公开(公告)号：BR0012541A

公开(公告)日：2002-11-26

申请号：BR0012541

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：ES2241627T3

公开(公告)日：2005-11-01

申请号：ES00948765

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Método para reducir la interferencia de acceso múltiple entre señales de comunicación transmitidas, en un sistema de comunicación compuesto de una estación base (106) y una pluralidad de estaciones de usuario (102, 108) que intercambian señales de comunicación entre la estación base (106) y cada una de la pluralidad de estaciones de usuario (102, 108); dicho método comprende: recibir (204, 302, 304, 400 a 420) una pluralidad de señales de acceso múltiple por división de código; hallar (216, 402) una primera señal de la pluralidad de señales de acceso múltiple por división de código que tenga la mayor amplitud; recibir (204, 302, 304, 400 a 420) una primera señal piloto asociada a la primera señal; determinar (402, 410) parámetros desde la primera señal piloto; decodificar (402, 410) primeros datos de la primera señal: construir (404, 408) una primera réplica de la primera señal desde los primeros datos; combinar (414) la primera réplica con parámetros derivados de la primera señal piloto para suministrar una primera señal sustractiva; y restar (418) la primera señal sustractiva de la pluralidad de señales de acceso múltiple por división de código para suministrar una primera pluralidad reducida de señales de acceso múltiple por división de código, en donde combinar (414) la primera réplica con parámetros derivados de la primera señal piloto para suministrar una primera señal sustractiva comprende: determinar (410) una amplitud de la primera señal piloto; normalizar (410) la amplitud de la primera señal piloto para suministrar una primera amplitud normalizada: derivar (412) un peso de la primera amplitud normalizada; y multiplicar (414) la primera réplica por el peso.

公开(公告)号：DE60019429D1

公开(公告)日：2005-05-19

申请号：DE60019429

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：CY1107676T1

公开(公告)日：2013-04-18

申请号：CY051100835

申请日：2005-07-08

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/707 ,  H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/7107 ,  H04B7/26

Abstract: Αρκετέςμέθοδοικαιαντίστοιχεςσυσκευέςμειώνουντιςπαρεμβολέςπολλαπλήςπροσπελάσεωςσεσυστήματαεπικοινωνιών (100) πολλαπλήςπροσπελάσεωςμεδιαίρεσηκώδικα, μέσωτεχνικώνεξουδετερώσεωςπαρεμβολών. Σχηματίζεταιμίαεκτίμησητηςαξιοπιστίαςεξουδετερώσεωςενόςισχυρότερουσήματοςπαρεμβολής, απότηνανάλυσηενόςπιλοτικούσήματοςπουσυνδυάζεταιμετοισχυρότεροσήμα. Ηεκτίμησηχρησιμοποιείταιγιαναεξαχθείμίαστάθμισηη οποίαπολλαπλασιάζεταιμεένααντίγραφοτουισχυρότερουσήματοςώστεναπαρασχεθείένασταθμισμένοαντίγραφο. Τοσταθμισμένοαντίγραφοαφαιρείταιαπόμίακαθυστερημένηέκδοσητουλαμβανόμενουδιαύλου. Ωςαποτέλεσμα, υλοποιείταισθεναράη εξουδετέρωσηπαρεμβολώνόταντοισχυρότεροαντίγραφοσήματοςείναιτοπιθανότεροναείναιακριβές, καιδενυλοποιείταισθεναράόταντοισχυρότεροαντίγραφοσήματοςδενείναιπιθανόνναείναιακριβές. Αυτόαποτρέπειτοσυνδυασμόενόςαντιγράφουτουισχυρότερουσήματοςμετολαμβανόμενοδίαυλο, ότανείναιπιθανότερονασυμβάλλειτοαντίγραφοσεεπιπρόσθετηπαρεμβολήαντίνατηνμειώνει.

公开(公告)号：AU6221700A

公开(公告)日：2001-02-05

申请号：AU6221700

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：DE60019429T2

公开(公告)日：2006-03-09

申请号：DE60019429

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：AT293308T

公开(公告)日：2005-04-15

申请号：AT00948765

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：PT1201042E

公开(公告)日：2005-06-30

申请号：PT00948765

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：DK1201042T3

公开(公告)日：2005-06-20

申请号：DK00948765

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

公开(公告)号：HK1047832A1

公开(公告)日：2003-03-07

申请号：HK03100044

申请日：2003-01-03

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26 ,  H04B

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.