Talks and Poster Presentations (with Proceedings-Entry):

S. Schwarz, M. Rupp:
"Antenna Combiners for Block-Diagonalization based Multi-User MIMO with Limited Feedback";
Talk: IEEE International Conference on Communications (ICC 2013), Budapest, Hungary; 06-06-2013 - 06-13-2013; in: "Proceedings of the IEEE International Conference on Communications (ICC 2013) - Workshop on Green Broadband Access: energy efficient wireless and wired network solutions", IEEE, (2013), 6 pages.

English abstract:
In this paper, we consider multi-user MIMO (MUMIMO)
based on block-diagonalization (BD) precoding with
limited feedback in the downlink of a cellular network. Noncodebook
based MU-MIMO is already considered in LTE Advanced
(LTE Rel. 10) as an important technology to improve the
average cell spectral efficiency. Still, channel state information
(CSI) feedback and downlink signaling are mainly designed for
single-user MIMO in LTE, with simple modifications to support
MU-MIMO in LTE-A. Thus, MU-MIMO improvements are a
hot topic for LTE Rel. 12 and beyond. With BD precoding,
the eNodeB transmits multiple data streams interference-free to
multiple user-equipments (UEs) in parallel. When BD is based
on limited feedback CSI, residual multi-user interference cannot
be avoided. If the number of receive antennas per UE is larger
than the number of data streams per UE, CSI feedback can
be optimized to minimize the effect of multi-user interference.
Additionally, the users can exploit the excess antennas to cancel
residual multi-user interference. Assuming varying degrees of
knowledge about the interference at the UEs, we propose different
receive antenna combiners and CSI feedback algorithms, and
compare their performance by means of link-level simulations.

Block-diagonalization, limited feedback, multiuser MIMO, subspace quantization, MIMO receivers, antenna combining

"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)

Created from the Publication Database of the Vienna University of Technology.