Transmission with linear precoding and limited feedback in multiuser MIMO systems - Details

Author：

Yang, Ruizhe (Yang, Ruizhe.) | Si, Pengbo (Si, Pengbo.) | Zhang, Ran (Zhang, Ran.) | Zhang, Yanhua (Zhang, Yanhua.) (Scholars：张延华)

Indexed by：

EI Scopus

Abstract：

In　this　paper,　a　novel　multiuser　MIMO　downlink　transmission　scheme　with　limited　feedback　and　linear　precoding　is　proposed,　using　maximum　signal-tojamming　and　noise　ratio　(SJNR)　criterion.　According　to　the　analysis　of　the　criterion,　it　is　shown　that　the　multiplexed　users　with　high　channel　gain　but　low　correlation　with　each　other　may　bring　high　system　capacity.　For　the　limited　feedback　scenario,　we　design　the　user　preselection　scheme　and　the　quantized　feedback　of　the　users＇　channel　vectors.　The　preselection　scheme,　taking　advantages　of　threshold　and　the　norm　of　inner　product　of　the　channel　vector　with　orthogonal　random　beam/orming,　significantly　reduces　the　feedback　load　and　preserves　the　tradeoff　between　the　channel　gain　and　correlation　of　users.　Simulation　results　show　that　the　proposed　scheme　has　much　higher　capacity　but　lower　feedback　load　compared　with　existing　schemes.　©　2010　IEEE.

Keyword：

Transmissions MIMO systems Multipath propagation

Author Community：

[ 1 ] [Yang, Ruizhe]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Si, Pengbo]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Zhang, Ran]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhang, Yanhua]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China