Zobrazeno 1 - 10
of 8 529
pro vyhledávání: '"Semmler, A."'
We propose to use Tomlinson-Harashima Precoding (THP) for the reconfigurable intelligent surface (RIS)-aided multiple-input multiple-output (MIMO) broadcast channel where we assume a line of sight (LOS) connection between the base station (BS) and th
Externí odkaz:
http://arxiv.org/abs/2409.02464
Statistical prior channel knowledge, such as the wide-sense-stationary-uncorrelated-scattering (WSSUS) property, and additional side information both can be used to enhance physical layer applications in wireless communication. Generally, the wireles
Externí odkaz:
http://arxiv.org/abs/2406.04282
We compare dirty paper coding (DPC) and linear precoding methods in a reconfigurable intelligent surface (RIS)- aided high-signal-to-noise ratio (SNR) scenario, where the channel between the base station (BS) and the RIS is dominated by a line-of-sig
Externí odkaz:
http://arxiv.org/abs/2405.18859
Reconfigurable intelligent surface (RIS) is a promising technology to enhance the spectral and energy efficiency in a wireless communication system. The design of the phase shifts of an RIS in every channel coherence interval demands a huge training
Externí odkaz:
http://arxiv.org/abs/2405.08585
We analyze and compare different methods for handling the mutual coupling in RIS-aided communication systems. A new mutual coupling aware algorithm is derived where the reactance of each element is updated successively with a closed-form solution. In
Externí odkaz:
http://arxiv.org/abs/2402.15423
Autor:
Classen, Anton, Corrêa, Raul, Fleischmann, Florian, Semmler, Simon, Pleinert, Marc-Oliver, Hommelhoff, Peter, von Zanthier, Joachim
We investigate two-electron interference in free space using two laser-triggered needle tips as independent electron sources, a fermionic realisation of the landmark Hanbury Brown and Twiss interferometer. We calculate the two-electron interference p
Externí odkaz:
http://arxiv.org/abs/2401.17088
We present efficient algorithms for the sum-spectral efficiency (SE) maximization of the multi-user reconfigurable intelligent surface (RIS)-aided multiple-input multiple-output (MIMO) broadcast channel based on a zero-forcing approach. These methods
Externí odkaz:
http://arxiv.org/abs/2311.11769
Reconfigurable intelligent surface (RIS) is considered a prospective technology for beyond fifth-generation (5G) networks to improve the spectral and energy efficiency at a low cost. Prior works on the RIS mainly rely on perfect channel state informa
Externí odkaz:
http://arxiv.org/abs/2309.04341
Autor:
Mathias Schneeweiss-Gleixner, Katharina Krenn, Mathias Petter, Patrick Haselwanter, Felix Kraft, Lukas Adam, Georg Semmler, Lukas Hartl, Emina Halilbasic, Nina Buchtele, Christoph Krall, Thomas Staudinger, Christian Zauner, Michael Trauner, Albert Friedrich Stättermayer
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-12 (2024)
Abstract Data on cholestasis and biliary injury in patients with COVID-19 are scarce. The primary aim of this study was to evaluate the prevalence of cholestasis and factors associated with its development and outcome in critically ill patients with
Externí odkaz:
https://doaj.org/article/3e33b0571bdd40a39d9f0371083c0921
In this work, we propose two methods that utilize data symbols in addition to pilot symbols for improved channel estimation quality in a multi-user system, so-called semi-blind channel estimation. To this end, a subspace is estimated based on all rec
Externí odkaz:
http://arxiv.org/abs/2308.16601