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canal à bande étroite [1 record]

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Record 1 2016-05-31

English

Subject field(s)
  • Radio Transmission and Reception
  • Marine and River Navigation Aids
  • Sonar and Underwater Detection (Military)
CONT

The basic defect of the receiving system was its high sensitivity to the reverberation generated by the set’s very high power transmissions and the use of rapid scanning to achieve omnidirectional coverage on a single transmission. This effectively precluded the separation of reverberation and noise backgrounds during processing. The only solution to this problem lay in the use of preformed receiving beams (as in Type 177), which allowed this separation, and, indeed, allowed parallel processing of narrow-band channels (cross-correlation or matched-filter processing) to reduce detection threshold and extract [Doppler] information.

French

Domaine(s)
  • Émission et réception radio
  • Aides à la navigation fluviale et maritime
  • Sonar et détection sous-marine (Militaire)

Spanish

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TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
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