EP 1632037 A2 20060308 - MIXED DIRECT-INDIRECT DAPTATION PROCEDURE APPLIED TO RECEIVER FILTER
Title (en)
MIXED DIRECT-INDIRECT DAPTATION PROCEDURE APPLIED TO RECEIVER FILTER
Title (de)
SYSTEME ZUR ENTZERRUNG UNTER VERWENDUNG VON PILOTSYMBOLUNTERDRÜCKUNG
Title (fr)
PROCEDURE D'ADAPTATION MIXTE DIRECTE ET INDIRECTE APPLIQUEE A UN FILTRE DE RECEPTEUR
Publication
Application
Priority
- CA 2004000757 W 20040521
- US 47278903 P 20030523
Abstract (en)
[origin: WO2004105264A2] An adaptive procedure that optimizes the parameters of a receiver filter such as a Multiuser Detection (MUD) applied to Direct-Sequence Code Division Multiple Access (DS-CDMA) is disclosed. This procedure takes into account the constraints imposed by the absence of training data sequences sent by the transmitter and required to adapt the filter parameters at the receiver. The adaptation consists in using two distinct data sequences transmitted through the same channel; one data sequence is transmitted as payload data and a second data sequence is transmitted as training data used to adapt the filter parameters at the receiver. Parameters of the receiver filter are adapted in presence of varying channels at the same time as the data information sequences are transmitted. The adaptation is realized following a mixed adaptation procedure based on a direct (without channel identification) and indirect (with channel identification) scheme. The invention is described for UMTS (Universal Mobile Telecommunications System) application in cellular communications system.
IPC 1-7
IPC 8 full level
H04B 1/707 (2011.01)
CPC (source: EP)
H04B 1/7103 (2013.01); H04B 1/7105 (2013.01); H04B 2201/70701 (2013.01)
Citation (search report)
See references of WO 2004105264A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004105264 A2 20041202; WO 2004105264 A3 20050922; CN 1806395 A 20060719; EP 1632037 A2 20060308
DOCDB simple family (application)
CA 2004000757 W 20040521; CN 200480016893 A 20040521; EP 04734198 A 20040521