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1. WO2000041338 - RECEIVER FOR SMOOTHING CHANNEL ESTIMATES USING SPECTRAL ESTIMATION

Publication Number WO/2000/041338
Publication Date 13.07.2000
International Application No. PCT/US1999/031164
International Filing Date 29.12.1999
Chapter 2 Demand Filed 18.07.2000
IPC
H04B 3/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
3Line transmission systems
02Details
04Control of transmission; Equalising
06by the transmitted signal
H04B 7/005 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
005Control of transmission; Equalising
H04B 7/26 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
24for communication between two or more posts
26at least one of which is mobile
H04L 25/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
CPC
H04B 1/7093
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
709Correlator structure
7093Matched filter type
H04B 1/7115
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7097Interference-related aspects
711the interference being multi-path interference
7115Constructive combining of multi-path signals, i.e. RAKE receivers
H04L 25/0204
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
0202Channel estimation
0204of multiple channels
Applicants
  • ERICSSON INC. [US/US]; 7001 Development Drive Research Triangle Park, NC 27709, US
Inventors
  • DENT, Paul, W.; US
Agents
  • MONCO, Dean, A.; Wood, Phillips, VanSanten, Clark & Mortimer 500 West Madison Street Suite 3800 Chicago, IL 60661-2511, US
Priority Data
09/227,18007.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) RECEIVER FOR SMOOTHING CHANNEL ESTIMATES USING SPECTRAL ESTIMATION
(FR) RECEPTEUR DE LISSAGE DES ESTIMATIONS DE VOIE PAR ESTIMATION SPECTRALE
Abstract
(EN)
A receiving apparatus comprises a receiver receiving signals via multiple propagation paths having different propagation delays and converting the signals to digital samples for processing. A channel estimator is operatively coupled to the receiver for correlating periodically selected groups of the digital samples corresponding to known symbols and periodically producing numerical estimates related to amplitudes and phases of the delayed propagation paths. A filter system filters the numerical estimates using filters periodically adapted to center frequencies of variations of the numerical estimates. A data decoder is operatively coupled to the receiver and the filter system for decoding data using the filtered estimates and the digital data.
(FR)
L'invention concerne un appareil de réception comprenant un récepteur qui reçoit des signaux via plusieurs trajets de propagation ayant différents temps de propagation et qui convertit les signaux en échantillons numériques aux fins de traitement. Un dispositif d'estimation de voie est relié fonctionnel au récepteur, pour assurer la corrélation entre des groupes d'échantillons numériques (correspondant aux symboles connus) sélectionnés périodiquement, et pour établir périodiquement des estimations numériques liées aux amplitudes et aux phases des trajets de propagation retardés. Un système de filtres filtre les estimations numériques en utilisant des filtres périodiquement adaptés aux fréquences centrales des variations relatives aux estimations numériques. Un décodeur de données est relié fonctionnel au récepteur et au système de filtres, pour assurer le décodage des données sur la base des estimations filtrées et des données numériques.
Also published as
DE19983889
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