A Low-Complexity SDMA Grouping Strategy for the Downlink of Multi-User MIMO Systems

Author

Maciel, Tarcisio F. ; Klein, Anja

Author_Institution

Commun. Eng. Lab, Darmstadt Technol. Univ.

fYear

2006

fDate

11-14 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

In this work, a sub-optimal space division multiple access (SDMA) grouping strategy is proposed for the downlink of multi-user MIMO systems. It uses a new spatial compatibility check metric to estimate the grouping efficiency without needing to compute MIMO filter weights, thus reducing the complexity of SDMA grouping. Moreover, an iterative variant of the block diagonalization for throughput maximization algorithm is proposed, which can be employed to select the number of streams allocated to each user as to increase the sum capacity of the SDMA group. The proposed SDMA strategy is compared through simulation with single-user transmission, random grouping, and exhaustive search, and it is shown to have a good performance-complexity trade-off

Keywords

4G mobile communication; MIMO communication; iterative methods; mobile radio; radio links; space division multiple access; block diagonalization for throughput maximization algorithm; exhaustive search; low-complexity SDMA grouping strategy; multi-user MIMO system downlink; multiple input multiple output system; random grouping; single-user transmission; space division multiple access; spatial compatibility check metric; Downlink; Filters; Iterative algorithms; Land mobile radio; Linear antenna arrays; MIMO; Mobile communication; Multiaccess communication; Space technology; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on

Conference_Location

Helsinki

Print_ISBN

1-4244-0329-4

Electronic_ISBN

1-4244-0330-8

Type

conf

DOI

10.1109/PIMRC.2006.253926

Filename

4022538