TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

QUADRATURE SIGNAL [8 records]

Record 1 2024-02-22

English

Subject field(s)
  • Internet and Telematics

French

Domaine(s)
  • Internet et télématique
CONT

Le courant des données binaires à l'entrée du codeur est à la cadence nominale de 1/T 90 Mb/s. Il est subdivisé en deux courants a et b chacun à la cadence 1/2T. Ces courants sont codés en différentiel afin d'éliminer les effets de propagation d'erreur, ils sont ensuite modulés en amplitude sur porteuses en quadrature, sommés et passés dans un filtre de codage duobinaire. (Voir D.P. Taylor et D.C. CHEUNG IEEE Trans. On Communications COM 27 No 2 (février 1979 p. 461-468.)

Spanish

Save record 1

Record 2 2024-02-22

English

Subject field(s)
  • Telecommunications Transmission
  • Internet and Telematics

French

Domaine(s)
  • Transmission (Télécommunications)
  • Internet et télématique

Spanish

Save record 2

Record 3 2013-05-17

English

Subject field(s)
  • Measurements of Electricity
CONT

We investigate radio-frequency(rf) reflectometry in a tunable carbon nanotube double quantum dot coupled to a resonant circuit. By measuring the in-phase and quadrature components of the reflected rf signal, we are able to determine the complex admittance of the double quantum dot as a function of the energies of the single-electron states.

French

Domaine(s)
  • Mesures de grandeurs électriques

Spanish

Save record 3

Record 4 2007-04-17

English

Subject field(s)
  • Telecommunications Transmission
DEF

A form of quadrature phase shift keying where the quadrature component of the signal is offset from the in-phase component by half a symbol period.

OBS

As a result the amplitude does not cross zero, and this reduces the peak to average ratio. This has advantages for power amplifiers because it reduces the peak to average ratio and as a result it is used in the reverse link for CDMA [code division multiple access] transmissions.

Key term(s)
  • off-set quadrature phase shift keying

French

Domaine(s)
  • Transmission (Télécommunications)

Spanish

Save record 4

Record 5 2006-09-20

English

Subject field(s)
  • Remote Sensing
CONT

A "RAW Signal Data" product contains raw or unprocessed radar video baseband data in complex in-phase and quadrature signal(I and Q) format as they are recorded by the spacecraft. The only processing performed to the downlink X-band "raw signal data" is the frame synchronization, meaning re-assembly of the data into contiguous radar range lines in matrix form, and the CEOS [Committee on Earth Observations Satellite] formatting. Each range line of data is represented by one Signal Data Record in the RAW CEOS product.

OBS

The RAW product can contain any single beam mode, or for ScanSAR any combination of different beam modes, depending on the operation of the SAR instrument during the data reception or recording period. A RAW product cannot, however, combine data from more than one beam mode, i.e. data from two different beam modes are always packaged as two separate products. A RAW product must be SAR processed before it can be displayed as imagery. RAW products are typically produced on 8 mm (Exabyte) tapes. This is the standard medium for exchanging data between network stations.

OBS

Raw data products are available for all RADARSAT beam modes.

OBS

"raw signal data" product: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
OBS

Les produits RADARSAT sont disponibles en format archive ou informatisé (différents niveaux de traitement). Caractéristiques du produit : signal radar brut avec données auxiliaires; traitements visés et synthèse d'images, interférométrie.

OBS

produit «raw signal data» : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 5

Record 6 1989-11-03

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 6

Record 7 1989-06-30

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 7

Record 8 1979-12-12

English

Subject field(s)
  • Telecommunications
  • Telecommunications Transmission
OBS

In particular, a quaternary partial response system(QPRS) is obtained by two 3-level class 1 partial response signals modulating two carriers in quadrature and gives rise to 9 signal points in the phase-amplitude space.

French

Domaine(s)
  • Télécommunications
  • Transmission (Télécommunications)
OBS

En particulier, pour établir un système quadrivalent à réponse partielle (SRPQ), on fait moduler deux porteuses en quadrature par deux signaux à réponse partielle de classe 1 à 3 niveaux, ce qui donne lieu à une constellation de 9 points caractéristiques de la phase et de l'amplitude des signaux.

Spanish

Save record 8

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