Title :
User Grouping of Two-Stage MU-MIMO Precoding for Clustered User Geometry
Author :
Junyoung Nam ; Young-Jo Ko ; Jeongseok Ha
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
This letter investigates how user grouping, more specifically group partitioning, affects the sum-rate performance of a two-stage multiuser MIMO precoding scheme referred to as joint spatial division and multiplexing (JSDM). Taking a clustered user geometry model into account, we propose a new criterion for user grouping to noticeably improve the sum-rate performance of JSDM. Numerical results confirm that the user grouping based on the proposed criterion yields substantial performance enhancement.
Keywords :
MIMO communication; geometry; multiuser channels; precoding; space division multiplexing; JSDM; clustered user geometry model; group partitioning; joint spatial division and multiplexing; sum-rate performance; two-stage multiuser MIMO precoding scheme; user grouping; Correlation; Downlink; Eigenvalues and eigenfunctions; Geometry; Interference; Manifolds; Measurement; MIMO; Wireless communication; multiuser channels;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2445349
