Exploiting statistical and outdated CSI in multiuser downlink transmission
Paper i proceeding, 2012

In this paper, we propose a multiuser downlink transmission scheme, which exploits both the statistical and outdated channel state information (CSI) at the transmitter. The proposed scheme extends the outdated CSI-aided scheme, first introduced by Maddah-Ali and Tse in [1] (denoted as MAT), by sending symbols demanded by a user along its statistical eigenmodes, instead of directly sending the symbols through separate antennas, and we refer to it as statistical eigenmode-MAT (SE-MAT). Considering zero-forcing receiver, we explicitly prove that the proposed SE-MAT scheme can achieve a higher ergodic sum-rate compared to the original MAT scheme, under different correlation conditions. Moreover, a user selection method which selects statistically orthogonal users for the SE-MAT transmission is proposed to further improve the system performance.


S. Jin

Southeast University

J. Wang

Southeast University

Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

X. Gao

Southeast University

International Conference on Wireless Communications and Signal Processing, WCSP 2012; Huangshan; China; 25 October 2012 through 27 October 2012



Elektroteknik och elektronik