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FREQUENCY SPREADING [4 records]

Record 1 2011-03-24

English

Subject field(s)
  • Telecommunications Transmission
  • Radio Waves
DEF

A technology that can provide short-range, high-speed wireless data transmissions by spreading signals over a broad swath of the frequency spectrum instead of a single fixed frequency.

OBS

UWB has a wide variety of potential uses, from personal radar systems for detecting collisions to imaging devices that can see through walls.

French

Domaine(s)
  • Transmission (Télécommunications)
  • Ondes radioélectriques
DEF

Technologie qui consiste à envoyer des impulsions radioélectriques minutées avec une grande précision sur un spectre très étendu.

OBS

La technologie UWB peut servir à une foule d'applications, allant de la transmission de la voix et des données (par exemple, sans fil) aux systèmes radar de haute performance (par exemple, détection à travers les murs et imagerie).

Spanish

Campo(s) temático(s)
  • Transmisión (Telecomunicaciones)
  • Ondas radioeléctricas
CONT

La tecnología de banda ultraancha, típicamente caracterizada por una radiación de muy baja potencia en una banda de radiofrecuencia muy ancha, podría facilitar toda una serie de aplicaciones de comunicación, medición, localización, medicina, vigilancia e imágenes beneficiosas para diversas políticas comunitarias, incluidas las de la sociedad de la información y mercado interior. Dadas estas circunstancias, es importante establecer unas condiciones reguladoras que favorezcan el desarrollo de mercados económicamente viables para las aplicaciones de tecnología de banda ultraancha a medida que vayan surgiendo oportunidades comerciales.

CONT

[...] la banda ultra ancha utiliza una energía muy baja, ofrece una banda mucho más ancha y permite reutilizar frecuencias asignadas con otros usuarios sin muchas interferencias; también tiene sus desventajas, sólo opera en rangos de hasta 10 metros y los dispositivos tienen que ser monitorizados de cerca para asegurarse de que no utilizan mucha energía [...]

Save record 1

Record 2 - external organization data 2009-07-30

English

Subject field(s)
  • Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies)
06.01.37 (19762)
ISO/IEC standard entry number
DEF

frequency at which the spreading sequence modulates the carrier

OBS

chip rate: term and definition standardized by ISO/IEC [ISO/IEC 19762-4:2008].

French

Spanish

Save record 2

Record 3 2007-01-30

English

Subject field(s)
  • Foundry Practice
DEF

[A large tall] stack ... designed to discharge exhaust gases [and smoke] from the various smelting furnaces at [a] smelter.

CONT

However, some episodes of elevated sulphur dioxide still occur, with emissions from the smelter's stack spreading over the community. This happens during weather conditions called surface inversions that force the plume from the smelter stack down to the ground instead of allowing the emissions to disperse. Fugitive spill gases can also have an impact on downtown air quality, although the frequency of these events is decreasing.

French

Domaine(s)
  • Fonderie
CONT

Cette société, spécialisée dans le recyclage de métaux précieux, manipule des produits hautement toxiques, rejette régulièrement des fumées épaisses et irritantes, et cause d'importantes nuisances sonores dans une zone d'habitation à forte densité. [...] Des études sur les fumées rejetées par la cheminée de fonderie restent, en tout état de cause, nécessaires.

CONT

Les modes de dispersion régionale de six métaux (As, Cd, Cu, Hg, Pb, Zn), émis par la cheminée de la fonderie de métaux de base à Flin Flon, ont été étudiés dans les sols de surface et à plus grande profondeur [...]

Spanish

Save record 3

Record 4 2003-07-21

English

Subject field(s)
  • Satellite Telecommunications
CONT

Bandwidth Spreading : Signal Spreading works quite well in situations with strong narrow band interference signals since the SS signal has a unique form of frequency diversity. The actual signal spreading may be achieved with one of three basic techniques. These include direct sequence, frequency hopped and pulsed FM or hybrid forms.

French

Domaine(s)
  • Télécommunications par satellite

Spanish

Save record 4

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