Verfahren zur Vorkodierungsmatrixindexauswahl für einen MIMO-Empfänger basierend auf naher Maximum-Likelihood-Erkennung und Vorrichtung dafür

Details

Veröffentlichungs-Nr.

EP2469730

Aktenzeichen

EP10368050

Anmeldetag

21. Dezember 2010

Veröffentlichung

14. August 2013

Erteilung

14. August 2013

Rechtsraum

EP

IPC

H04B7/06H04B7/04

Abstract

A Process for selecting a Precoding Matrix Index (PMI) in a Multiple In Multiple Out (MIMO) receiver of a wireless communications comprising a base station communicating with User Equipments through a downlink and uplink channel, said base station applying a precoding on the transmit symbol vector based on a matrix Pi being selected from a set of predefined matrices and identified by a PMI index computed by said UE and forwarded to said base station via said uplink ; said process involving step of: - estimating (100) the MIMO channel matrix H of a given set of resources blocks comprising received symbol vectors; - estimating (200) the variance σ<2>of the additive noise (AWGN) - computing (300) for each particular matrix comprised within said set of predefined matrix a cost function Fi (Pi, H, σ<2>n ) being representative of the orthogonality of said matrix MIMO channel matrix H; - comparing (400) the values of said cost function Fi; and - transmitting (500) to said base station the index i corresponding to the Fi representative of the best conditionned MIMO channel matrix.

Anmelder

Firma

ST-Ericsson SA

Land

🇨🇭 Schweiz

Fachgebiete