S
S. Hoffmann
Researcher at University of Paderborn
Publications - 34
Citations - 1374
S. Hoffmann is an academic researcher from University of Paderborn. The author has contributed to research in topics: Phase-shift keying & Quadrature amplitude modulation. The author has an hindex of 10, co-authored 34 publications receiving 1261 citations.
Papers
More filters
Journal ArticleDOI
Hardware-Efficient Coherent Digital Receiver Concept With Feedforward Carrier Recovery for $M$ -QAM Constellations
TL;DR: In this paper, the authors proposed a novel digital carrier recovery algorithm for arbitrary M-ary quadrature amplitude modulation (M-QAM) constellations in an intradyne coherent optical receiver.
Journal ArticleDOI
Coherent optical communication: towards realtime systems at 40 Gbit/s and beyond.
TL;DR: The results of a realtime QPSK transmission system with a 3x3 coupler in the receiver are presented, with the achieved BER at a data rate of 1.4 Gbit/s is well below the FEC threshold.
Journal ArticleDOI
First Real-Time Data Recovery for Synchronous QPSK Transmission With Standard DFB Lasers
Timo Pfau,S. Hoffmann,R. Peveling,S. Bhandare,Selwan K. Ibrahim,O. Adamczyk,Mario Porrmann,Reinhold Noe,Y. Achiam +8 more
TL;DR: For the first time, synchronous quadrature phase-shift keying data is recovered in real-time after transmission with standard distributed feedback lasers using a digital inphase and quadratures receiver.
Journal ArticleDOI
Coherent Digital Polarization Diversity Receiver for Real-Time Polarization-Multiplexed QPSK Transmission at 2.8 Gb/s
Timo Pfau,R. Peveling,Jerome Hauden,N. Grossard,H. Porte,Y. Achiam,S. Hoffmann,Selwan K. Ibrahim,O. Adamczyk,S. Bhandare,David Sandel,Mario Porrmann,Reinhold Noe +12 more
TL;DR: A coherent digital polarization diversity receiver for real-time polarization-multiplexed synchronous quadrature phase-shift keying transmission with distributed feedback lasers at a data rate of 2.8 Gb/s was presented in this article.
Journal ArticleDOI
Frequency and Phase Estimation for Coherent QPSK Transmission With Unlocked DFB Lasers
S. Hoffmann,S. Bhandare,Timo Pfau,O. Adamczyk,C. Wordehoff,R. Peveling,Mario Porrmann,Reinhold Noe +7 more
TL;DR: This letter presents a hardware-efficient frequency estimator and an advanced phase estimation algorithm capable of tracking the phase noise of a 10-GBaud optical quadrature phase-shift-keying transmission system with standard distributed-feedback lasers in the presence of a frequency mismatch up to 1.2 GHz.