Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Christian Wicpalek"'
Autor:
Andreas Springer, Christian Wicpalek, Siegfried Brandstaetter, T. Buckel, Damir Hamidovic, Stefan Tertinek, Alexander Klinkan, Peter Preyler, Thomas Mayer, Robert Weigel, Christoph Preissl
Publikováno v:
IEEE Transactions on Circuits and Systems I: Regular Papers. 65:4390-4403
A novel digital-intensive hybrid transmitter (TX) architecture is presented, combining conventional inphase and quadrature (I/Q) with constrained phase modulation. The proposed architecture utilizes an RF-DAC with phase modulated RF clock and adjuste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36c032889330e5ec205e65ba86407d7c
https://doi.org/10.1109/tcsi.2018.2840844
https://doi.org/10.1109/tcsi.2018.2840844
Autor:
Christian Wicpalek, Thomas Bauernfeind, Stefan Tertinek, Andreas Springer, Thomas Ussmueller, T. Buckel, Thomas Mayer, Robert Weigel
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 66:2618-2627
A multirate fractional-N RF digital phase-locked loop (DPLL) phase modulator implementation for polar transmitter supporting cellular communication standards up to 4G LTE-A is demonstrated. The RF-DPLL integrates LC-tank-based digital-controlled osci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9458666a89bdba38df5ad54549aada65
https://doi.org/10.1109/tmtt.2018.2811480
https://doi.org/10.1109/tmtt.2018.2811480
Autor:
Thomas Ussmueller, Stefan Tertinek, Thomas Bauernfeind, Robert Weigel, Andreas Springer, T. Mayer, T. Buckel, Christian Wicpalek
Publikováno v:
2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC).
A multirate, fractional-N RF digital phase-locked loop (DPLL) phase modulator implementation for polar transmitter supporting cellular communication standards up to 4G LTE-A is demonstrated for the first time. The RF-DPLL integrates LC-tank-based dig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92b5308dd80c592c4add0bd56b22b57f
https://doi.org/10.1109/rfic.2017.7969028
https://doi.org/10.1109/rfic.2017.7969028
Autor:
T. Mayer, Thomas Ussmueller, Christian Wicpalek, Stefan Tertinek, T. Buckel, Ram Sunil Kanumalli, Robert Weigel
Publikováno v:
ISCAS
The gain of a digitally controlled oscillator (DCO) represents a crucial parameter for wideband phase modulators utilized in polar transmitters supporting SC-FDMA in LTE uplink. Accurate normalization of the DCO gain is necessary for a two-point modu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1a497969b752b03e27c1c268fdd24bf
https://doi.org/10.1109/iscas.2016.7539001
https://doi.org/10.1109/iscas.2016.7539001
Autor:
Christian Wicpalek, T. Mayer, Stefan Tertinek, Peter Preyler, Robert Weigel, Thomas Ussmueller, T. Buckel, B. Neurauter
Publikováno v:
2014 44th European Microwave Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1972fac57cdaa6a1bc5eedba2cda7d1
https://doi.org/10.1109/eumc.2014.6986506
https://doi.org/10.1109/eumc.2014.6986506
Publikováno v:
ISCAS
Fully digital frequency synthesizers are increasingly used in radio frequency (RF) transceivers. The estimation and calibration of the gain for digital controlled oscillator (DCO) and time-to-digital converter (TDC) which is subject to process, volta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c233cd3a6578554888e856b7786bc067
https://doi.org/10.1109/iscas.2014.6865131
https://doi.org/10.1109/iscas.2014.6865131
Autor:
Zdravko Boos, T. Mayer, Robert Weigel, Y. Liu, Yangjian Chen, Linus Maurer, Christian Wicpalek, U. Vollenbruch
Publikováno v:
2008 IEEE Radio and Wireless Symposium.
This paper presents a new phase detector in an all digital phase locked loop which converts the phase difference between one reference clock edge and one divided oscillator edge into a digital word. This digital word can be converted into a digital r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca06171c23428663d95b2a55016efe1
https://doi.org/10.1109/rws.2008.4463454
https://doi.org/10.1109/rws.2008.4463454
Autor:
Y. Liu, Christian Wicpalek, U. Vollenbruch, Z. Boos, Robert Weigel, Yangjian Chen, Linus Maurer
Publikováno v:
2007 European Microwave Integrated Circuit Conference.
This paper presents a new structure of pulse shrinking time-to-digital converter (TDC) with 20 ps resolution which is implemented in Infineon 0.13 mum CMOS technology. The new interpolating multi-stage TDC with feedback loop and high speed counter ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33f3024957d7d5d95c7b3d9e9603a463
https://doi.org/10.1109/emicc.2007.4412700
https://doi.org/10.1109/emicc.2007.4412700
Publikováno v:
2007 European Conference on Wireless Technologies.
The concept of Cognitive Radio (CR) is based on detecting the environmental radio spectrum, sensing changes and responding/reacting accordingly. Environmental observation requires methods for interference detection and evaluating the current spectral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::154fe6c0227a72bfb94b7127add65dbc
https://doi.org/10.1109/ecwt.2007.4403948
https://doi.org/10.1109/ecwt.2007.4403948
Autor:
Christian Wicpalek, J. Winkel, Guenter Heinrichs, Linus Maurer, Gernot Hueber, R. Stuhlberger, Andreas Springer
Publikováno v:
2007 European Conference on Wireless Technologies.
This paper introduces a combined UMTS/GNSS receiver architecture with a single reconfigurable radio frequency (RF) front-end. After a review of the state-of-the-art for UMTS and NAVSAT receivers, a configurable UMTS/-GNSS architecture is proposed. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::379a537899650aafd107c562045eb294
https://doi.org/10.1109/ecwt.2007.4403947
https://doi.org/10.1109/ecwt.2007.4403947