Robust transmit zero-forcing filters

Raphael Hunger, Frank A. Dietrich, Michael Joham, Wolfgang Utschick

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

42 Zitate (Scopus)

Abstract

We present linear and non-linear robust transmit zero-forcing filters for the downlink of multi-user multiple-input single-output (MU-MISO) time-division-duplex (TDD) systems which are robust with respect to errors in the channel state information (CSI) arising from channel estimation and time lags in mobile communications. Based on a set of estimated CSI of previous uplink slots, we apply a conditional mean to the cost function underlying the respective filter for the current downlink slot resulting in channel prediction for the CSI and robust filter structures. Thus, the respective transmit filters are less sensitive to imperfect channel knowledge and show dramatic performance improvements compared to their non-robust counterparts. Our approach can be interpreted as a joint optimization of channel prediction and preequalization. Additionally, we point out the relation of the presented approach to another robust technique named stochastic programming and show the analogy to a regularization approach.

OriginalspracheEnglisch
Titel2004 ITG Workshop on Smart Antennas - Proceedings
Seiten130-137
Seitenumfang8
PublikationsstatusVeröffentlicht - 2004
Veranstaltung2004 ITG Workshop on Smart Antennas - Proceedings - Munich, Deutschland
Dauer: 18 März 200419 März 2004

Publikationsreihe

Name2004 ITG Workshop on Smart Antennas - Proceedings

Konferenz

Konferenz2004 ITG Workshop on Smart Antennas - Proceedings
Land/GebietDeutschland
OrtMunich
Zeitraum18/03/0419/03/04

Fingerprint

Untersuchen Sie die Forschungsthemen von „Robust transmit zero-forcing filters“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren