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DC Field Value Language
dc.contributor.authorKim, Sungjin-
dc.contributor.authorPark, Chang Soon-
dc.contributor.authorKim, Hojin-
dc.contributor.authorLee, Kwang Bok-
dc.date.accessioned2009-08-13T03:10:19Z-
dc.date.available2009-08-13T03:10:19Z-
dc.date.issued2005-11-
dc.identifier.citationIEICE Trans. Commun., vol.E88-B, no.11, pp.4237-4245, Nov. 2005en
dc.identifier.issn0916-8516-
dc.identifier.urihttp://search.ieice.org/bin/summary.php?id=e88-b_11_4237&category=B-
dc.identifier.urihttp://hdl.handle.net/10371/7107-
dc.descriptionThis paper was presented in part at SPAWC 2005 [1].en
dc.description.abstractRecently, a number of techniques have been introduced to exploit
multiuser diversity of a wireless multiple-input multiple-output
(MIMO) broadcast channel (BC) that consists of a base station with
$t$ transmit antennas and $K$ users with multiple antennas. However,
prior works have ignored the rate overhead associated with feedback
of MIMO BC channel state information at transmitter (CSIT), which is
roughly $K$ times larger than single-user MIMO CSIT (i.e., it is
$\mathcal{O}(tr)$ where $r = \sum_{k=1}^K r_k$ and $r_k$ is the
number of antennas at the $k$th user). Considering the amount of
feedback signaling, quantization is a necessity for effective
feedback transmission as a form of partial CSIT. In this paper, we
propose the greedy multi-channel selection diversity (greedy MCSD)
scheme based on \emph{block} MMSE QR decomposition with dirty paper
coding (block MMSE-DP), where partial CSIT is almost sufficient. The
sum-rate performance of our novel scheme approaches extremely close
to the sum capacity of MIMO BC as the number of users increases,
whereas the feedback overhead is reduced by a factor of
$2t^3/L(t^2-t)$, in which $L$ is the number of \emph{active} channel
vectors. Simulation results validate the expectation from the
analysis. In addition, the proposed scheme is shown to be
appropriate for reconfigurable implementation.
en
dc.description.sponsorshipThis work was supported in part by National Research Laboratory (NRL) Program.en
dc.language.isoenen
dc.publisherInstitute of Electronics, Information and Communication Engineers (IEICE)en
dc.subjectMIMOen
dc.subjectSDR implementationen