Joint beamforming and scheduling for a MIMO downlink with random arrivals

Mari Kobayashi, Giuseppe Caire

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

12 Zitate (Scopus)

Abstract

We study a number of downlink signaling strategies under perfect and non-perfect channel state information at the transmitter (CSIT) for the case of random packet arrivals. Under this setting, the relevant fairness criterion is the stabilization of all buffer queues which guarantees a bounded average delay for all users. In the case of perfect CSIT, different linear beamforming schemes are compared with the stability optimal policy based on dirty-paper coding (DPC). It is found that simple linear beamforming schemes with greedy user selection achieve near DPC performance in terms of the average delay. In the case of non-perfect CSIT due to a delayed feedback, we propose a novel greedy beamforming (heuristic) scheme together with "analog feedback" of CSI, where each user sends back its estimated channel vector without quantizing and coding. The proposed scheme outperforms the previously proposed schemes such as opportunistic beamforming and requires a similar feedback overhead.

OriginalspracheEnglisch
TitelProceedings - 2006 IEEE International Symposium on Information Theory, ISIT 2006
Seiten1442-1446
Seitenumfang5
DOIs
PublikationsstatusVeröffentlicht - 2006
Extern publiziertJa
Veranstaltung2006 IEEE International Symposium on Information Theory, ISIT 2006 - Seattle, WA, USA/Vereinigte Staaten
Dauer: 9 Juli 200614 Juli 2006

Publikationsreihe

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8101

Konferenz

Konferenz2006 IEEE International Symposium on Information Theory, ISIT 2006
Land/GebietUSA/Vereinigte Staaten
OrtSeattle, WA
Zeitraum9/07/0614/07/06

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