METHOD FOR NON-LINEAR EQUALIZATION OF THE OPTICAL CHANNEL IN THE FREQUENCY DOMAIN

This invention relates to a method for non-linear equalization of the optical channel in the frequency domain in long range and high speed optical communication systems, which is based in an inverse Volterra series transfer in order to mitigate signal distortions in the said optical communication sy...

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Main Authors JESUS TEIXEIRA, ANTONIO LUIS, MOREIRA NOLASCO PINTO, ARMANDO HUMBERT, MAO CHEIA, PAULO, PEREIRA, GUIOMAR, FERNANDO PEDRO, GOMES FERREIRINHO LIMA RODRIGUEZ, CLAUDIO EMANUEL, DIAS REIS, JACKLYN
Format Patent
LanguageEnglish
French
Portuguese
Published 20.12.2012
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Summary:This invention relates to a method for non-linear equalization of the optical channel in the frequency domain in long range and high speed optical communication systems, which is based in an inverse Volterra series transfer in order to mitigate signal distortions in the said optical communication systems. It is characterized in that: - the phase and amplitude data are extracted from the received optical signal; - the signal components are digitized in analog-to-digital conversion devices; - the digitized signal feeds a physical unit of digital signal processing. La présente invention concerne un procédé d'égalisation non linéaire du canal optique dans le domaine de la fréquence, dans des systèmes de communication optique à longue portée et à débit élevé, basé sur une fonction de transfert inverse de Volterra, pour atténuation des distorsions du signal dans des systèmes de communications optiques. Ce procédé se caractérise en ce qu'il consiste à extraire du signal optique reçu des informations de phase et d'amplitude, à numériser les composantes du signal dans des dispositifs de conversion analogique-numérique, et à alimenter, avec le signal numérisé, une unité physique de traitement numérique de signal. O presente invento diz respeito a um método de equalização não-linear do canal óptico no domínio da frequência em sistemas de comunicação ótica de longo alcance e elevado débito que se baseia numa função de transferência inversa de Volterra, para mitigação das distorções do sinal em sistemas de comunicações ópticos. É caracterizado por: se extrair do sinal ótico recebido a informação de fase e amplitude; as componentes do sinal serem digitalizadas em dispositivos de conversão analógico- igital; o sinal digitalizado alimentar uma unidade física de processamento digital de sinal.
Bibliography:Application Number: WO2012PT00021