EP 3566337 A1 20191113 - DIGITAL PRE-DISTORTION FOR COMPLEX MODULATOR BASED-IMDD SYSTEM
Title (en)
DIGITAL PRE-DISTORTION FOR COMPLEX MODULATOR BASED-IMDD SYSTEM
Title (de)
DIGITALE VORVERZERRUNG FÜR EIN KOMPLEXES MODULATORBASIERTES IMDD-SYSTEM
Title (fr)
PRÉDISTORSION NUMÉRIQUE DE SYSTÈME IMDD BASÉ SUR UN MODULATEUR COMPLEXE
Publication
Application
Priority
EP 2017051928 W 20170130
Abstract (en)
[origin: WO2018137782A1] The present invention relates to a digital signal processing module in a transmitter of an optical transceiver. The digital signal processing module performs a bias-related linear transform in order to align, in a vector plane, the vector of an optical carrier signal with the vector of a modulated optical signal that is modulated by a modulator implemented inside the transmitter, and also performs a digital pre-distortion in order to compensate for the nonlinearity of the modulator. The digital pre-distortion method mainly consists in converting a target signal into a pre-distorted signal by subtracting a signal proportional to the distortion signal from the target signal. The non-orthogonality of the modulator is mitigated by an appropriate bias-related linear transform that is selected as to obtain the best quality performance using a scan method or as to obtain a maximum value of cross-correlation using a pilot tone method.
IPC 8 full level
H04B 10/40 (2013.01); H04B 10/58 (2013.01)
CPC (source: EP)
H04B 10/40 (2013.01); H04B 10/58 (2013.01)
Citation (search report)
See references of WO 2018137782A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2017051928 W 20170130; EP 17702358 A 20170130