@inproceedings{29217,
  abstract     = {{The circuit design and measurement results of a mixed-signal receiver baseband circuit for a wireless high data rate communication system are presented. The circuit design of the two most important system blocks of the sliced receiver baseband architecture, namely the broadband, programmable code-generator circuit, and the integrate and dump correlator circuit are explained. Using parallel sequence spread spectrum (PSSS) with PAM-4 modulated data, a net data rate of 2.22 Gbps is demonstrated with a single receiver baseband slice circuit working with a chip rate of 20 Gcps. A total of 15 slices are required to recover all 15 parallelly transmitted symbols resulting in the net data rate of 33.33 Gbps. This is the first reported implementation of a mixed-signal PSSS baseband circuit.}},
  author       = {{Javed, Abdul Rehman and Scheytt, J. Christoph}},
  booktitle    = {{2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)}},
  publisher    = {{IEEE}},
  title        = {{{Mixed-Signal Receiver Baseband Slice for High-Data-Rate Communication Using 130 nm SiGe BiCMOS Technology}}},
  doi          = {{10.1109/MWSCAS47672.2021.9531711}},
  year         = {{2021}},
}

@inproceedings{29221,
  abstract     = {{An m-sequence radar with a high chip rate of 20 Gcps is presented that makes use of the large bandwidth available in the V-band (40-75 GHz) or at 240 GHz to reduce the detection resolution to 7.5 mm. Measurement results of a mixed-signal radar receiver baseband (BB) integrated circuit designed using 130 nm SiGe BiCMOS technology are presented along with a novel radar ranging concept for the mixed-signal radar BB.}},
  author       = {{Javed, Abdul Rehman and Scheytt, J. Christoph}},
  booktitle    = {{2020 17th European Radar Conference (EuRAD)}},
  publisher    = {{IEEE}},
  title        = {{{M-Sequence Radar for High Resolution Ranging with Mixed-Signal Radar Receiver Baseband Using 130nm SiGe BiCMOS Technology}}},
  doi          = {{10.1109/EuRAD48048.2021.00029}},
  year         = {{2021}},
}

@inproceedings{29213,
  abstract     = {{This paper presents a technique to extend the frequency acquisition range for bang-bang phase-detector-based clock and data recovery (CDR) circuits without an additional frequency acquisition loop or lock detection circuit. The per-manent modulation of the offset current in the CDR's integral branch enhances the acquisition range by nearly 4 times, covering the entire tuning range of the voltage controlled oscillator. The increase in power dissipation and the chip area are negligible. This technique was implemented and measured in a 28 Gbps NRZ bang-bang CDR chip to confirm the working principle. In addition to the increased acquisition range, the CDR also surpasses jitter related specifications from the OIF CEI-28G-VSR standard.}},
  author       = {{Iftekhar, Mohammed and Gudyriev, Sergiy and Scheytt, J. Christoph}},
  booktitle    = {{The 2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium}},
  title        = {{{Reference-less Bang-bang CDR with Enhanced Frequency Acquisition Range Using Static and Modulated Integral Branch Offset Currents}}},
  doi          = {{10.1109/BCICTS50416.2021.9682207}},
  year         = {{2021}},
}

@inproceedings{29215,
  abstract     = {{We demonstrate a photonic-electronic analog-to-digital converter (ADC) offering a record-high acquisition bandwidth of 320 GHz. The system combines a high-speed electro-optic modulator with a Kerr comb for spectrally sliced coherent detection and is used for digitizing ultra-broadband data signals.}},
  author       = {{Fang, Dengyang and Drayß, Daniel and Lihachev, Grigory and Marin-Palomo, Pablo and Peng, Hui and Füllner, Christoph and Kuzmin, A and Liu, J and Wang, Ruoyu and Snigirev, Viacheslav and Lukashchuk, Anton and Zang, M and Kharel, P. and Witzens, Jeremy and Scheytt, J. Christoph and Freude, Wolfgang and Randel, Sebastian and Kippenberg, Tobias J. and Koos, Christian}},
  booktitle    = {{2021 European Conference on Optical Communication (ECOC)}},
  publisher    = {{IEEE}},
  title        = {{{320 GHz Analog-to-Digital Converter Exploiting Kerr Soliton Combs and Photonic-Electronic Spectral Stitching}}},
  doi          = {{10.1109/ECOC52684.2021.9606090}},
  year         = {{2021}},
}

@inproceedings{23992,
  author       = {{Adelt, Peer and Koppelmann, Bastian and Müller, Wolfgang and Scheytt, Christoph}},
  booktitle    = {{Workshop Methoden und Beschreibungssprachen zur Modellierung und Verifikation von Schaltungen und Systemen (MBMV 2021)}},
  title        = {{{Register and Instruction Coverage Analysis for Different RISC-V ISA Modules}}},
  year         = {{2021}},
}

@inproceedings{29203,
  abstract     = {{We present a monolithically integrated electronic-photonic Mach-Zehnder modulator with a linear, segmented driver on the same silicon substrate. As metric for the modulation efficiency, the external V$\pi$ is hereby reduced to only 420 mV.}},
  author       = {{Kress, Christian and Singh, Karanveer and Schwabe, Tobias and Preußler, Stefan and Schneider, Thomas and Scheytt, J. Christoph}},
  booktitle    = {{OSA Advanced Photonics Congress 2021}},
  keywords     = {{Analog to digital converters, Extinction ratios, Grating couplers, Modulation, Modulators, Phase shift}},
  pages        = {{IW1B.1}},
  publisher    = {{Optical Society of America}},
  title        = {{{High Modulation Efficiency Segmented Mach-Zehnder Modulator Monolithically Integrated with Linear Driver in 0.25 \textmum BiCMOS Technology}}},
  doi          = {{10.1364/IPRSN.2021.IW1B.1}},
  year         = {{2021}},
}

@article{29204,
  abstract     = {{An analysis of an optical Nyquist pulse synthesizer using Mach-Zehnder modulators is presented. The analysis allows to predict the upper limit of the effective number of bits of this type of photonic digital-to-analog converter. The analytical solution has been verified by means of electro-optic simulations. With this analysis the limiting factor for certain scenarios: relative intensity noise, distortions by driving the Mach-Zehnder modulator, or the signal generator phase noise can quickly be identified.}},
  author       = {{Kress, Christian and Bahmanian, Meysam and Schwabe, Tobias and Scheytt, J. Christoph}},
  journal      = {{Opt. Express}},
  keywords     = {{Analog to digital converters, Diode lasers, Laser sources, Phase noise, Signal processing, Wavelength division multiplexers}},
  number       = {{15}},
  pages        = {{23671–23681}},
  publisher    = {{OSA}},
  title        = {{{Analysis of the effects of jitter, relative intensity noise, and nonlinearity on a photonic digital-to-analog converter based on optical Nyquist pulse synthesis}}},
  doi          = {{10.1364/OE.427424}},
  volume       = {{29}},
  year         = {{2021}},
}

@inproceedings{29219,
  abstract     = {{We demonstrate for the first time, to the best of our knowledge, reconfigurable and real-time orthogonal time-domain demultiplexing of coherent multilevel Nyquist signals in silicon photonics. No external pulse source is needed and frequencytime coherence is used to sample the incoming Nyquist OTDM signal with orthogonal sinc-shaped Nyquist pulse sequences using Mach-Zehnder modulators. All the parameters such as bandwidth and channel selection are completely tunable in the electrical domain. The feasibility of this scheme is demonstrated through a demultiplexing experiment over the entire C-band (1530 nm - 1550 nm), employing 24 Gbaud Nyquist QAM signals due to experimental constraints on the transmitter side. However, the silicon Mach-Zehnder modulator with a 3-dB bandwidth of only 16 GHz can demultiplex Nyquist pulses of 90 GHz optical bandwidth suggesting a possibility to reach symbol rates up to 90 GBd in an integrated Nyquist transceiver. }},
  author       = {{Misra, Arijit and Singh, Karanveer and Meier, Janosch and Kress, Christian and Schwabe, Tobias and Preussler, Stefan and Scheytt, J. Christoph and Schneider, Thomas}},
  booktitle    = {{Electrical Engineering and Systems Science}},
  title        = {{{Reconfigurable and Real-Time Nyquist OTDM Demultiplexing in Silicon Photonics}}},
  doi          = {{https://doi.org/10.1364/OE.454163}},
  year         = {{2021}},
}

@misc{48630,
  author       = {{Kruse, Stephan and Scheytt, J. Christoph}},
  title        = {{{System mit optischer Trägerverteilung}}},
  year         = {{2021}},
}

@misc{48629,
  author       = {{Kruse, Stephan and Scheytt, J. Christoph}},
  title        = {{{Elektrooptischer Regelkreis}}},
  year         = {{2021}},
}

@article{23991,
  author       = {{Kruse, Stephan and Gudyriev, Sergiy and Kneuper, Pascal and Schwabe, Tobias and Kurz, Heiko G. and Scheytt, Christoph}},
  journal      = {{IEEE Microwave and Wireless Components Letters}},
  number       = {{6}},
  pages        = {{783--786}},
  title        = {{{Silicon Photonic Radar Transmitter IC for mm-Wave Large Aperture MIMO Radar Using Optical Clock Distribution}}},
  doi          = {{10.1109/LMWC.2021.3062112}},
  volume       = {{31}},
  year         = {{2021}},
}

@inproceedings{23995,
  author       = {{Kruse, Stephan and Bahmanian, Meysam and Kneuper, Pascal and Kress, Christian and Kurz, Heiko G. and Schneider, Thomas and Scheytt, Christoph}},
  booktitle    = {{The 17th European Radar Conference}},
  title        = {{{Phase Noise Investigation for a Radar System with Optical Clock Distribution }}},
  doi          = {{10.1109/EuRAD48048.2021.00018}},
  year         = {{2021}},
}

@inproceedings{23996,
  author       = {{Kneuper, Pascal and Kruse, Stephan and Luchterhandt, Bjoern and Tünnermann, Jan and Scharlau, Ingrid and Scheytt, Christoph}},
  booktitle    = {{The 17th European Radar Conference}},
  title        = {{{Sensory Substitution Device for the Visually Impaired Using 122 GHz Radar and Tactile Feedback }}},
  doi          = {{10.1109/EuRAD48048.2021.00034}},
  year         = {{2021}},
}

@article{29201,
  abstract     = {{As a complementary technology to existing Radio Frequency (RF)-based solutions such as Cellular V2X (C-V2X) and Dedicated Short Range Communication (DSRC), Vehicular VLC (V-VLC) is gaining more attention in the research community as well as in the industry. This paper introduces a complete IEEE 802.11 compliant V-VLC system. The system relies on Universal Software Radio Peripheral (USRP) software defined radios programmed using the GNU Radio framework, a typical car headlight plus a custom driver electronics for the high-power car LEDs (sender), and a photodiode (receiver). Building upon our earlier work, we, for the first time, experimentally explore the communication performance in outdoor scenarios, even in broad daylight, and show that rather simple optical modifications help to reduce the ambient noise to enable long distance visible light communication. Our system also supports Orthogonal Frequency-Division Multiplexing (OFDM) with a variety of Modulation and Coding Schemes (MCS) up to 64-QAM and is fully compliant with IEEE 802.11. We performed an extensive series of experiments to explore the performance of our system, even using higher order MCS in daylight. Our results demonstrated a high reliability for distances up to 75m with the presented system, regardless of the time of the day.}},
  author       = {{Amjad, Muhammad Sohaib and Tebruegge, Claas and Memedi, Agon and Kruse, Stephan and Kress, Christian and Scheytt, J. Christoph and Dressler, Falko}},
  journal      = {{IEEE Transactions on Vehicular Technology}},
  number       = {{6}},
  pages        = {{5749--5761}},
  title        = {{{Towards an IEEE 802.11 Compliant System for Outdoor Vehicular Visible Light Communications}}},
  doi          = {{10.1109/TVT.2021.3075301}},
  volume       = {{70}},
  year         = {{2021}},
}

@article{23993,
  author       = {{Bahmanian, Meysam and Scheytt, Christoph}},
  journal      = {{IEEE Transactions on Microwave Theory and Techniques}},
  number       = {{3}},
  pages        = {{1635--1645}},
  title        = {{{A 2-20-GHz Ultralow Phase Noise Signal Source Using a Microwave Oscillator Locked to a Mode-Locked Laser}}},
  doi          = {{10.1109/tmtt.2020.3047647}},
  volume       = {{69}},
  year         = {{2021}},
}

@inproceedings{29205,
  abstract     = {{We present the optical generation of a 300 Gbaud PRBS-7 data signal based on time-division multiplexing of Nyquist sinc-pulse sequences. The employed electronic and photonic components need only one-third of the final bandwidth.}},
  author       = {{Singh, Karanveer and Meier, Janosch and Preussler, Stefan and Kress, Christian and Scheytt, J. Christoph and Schneider, Thomas}},
  booktitle    = {{OSA Advanced Photonics Congress 2021}},
  isbn         = {{978-1-943580-94-1}},
  location     = {{Washington, DC United States}},
  pages        = {{SpTu4D.6}},
  publisher    = {{Optical Society of America}},
  title        = {{{Optical PRBS Generation with Threefold Bandwidth of the Employed Electronics and Photonics}}},
  doi          = {{https://doi.org/10.1364/SPPCOM.2021.SpTu4D.6}},
  year         = {{2021}},
}

@article{29202,
  author       = {{De, Souvaraj and Singh, Karanveer and Kress, Christian and Das, Ranjan and Schwabe, Tobias and Preußler, Stefan and Kleine-Ostmann, Thomas and Scheytt, J. Christoph and Schneider, Thomas}},
  journal      = {{IEEE Photonics Technology Letters}},
  number       = {{21}},
  pages        = {{1189--1192}},
  title        = {{{Roll-Off Factor Analysis of Optical Nyquist Pulses Generated by an On-Chip Mach-Zehnder Modulator}}},
  doi          = {{10.1109/LPT.2021.3112485}},
  volume       = {{33}},
  year         = {{2021}},
}

@article{29209,
  abstract     = {{We demonstrate an optical arbitrary waveform measurement (OAWM) system that exploits a bank of silicon photonic (SiP) frequency-tunable coupled-resonator optical waveguide (CROW) filters for gapless spectral slicing of broadband optical signals. The spectral slices are coherently detected using a frequency comb as a multi-wavelength local oscillator (LO) and stitched together by digital signal processing (DSP). For high-quality signal reconstruction, we have implemented a maximum-ratio combining (MRC) technique based on precise calibration of the complex-valued opto-electronic transfer functions of all detection paths. In a proof-of-concept experiment, we demonstrate the viability of the scheme by implementing a four-channel system that offers an overall detection bandwidth of 140 GHz. Exploiting a femtosecond laser with precisely known pulse shape for calibration along with dynamic amplitude and phase estimation, we reconstruct 100 GBd QPSK, 16QAM and 64QAM optical data signals. The reconstructed signals show improved quality compared to that obtained with a single high-speed intradyne receiver, while the electronic bandwidth requirements of the individual coherent receivers are greatly reduced.}},
  author       = {{Fang, Dengyang and Zazzi, Andrea and Müller, Juliana and Dray, Daniel and Fullner, Christoph and Marin-Palomo, Pablo and Tabatabaei Mashayekh, Alireza and Dipta Das, Arka and Weizel, Maxim and Gudyriev, Sergiy and Freude, Wolfgang and Randel, Sebastian and Scheytt, J. Christoph and Witzens, Jeremy and Koos, Christian}},
  issn         = {{0733-8724}},
  journal      = {{Journal of Lightwave Technology}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  pages        = {{1--1}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Optical Arbitrary Waveform Measurement Using Silicon Photonic Slicing Filters}}},
  doi          = {{10.1109/jlt.2021.3130764}},
  year         = {{2021}},
}

@article{29211,
  abstract     = {{Electrical-optical signal processing has been shown to be a promising path to overcome the limitations of state-of-the-art all-electrical data converters. In addition to ultra-broadband signal processing, it allows leveraging ultra-low jitter mode-locked lasers and thus increasing the aperture jitter limited effective number of bits at high analog signal frequencies. In this paper, we review our recent progress towards optically enabled time- and frequency-interleaved analog-to-digital converters, as well as their monolithic integration in electronic-photonic integrated circuits. For signal frequencies up to 65 GHz, an optoelectronic track-and-hold amplifier based on the source-emitter-follower architecture is shown as a power efficient approach in optically enabled BiCMOS technology. At higher signal frequencies, integrated photonic filters enable signal slicing in the frequency domain and further scaling of the conversion bandwidth, with the reconstruction of a 140 GHz optical signal being shown. We further show how such optically enabled data converter architectures can be applied to a nonlinear Fourier transform based integrated transceiver in particular and discuss their applicability to broadband optical links in general.}},
  author       = {{Zazzi, Andrea and Müller, Juliana and Weizel, Maxim and Koch, Jonas and Fang, Dengyang and Moscoso-Martir, Alvaro and Tabatabaei Mashayekh, Ali and Das, Arka D. and Drays, Daniel and Merget, Florian and Kartner, Franz X. and Pachnicke, Stephan and Koos, Christian and Scheytt, J. Christoph and Witzens, Jeremy}},
  issn         = {{2644-1349}},
  journal      = {{IEEE Open Journal of the Solid-State Circuits Society}},
  pages        = {{209--221}},
  publisher    = {{Institute of Electrical and Electronics Engineers (IEEE)}},
  title        = {{{Optically Enabled ADCs and Application to Optical Communications}}},
  doi          = {{10.1109/ojsscs.2021.3110943}},
  volume       = {{1}},
  year         = {{2021}},
}

@article{29212,
  author       = {{Fang, Dengyang and Zazzi, Andrea and Müller, Juliana and Daniel, Drayß and Füllner, Christoph and Marin-Palomo, Pablo and Mashayekh, Ali Tabatabaei and Das, Arka Dipta and Weizel, Maxim and Gudyriev, Sergiy and Freude, Wolfgang and Randel, Sebastian and Scheytt, J. Christoph and Witzens, Jeremy and Koos, Christian}},
  isbn         = {{978-1-943580-86-6}},
  journal      = {{OSA Technical Digest}},
  title        = {{{Optical Arbitrary Waveform Measurement (OAWM) on the Silicon Photonic Platform}}},
  doi          = {{10.1109/JLT.2021.3130764}},
  year         = {{2021}},
}