TERMIUM Plus®

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PSEUDO-NOISE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1998-08-21

English

Subject field(s)
  • Telecommunications
DEF

Noise that satisfies one or more of the standard tests for statistical randomness.

OBS

Although it seems to lack any definite pattern, pseudorandom noise contains a sequence of pulses that repeat themselves, albeit after a long time or a long sequence of pulses.

CONT

For example, in spread-spectrum systems, modulated carrier transmissions appear as pseudorandom noise to a receiver (a) that is not locked on the transmitter frequencies or (b) that is incapable of correlating a locally generated pseudorandom code with the received signal.

French

Domaine(s)
  • Télécommunications

Spanish

Campo(s) temático(s)
  • Telecomunicaciones
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Record 2 1982-11-15

English

Subject field(s)
  • Aeroindustry
CONT

By contrast, the performance of an FM system deteriorates rapidly after falling below a certain threshold. Phase-modulated signals, when properly processed, require less bandwidth and can be coded using pseudo-noise and spread-spectrum techniques, thus reducing the chance of enemy detection.

French

Domaine(s)
  • Constructions aéronautiques
CONT

Les ingénieurs de Hughes ont découvert qu'avec cette méthode l'image de télévision s'affaiblit graduellement à mesure qu'augmente l'intensité du signal de brouillage, alors que les performances d'un système utilisant la technique FM se dégradent rapidement lorsqu'elles sont tombées au-dessous d'un certain seuil. Les signaux modulés en phase, lorsqu'ils sont convenablement traités, exigent une moins grande largeur de bande et peuvent être codés au moyen des techniques de pseudo-bruit et d'étalement de spectre, ce qui diminue les risques de détection par l'ennemi.

Spanish

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