigBox | Revert |
@@ -1,12 +1,11 @@
-[FHSS] is an
[Acronym] for ''Frequency-Hopping Spread Spectrum''
.
+An
[Acronym] for __F__requency __H__opping __S__pread __S__pectrum, 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
.
-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] 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
.
-# 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
.
+! See also:
+* [DSSS]
+* WikiPedia:
Frequency-hopping_
spread_
spectrum
+* [FHSS at wireless
-nets
.org |http://www.wireless
-nets
.com/articles/whitepaper_
spread.htm ]
-FHSS was used in the original [802.11] standard, but was replaced with [DSSS].
-
-* [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
