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WIRELESS TRANSMISSION SYSTEM [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2021-10-28

English

Subject field(s)
  • Compartment - Royal Canadian Mounted Police (RCMP)
DEF

Any transmission, emission or reception of a sign, signal, writing, image, sound or intelligence of any nature by means of wireless medium, e. g. radio, visual or other electromagnetic system.

French

Domaine(s)
  • Tiroir - Gendarmerie royale du Canada (GRC)
DEF

Toute transmission, émission ou réception d'un signe, d'un signal, d'une inscription, d'une image, d'un son ou d'un renseignement de quelque nature que ce soit, par un moyen sans fil, p. ex. par radio, moyen visuel ou tout autre moyen électromagnétique.

Spanish

Save record 1

Record 2 2009-08-28

English

Subject field(s)
  • Optical Telecommunications
DEF

A technology that uses light propagating in free space to transmit data between two points.

CONT

Free-Space Optics(also known as FSO, Wireless Optics or Optical Wireless) is an optical data, voice and video transmission system. Like fiber optic cable, wireless optics communication systems use laser light to transmit a digital signal between two transceivers. However, unlike fiber, the laser like is transtmited through the air(free-space) instead of through a glass strand. In order for the digital signal to be transmitted and received, there must be clear line of site between each wireless optics unit. In other words, there should be no obstructions such as trees or buildings between the transceiver units.

CONT

The technology is useful where the physical connection of the transmit and receive locations is difficult, for example in cities where the laying of fibre optic cables is expensive. Free Space Optics is also used to communicate between space-craft, since outside of the atmosphere there is little to distort the signal. The optical links usually use infrared laser light, although low-data-rate communication over short distances is possible using LEDs [Light Emitting Diode]. IrDA [Infrared Data Association] is a very simple form of free-space optical communications. Distances up to the order of 10 km are possible, but the distance and data rate of connection is highly dependent on atmospheric conditions.

OBS

In Information Technology and Communications, IrDA refers to Infrared Data Association, a standard for communication between devices (such as computers, PDAs and mobile phones) over short distances using infrared signals.

Key term(s)
  • free space photonics

French

Domaine(s)
  • Télécommunications optiques
CONT

L'optique sans fil et la radio sont deux technologies foncièrement différentes qui ont longtemps été considérées comme concurrentes. [...] Avec l'optique sans fil, on obtient de très hauts débits garantis jusqu'à 10 Gb [gigabits] se propageant sur de courtes ou de moyennes distances (entre 100 m et 2 km), en «full duplex».

Spanish

Save record 2

Record 3 2008-05-23

English

Subject field(s)
  • System Names
  • Telecommunications Transmission
DEF

Wireless microwave transmission system for point-to-multipoint transmission. Operates in the 27. 5 to 28. 35 GHz range and 29. 2 to 29. 325 GHz range.

OBS

Much like MMDS, but using a different frequency band and carrying up to 49 channels. The receiving antenna is much smaller: a dish six inches across that can fit on a window sill. The signal is less prone to obstruction than MMDS because it is frequency-modulated, like FM radio. But like MMDS, the transmission range is short. Source: NYT_950418

OBS

Local Multipoint Distribution System; LMDS; Local Multichannel Distribution System: Source: France Telecom.

French

Domaine(s)
  • Noms de systèmes
  • Transmission (Télécommunications)
OBS

Source : France Telecom

Spanish

Campo(s) temático(s)
  • Nombres de sistemas
  • Transmisión (Telecomunicaciones)
Save record 3

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