EP 1733488 A1 20061220 - METHOD AND SYSTEM FOR MULTI-USER CHANNEL ESTIMATION IN DS-CDMA SYSTEMS
Title (en)
METHOD AND SYSTEM FOR MULTI-USER CHANNEL ESTIMATION IN DS-CDMA SYSTEMS
Title (de)
VERFAHREN UND SYSTEM ZUR MEHRNUTZER-KANALABSCHÄTZUNG IN DS-CDMA SYSTEMEN
Title (fr)
PROCEDE ET SYSTEME D'ESTIMATION POUR CANAL MULTI-UTILISATEUR DANS DES SYSTEMES DS-CDMA
Publication
Application
Priority
- CA 2005000543 W 20050408
- US 56059104 P 20040409
Abstract (en)
[origin: WO2005099130A1] The method and system for multi-user channel estimation in a multi-access network comprises: providing a communication signal (ri) providing an estimated communication signal Formula (I) generated using a spreading code signal (Ci), an information sequence signal (Bi) and a predicted composite channel impulse response signal Formula (II); comparing the communication signal (ri) to the estimated communication signal Formula (I) to provide an error signal (ɛi); and generating an estimated composite channel impulse response signal Formula (III) using the error signal (ɛi), the spreading code signal (Ci) and the information sequence signal (Bi); the predicted composite channel impulse response signal Formula (II) providing the multi-user channel estimation. The proposed method, which is based on a LMS like algorithm, is an efficient and low complexity method allowing estimating and tracking even fast times varying multi-path channels. Instantaneously, the composite channel impulse response is computed and estimates of all possible path energies are computed to be used as an indicator of the significant paths (delays).
IPC 8 full level
H04B 7/005 (2006.01); H04B 7/204 (2006.01); H04B 7/216 (2006.01); H04L 25/02 (2006.01); H04B 1/707 (2006.01); H04B 17/00 (2006.01)
CPC (source: EP)
H04L 25/0204 (2013.01); H04L 25/025 (2013.01); H04B 1/7105 (2013.01); H04B 17/3913 (2015.01); H04L 25/0212 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005099130 A1 20051020; EP 1733488 A1 20061220; EP 1733488 A4 20100714
DOCDB simple family (application)
CA 2005000543 W 20050408; EP 05734303 A 20050408