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Fachgebietsleiter: Prof. Giuseppe Caire, Ph.D.
Er war Mitherausgeber der IEEE Transactions on Communications (1998-2001) und der IEEE Transactions on Information Theory (2001-2003). Im Jahr 2003 erhielt er die Jack Neubauer Best System Paper Auszeichung von der IEEE Vehicular Technology Society. Im Jahr darauf wurde ihm die Joint Paper Auszeichnung der IEEE Communications Society & Information Theory Society verliehen, die er 2011 erneut erhielt. Seit 2005 ist Giuseppe Caire IEEE Fellow. Er war von 2004 bis 2007 Mitglied des Direktoriums der IEEE Informations Theory Society, von 2008 bis 2013 Manager und 2011 ihr Präsident.
Giuseppe Caire ist auf der Thomson Reuters Liste der weltweit einflussreichsten Wissenschaftler 2014 verzeichnet. ("The World’s Most Influential Scientific Minds for 2014")
Google Scholar Profil: Zur Weiterleitung auf die Webseite von Google Scholar bitte hier klicken.
VIDEO: Zum abspielen des YouTube Videos der Alexander von Humboldt-Stiftung über Giuseppe Caire bitte hier klicken.
Publikationen
Zitatschlüssel | song2020fully |
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Autor | Song, Xiaoshen and Kühne, Thomas and Caire, Giuseppe |
Seiten | 1754-1769 |
Jahr | 2020 |
ISSN | 1558-2248 |
DOI | 10.1109/TWC.2019.2957227 |
Journal | IEEE Transactions on Wireless Communications |
Jahrgang | 19 |
Nummer | 3 |
Verlag | IEEE |
Zusammenfassung | Hybrid digital analog (HDA) beamforming has attracted considerable attention in practical implementation of millimeter wave (mmWave) multiuser multiple-input multiple-output (MU-MIMO) systems due to the low power consumption with respect to its fully digital baseband counterpart. The implementation cost, performance, and power efficiency of HDA beamforming depends on the level of connectivity and reconfigurability of the analog beamforming network. In this paper, we investigate the performance of two typical architectures that can be regarded as extreme cases, namely, the fully-connected (FC) and the one-stream-per-subarray (OSPS) architectures. In the FC architecture each RF antenna port is connected to all antenna elements of the array, while in the OSPS architecture the RF antenna ports are connected to disjoint subarrays. We jointly consider the initial beam acquisition and data communication phases, such that the latter takes place by using the beam direction information obtained by the former. We use the state-of-the-art beam alignment (BA) scheme previously proposed by the authors and consider a family of MU-MIMO precoding schemes well adapted to the beam information extracted from the BA phase. We also evaluate the power efficiency of the two HDA architectures taking into account the power dissipation at different hardware components as well as the power backoff under typical power amplifier constraints. Numerical results show that the two architectures achieve similar sum spectral efficiency, while the OSPS architecture is advantageous with respect to the FC case in terms of hardware complexity and power efficiency, at the sole cost of a slightly longer BA time-to-acquisition due to its reduced beam angle resolution. |