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1. EP2742601 - MULTI-STAGE TURBO EQUALIZATION AND INTERFERENCE CANCELLATION RECEIVER FOR WIRELESS SYSTEMS

Office
European Patent Office
Application Number 12834956
Application Date 13.06.2012
Publication Number 2742601
Publication Date 18.06.2014
Publication Kind B1
IPC
H04B 1/712
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; 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
712Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
H04B 1/7107
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7097Interference-related aspects
7103the interference being multiple access interference
7107Subtractive interference cancellation
H04W 72/08
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling
04Wireless resource allocation
08based on quality criteria
H04W 72/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling
12Wireless traffic scheduling
CPC
H04W 72/082
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
04Wireless resource allocation
08where an allocation plan is defined; based on quality criteria
082using the level of interference
H04B 1/71075
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
7103the interference being multiple access interference
7107Subtractive interference cancellation
71075Parallel interference cancellation
H04B 1/712
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
712Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
H04W 72/1278
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
12Dynamic; Wireless traffic scheduling ; ; Dynamically scheduled allocation on shared channel
1278Transmission of control information for scheduling
Applicants ERICSSON TELEFON AB L M
Inventors WANG YI-PIN ERIC
GRANT STEPHEN
HE NING
JOHANSSON NIKLAS
SAMUEL BEBAWY MICHAEL
Designated States
Priority Data 201161540144 28.09.2011 US
13402297 22.02.2012 US
Title
(DE) MEHRSTUFIGER TURBOENTZERRUNGS- UND INTERFERENZUNTERDRÜCKUNGSEMPFÄNGER FÜR DRAHTLOSE SYSTEME
(EN) MULTI-STAGE TURBO EQUALIZATION AND INTERFERENCE CANCELLATION RECEIVER FOR WIRELESS SYSTEMS
(FR) RÉCEPTEUR D'ANNULATION DE BROUILLAGE ET DE TURBO ÉGALISATION MULTI-ÉTAGE POUR DES SYSTÈMES SANS FIL
Abstract
(EN) In a receive node (230) of a wireless network (100), an iterative multi-user multi-stage interference cancellation receiver (500, 1400, 1700) is used. The receiver (500, 1400, 1700) performs code-averaged equalization and chip chip-level code-specific interference over-cancellation on the received signals. This can result in a unified interference cancellation processing, and can avoid cumbersome calculations of code cross correlations that is required in symbol-level interference cancellation. A symbol-level code-averaged desired signal add-back is performed to address the over- cancellation of some desired signals.
(FR) Selon la présente invention, un récepteur d'annulation de brouillage itératif multi-utilisateur et multi-étage (500, 1400, 1700) est utilisé dans un nœud de réception (230) d'un réseau sans fil (100). Le récepteur (500, 1400, 1700) exécute une égalisation pondérée en termes de code et une sur-annulation de brouillage spécifique au code au niveau de la puce sur les signaux reçus. Ceci peut conduire à un traitement d'annulation de brouillage unifié et permet d'éviter des calculs complexes de corrélations croisées de code qui sont nécessaires dans une annulation de brouillage de niveau symbole. Un ajout de signal souhaité pondéré en termes de code et de niveau symbole est effectué pour prendre en charge la sur-annulation de certains signaux souhaités.
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