Zobrazeno 1 - 10
of 2 305
pro vyhledávání: '"Mueller, P R"'
Interstellar Neutral Hydrogen in the Heliosphere: New Horizons Observations in the Context of Models
Autor:
Swaczyna, P., Bzowski, M., Dialynas, K., Dyke, L., Fraternale, F., Galli, A., Heerikhuisen, J., Kornbleuth, M. Z., Koutroumpa, D., Kowalska-Leszczyńska, I., Kubiak, M. A., Michael, A. T., Müller, H. -R., Opher, M., Rahmanifard, F.
Interstellar neutral (ISN) hydrogen is the most abundant species in the outer heliosheath and the very local interstellar medium (VLISM). Charge exchange collisions in the outer heliosheath result in filtration, reducing the ISN hydrogen density insi
Externí odkaz:
http://arxiv.org/abs/2406.09915
Autor:
Müller, Ralf R.
We propose a new continuous phase frequency shift keying that is particularly suited for multi-antenna communications when the link budget is critical and beam alignment is problematic. It combines the constant envelope of frequency modulation with l
Externí odkaz:
http://arxiv.org/abs/2402.10318
Autor:
Müller, Ralf R.
We propose Multi-Antenna (MA) Towards Inband Shift Keying (TISK): a new multi-carrier radio concept to cope with critical link budgets. In contrast to common proposals that rely on analog beamforming at both transmitter and receiver, MA-TISK does not
Externí odkaz:
http://arxiv.org/abs/2402.10307
Autor:
Rubin, Martin, Altwegg, Kathrin, Berthelier, Jean-Jacques, Combi, Michael R., De Keyser, Johan, Fuselier, Stephen A., Gombosi, Tamas I., Gudipati, Murthy S., Hänni, Nora, Kipfer, Kristina A., Ligterink, Niels F. W., Müller, Daniel R., Shou, Yinsi, Wampfler, Susanne F.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, stad3005, 2023
ESA's Rosetta spacecraft at comet 67P/Churyumov-Gerasimenko (67P) was the first mission that accompanied a comet over a substantial fraction of its orbit. On board was the ROSINA mass spectrometer suite to measure the local densities of the volatile
Externí odkaz:
http://arxiv.org/abs/2310.04095
Oxygen-bearing organic molecules in comet 67P's dusty coma: first evidence for abundant heterocycles
Autor:
Hänni, N., Altwegg, K., Baklouti, D., Combi, M., Fuselier, S. A., De Keyser, J., Müller, D. R., Rubin, M., Wampfler, S. F.
Publikováno v:
A&A 678, A22 (2023)
The puzzling complexity of terrestrial biomolecules is driving the search for complex organic molecules in the Interstellar Medium (ISM) and serves as a motivation for many in situ studies of reservoirs of extraterrestrial organics from meteorites an
Externí odkaz:
http://arxiv.org/abs/2308.00343
Autor:
Pestoni, Boris, Altwegg, Kathrin, Della Corte, Vincenzo, Hänni, Nora, Longobardo, Andrea, Müller, Daniel R., Rotundi, Alessandra, Rubin, Martin, Wampfler, Susanne F.
Publikováno v:
A&A 671, A168 (2023)
The European Space Agency's Rosetta mission to comet 67P/Churyumov-Gerasimenko has offered scientists the opportunity to study a comet in unprecedented detail. Four instruments of the Rosetta orbiter, namely, the Micro-Imaging Dust Analysis System (M
Externí odkaz:
http://arxiv.org/abs/2302.10535
Linear computation coding is concerned with the compression of multidimensional linear functions, i.e. with reducing the computational effort of multiplying an arbitrary vector to an arbitrary, but known, constant matrix. This paper advances over the
Externí odkaz:
http://arxiv.org/abs/2301.05615
This work studies a low-complexity design for reconfigurable intelligent surface (RIS)-aided multiuser multiple-input multiple-output systems. The base station (BS) applies receive antenna selection to connect a subset of its antennas to the availabl
Externí odkaz:
http://arxiv.org/abs/2212.13684
Classical antenna selection schemes require instantaneous channel state information (CSI). This leads to high signaling overhead in the system. This work proposes a novel joint receive antenna selection and precoding scheme for multiuser multiple-inp
Externí odkaz:
http://arxiv.org/abs/2212.13680
Autor:
Rosenberger, Hans, Gäde, Bernhard, Bereyhi, Ali, Ahmed, Doaa, Jamali, Vahid, Müller, Ralf R., Fischer, Georg, He, Gaoning, Debbah, Mérouane
Since the introduction of massive MIMO (mMIMO), the design of a transceiver with feasible complexity has been a challenging problem. Initially, it was believed that the main issue in this respect is the overall RF-cost. However, as mMIMO is becoming
Externí odkaz:
http://arxiv.org/abs/2212.11842