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CORR
2010
Springer

Outage Efficient Strategies for Network MIMO with Partial CSIT

8 years 3 months ago
Outage Efficient Strategies for Network MIMO with Partial CSIT
We consider a multi-cell MIMO downlink (network MIMO) where B base-stations (BS) with M antennas, connected to a central station (CS), transmit K messages to K singleantenna user terminals (UT) simultaneously. Although many works have shown the potential benefits of network MIMO, the conclusion critically depends on the underlying assumption of perfect channel state information at transmitters (CSIT). In this paper, we propose an outage-efficient strategy that requires only partial CSIT. Namely, with side information of all UT's messages and local CSIT, each BS applies zero-forcing (ZF) beamforming in a distributed manner, which creates K parallel MISO channels. Based on the statistical knowledge of these parallel channels, the CS performs a robust power allocation that jointly minimizes the outage probability of K UTs and achieves a diversity gain of B(M - K + 1) per UT. Numerical results show that even with partial CSIT network MIMO can be beneficial by providing high data rates...
Mari Kobayashi, Sheng Yang, Mérouane Debbah
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2010
Where CORR
Authors Mari Kobayashi, Sheng Yang, Mérouane Debbah, Jean-Claude Belfiore
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