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EP0618692A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Passive optical telecommunicationssystem

Assignee: Nokia Solutions and Networks GmbH and Co KG
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Filing: 1993-03-30
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Granted: —
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Expires: 2013-03-30
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Abstract

Abstract Translated from German In einem passiven optischen Telekommunikationssystem wird bei der upstream-Übertragung ein elektrisches Trägersignal DPSK-moduliert, wonach das so modulierte elektrische Signal die Intensitätsmodulation des ausgesendeten Lichts bewirkt; bei der downstream-Signalübertragung wird das ausgesendete Licht von einem vorzugsweise gescrambelten NRZ-Basisband-Signal intensitätsmoduliert. Das Trägersignal wird durch Frequenzvervielfachung aus dem regenerierten Empfangstaktsignal der dezentralen Einrichtung abgeleitet. <IMAGE> In a passive optical telecommunications system, an electrical carrier signal is DPSK-modulated during upstream transmission, after which the electrical signal thus modulated effects the intensity modulation of the emitted light; in the downstream signal transmission, the emitted light is intensity-modulated by a preferably scrambled NRZ baseband signal. The carrier signal is derived by frequency multiplication from the regenerated receive clock signal of the decentralized device. <IMAGE>

Inventors

  • 👤 Thomas Dr. Bolze
  • 👤 Stephan Dr.-Ing. Neidlinger

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 17:11
CPC Classifications
H; H04; H04J; H04J14/00; H04J14/02; H04J14/0278; H04J14/028; H04B; H04B10/00; H04B10/27; H04B10/272; H04J14/0226; H04J14/0227; H04J14/0241; H04J14/0242; H04J14/0245; H04J14/0247; H04J14/0249; H04J14/0252; H04L; H04L5/00; H04L5/14; H04L5/143; H04J14/0282

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References Cited (Backward Citations)

EP0482943A2 Cited

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