Distributed Precoder Design With Direct-Link Channel Information for Distributed Antenna Systems

In this study, we investigate distributed antenna systems (DASs) with partial channel state information (CSI). In the DAS considered here, one control unit coordinates multiple baseband units (BBUs), and each BBU with multiple distributed antennas (DAs) knows only the direct channels from its DAs to...

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Veröffentlicht in:IEEE transactions on vehicular technology Jg. 67; H. 4; S. 3679 - 3684
Hauptverfasser: Joung, Jingon, Nguyen, Hieu Duy, Sun, Sumei
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.04.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Antenna arrays
Antennas
average achievable rate
Channel coding
Channel state information
Distributed antenna system (DAS)
distributed precoder design
Interference
partial channel state information (CSI)
Precoding
Radiofrequency interference
Upper bounds
ISSN:0018-9545, 1939-9359
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Zusammenfassung:In this study, we investigate distributed antenna systems (DASs) with partial channel state information (CSI). In the DAS considered here, one control unit coordinates multiple baseband units (BBUs), and each BBU with multiple distributed antennas (DAs) knows only the direct channels from its DAs to its associated users and supports them simultaneously. For fairness among users, a distributed precoder structure is designed to maximize the upper bound of the minimum user rate, under the assumption that the direct channel dominates the intra-BBU interfering links. We then propose a distributed general precoder that allows multiple BBUs to serve multiple users simultaneously. Numerical results verify that, in terms of the minimum and average achievable rates, the proposed scheme significantly outperforms an existing scheme in which each BBU supports a single user. The results also demonstrate that the proposed scheme is comparable to a full-CSI based scheme.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2783219