F
Felix Frey
Researcher at Heinrich Hertz Institute
Publications - 39
Citations - 518
Felix Frey is an academic researcher from Heinrich Hertz Institute. The author has contributed to research in topics: Quadrature amplitude modulation & Modulation. The author has an hindex of 13, co-authored 39 publications receiving 471 citations. Previous affiliations of Felix Frey include Fraunhofer Society & University of Ulm.
Papers
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Journal ArticleDOI
Bandwidth-Variable Transceivers based on Four-Dimensional Modulation Formats
Johannes Karl Fischer,Saleem Alreesh,Robert Elschner,Felix Frey,Markus Nolle,Carsten Schmidt-Langhorst,Colja Schubert +6 more
TL;DR: It is argued that four-dimensional modulation formats present an attractive complement to conventional polarization-multiplexed formats in the context of bandwidth-variable transceivers, where they enable a smooth transition with respect to spectral efficiency while requiring marginal additional hardware effort.
Journal ArticleDOI
Experimental demonstration of a format-flexible single-carrier coherent receiver using data-aided digital signal processing
Robert Elschner,Felix Frey,C. Meuer,J. K. Fischer,Saleem Alreesh,Carsten Schmidt-Langhorst,Lutz Molle,Takahito Tanimura,C. Schubert +8 more
TL;DR: It is shown that format-flexible coherent reception of different 28-GBd PDM and 4D modulated signals in WDM transmission experiments over up to 7680 km SSMF can be achieved by using the same resource-efficient digital signal processing algorithms for the equalization of all formats.
Proceedings ArticleDOI
Nonlinear digital pre-distortion of transmitter components
TL;DR: In this article, a concept for linear and nonlinear digital pre-distortion (DPD) of high-speed optical transmitters is introduced and investigated on a WDM trans mission of 32 GBd polariz ation-division multiplexed (P DM) M-QAM signals.
Proceedings ArticleDOI
Performance comparison of different 8QAM constellations for the use in flexible optical networks
Markus Nolle,Felix Frey,Robert Elschner,Carsten Schmidt-Langhorst,Antonio Napoli,Colja Schubert +5 more
TL;DR: It is experimentally show that a circular constellation outperforms the commonly used 8QAM constellation by 0.7 dB in terms of OSNR sensitivity at a BER of 3.8·10-3.9 dB.
Journal ArticleDOI
Generation, Transmission, and Detection of 4-D Set-Partitioning QAM Signals
Johannes Karl Fischer,Carsten Schmidt-Langhorst,Saleem Alreesh,Robert Elschner,Felix Frey,Pablo Wilke Berenguer,Lutz Molle,Markus Nolle,Colja Schubert +8 more
TL;DR: Comparing the reach and spectral efficiency of five-carrier Nyquist-WDM signals modulated by various 4-D SP-QAM formats and polarization-division multiplexed (PDM) QAM formats, the one with the highest spectral efficiency is PDM-64QAM encoding 12 bits/4-D symbol.