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公开(公告)号：SE9900684D0
公开(公告)日：1999-02-26
申请号：SE9900684
申请日：1999-02-26
Applicant: ERICSSON TELEFON AB L M
Inventor： ESMAILZADEH RIAZ , KARLSSON JONAS
Abstract: The invention is concerned with a radio receiver station, a multi-user interference cancellation unit and a multi-user cancellation method in a system with several transmitting radio stations. In the method, a radio signal is received as a sum of the signals from at least two of the transmitting radio stations in the system. Interference from at least two of the transmitting radio stations is cancelled. The interfering signals from at least some of the transmitting radio stations are processed in at least two separate operations in one or more stages, the result of each separate operation being taken into consideration in the estimation of the desired modulated signal sent to the receiver. Preferably, a part of the interfering signals is processed in one of the separate operations, while the rest of the interfering signals are processed in the other separate operations. If the cancellation is carried out in more than one step, the cancellation results of the first cancellation stage are used in the second interference cancellation stage, the method being correspondingly continued in the possible further cancellation stages.
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公开(公告)号：AU8249698A
公开(公告)日：1999-01-25
申请号：AU8249698
申请日：1998-06-05
Applicant: ERICSSON TELEFON AB L M
Inventor： DAM HENRIK , KARLSSON JONAS
Abstract: A radio communications system includes a radio base station provided with an array antenna. The antenna lobes of the array antenna can be directed onto a terminal with the aid of a generated directional estimate. The directional estimate is based on a signal received from the terminal. A method registers a generated directional estimate together with a terminal recognition character. The directional estimate is read when the radio connection with the terminal changes channel. The antenna lobe is directed on the basis of the direction estimate, immediately communication commences over the new channel. A radio base station is equipped with a database in which the terminal recognition character and the direction estimate are registered.
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公开(公告)号：ID18882A
公开(公告)日：1998-05-20
申请号：ID972854
申请日：1997-08-14
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , TEDER PAUL , EWERBRING LARS-MAGNUS
Abstract: A receiver device (703) downspreads signals from a band spreading signal, which generates downspread symbol sequences (803). A vector generator (704) generate symbol vectors (805) which include a symbol from each downspread symbol sequence (803). An auxiliary receiver (705) detects symbol vectors (805) in a first window (809) with the length of one symbol time. The auxiliary receiver (705) generates provisional estimates of the symbol vectors (805) with the help of a device with a first window algorithm (811). A delaying module (706) delays the symbol vectors (805) from the vector generator (704) by one symbol time before they reach a main receiver (707). The main receiver (707) detects in a second window (806) the symbol vectors (805) with the length of one symbol time. The main receiver (707) uses a device with a second window algorithm (808) in order to estimate the received symbol vectors (805) with reference taken to the previously estimated symbol vectors in the main receiver (705) and the provisional estimates of the symbol vectors (805) from the auxiliary receiver (705). A component generator (710) divides up the estimated symbol vectors (807) from the main receiver into separate components (815).
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公开(公告)号：CA2263520A1
公开(公告)日：1998-02-26
申请号：CA2263520
申请日：1997-08-08
Applicant: ERICSSON TELEFON AB L M
Inventor： TEDER PAUL , EWERBRRING LARS-MAGNUS , KARLSSON JONAS
Abstract: A receiver device (703) downspreads signals from a band spreading signal, which generates downspread symbol sequences (803). A vector generator (704) generates symbol vectors (805) which include a symbol from each downspread symbol sequence (803). An auxiliary receiver (705) detects symbol vectors (805) in a first window (809) with the length of one symbol time. The auxiliary receiver (705) generates provisional estimates of the symbol vectors (805) with the help of a device with a first window algorithm (811). A delaying module (706) delays the symbol vectors (805) from the vector generator (704) by one symbol time before they reach a main receiver (707). The main receiver (707) detects in a second window (806) the symbol vectors (805) with the length of one symbol time. The main receiver (707) uses a device with a second window algorithm (808) in order to estimate the received symbol vectors (805) with reference taken to the previously estimated symbol vectors in the main receiver (705) and the provisional estimates of the symbol vectors (805) from the auxiliary receiver (705). A component generator (710) divides up the estimated symbol vectors (807) from the main receiver into separate components (815).
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公开(公告)号：ES2693575T3
公开(公告)日：2018-12-12
申请号：ES16193141
申请日：2008-01-10
Applicant: ERICSSON TELEFON AB L M
Inventor： TYNDERFELDT TOBIAS , KARLSSON JONAS , JOHANSSON MAGNUS
Abstract: Un método (400) para usar en un primer nodo (110) en un sistema (100) de comunicación de acceso inalámbrico, que comprende los pasos de: - controlar (405) el tráfico hacia y desde los usuarios, los UE (120), dentro de una célula en el sistema; - emplear (415) una variedad de modos de transmisión multiantena, que comprenden diversidad de transmisión y multiplexación espacial, para transmisiones de enlace descendente, mediante el uso de una pluralidad de antenas (111,113) de transmisión; - realizar (420) procedimientos de acceso aleatorio (RA) con los UE que no tienen un recurso de enlace ascendente dedicado, es decir, un recurso para eNodoB, y que implica la transmisión de un mensaje de respuesta de acceso aleatorio a través de un canal compartido de enlace descendente, y la transmisión de un mensaje de resolución de contención, en el que se aplica el mismo modo de transmisión multiantena de enlace descendente en la transmisión del mensaje de respuesta de acceso aleatorio y en la transmisión del mensaje de resolución de contención, el mismo modo de transmisión multiantena de enlace descendente es del que el UE posee información.
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Patent Agency Ranking
公开(公告)号：PL2213013T3
公开(公告)日：2017-04-28
申请号：PL08705299
申请日：2008-01-10
Applicant: ERICSSON TELEFON AB L M (PUBL)
Inventor： TYNDERFELDT TOBIAS , JOHANSSON MAGNUS , KARLSSON JONAS
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公开(公告)号：CA2263520C
公开(公告)日：2008-10-14
申请号：CA2263520
申请日：1997-08-08
Applicant: ERICSSON TELEFON AB L M
Inventor： TEDER PAUL , EWERBRRING LARS-MAGNUS , KARLSSON JONAS
Abstract: A receiver device (703) downspreads signals from a band spreading signal, which generates downspread symbol sequences (803). A vector generator (704) generates symbol vectors (805) which include a symbol from each downspread symbol sequence (803). An auxiliary receiver (705) detects symbol vectors (805) in a first window (809) with the length of one symbol time. The auxiliary receiver (705) generates provisional estimates of the symbol vectors (805) with the help of a device with a first window algorithm (811). A delaying module (706) delays the symbol vectors (805) from the vector generator (704) by one symbol time before they reach a main receiver (707). The main receiver (707) detects in a second window (806) the symbol vectors (805) with the length of one symbol time. The main receiver (707) uses a device with a second window algorithm (808) in order to estimate the received symbol vectors (805) with reference taken to the previously estimated symbol vectors in the main receiver (705) and the provisional estimates of the symbol vectors (805) from the auxiliary receiver (705). A component generator (710) divides up the estimated symbol vectors (807) from the main receiver into separate components (815).
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公开(公告)号：ES2243061T3
公开(公告)日：2005-11-16
申请号：ES99928285
申请日：1999-05-07
Applicant: ERICSSON TELEFON AB L M
Inventor： OVESJO FREDERIK BENGT , KARLSSON JONAS , MAZUR SARA , KRONESTEDT FREDRIC
Abstract: Un método para transmitir información a una estación móvil (310, 330) en un sistema de radiocomunicaciones, que comprende las etapas de: - asignar un primer conjunto de códigos y un segundo conjunto de códigos a una estación base (320), siendo ortogonales, unos respecto a otros, los códigos que están dentro de cada uno de dichos primero y segundo conjuntos de códigos; - estimar (500, 600) una dirección angular de dicha estación móvil (310, 330) con respecto a dicha estación base (320); - identificar (504, 602) uno de dicho primer conjunto de códigos y dicho segundo conjunto de códigos para dicha estación móvil (310, 330) basándose en dicha dirección angular; - seleccionar (508, 606) un código de dicho conjunto de códigos identificado, si un código está disponible (506, 604) en dicho conjunto de códigos identificado; - expandir y convertir en aleatoria dicha información, usando dicho código seleccionado; y - transmitir dicha información expandida y convertida en aleatoria, a dicha estación móvil (310, 330).
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公开(公告)号：DE69926363D1
公开(公告)日：2005-09-01
申请号：DE69926363
申请日：1999-05-07
Applicant: ERICSSON TELEFON AB L M
Inventor： OVESJOE FREDERIK BENGT , KARLSSON JONAS , MAZUR SARA , KRONESTEDT FREDRIC
Abstract: Multiple code sets are introduced in the downlink of a CDMA system to allow for more connections in each cell. The codes are then allocated to different users taking into account the interference therebetween. The interference depends on the antenna gains, transmission powers used and cross-correlations between codes. By estimating these parameters the interference can be minimized in the code allocation process. Since the allocation of codes and code sets to geographical areas within a cell may change over time, code handoff is supported.
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公开(公告)号：MY114342A
公开(公告)日：2002-09-30
申请号：MYPI19973705
申请日：1997-08-13
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , TEDER PAUL , EWERBRING LARS-MAGNUS
Abstract: AN RECEIVER DEVICE (703) DOWNSPREADS SIGNALS FROM A BAND SPREADING SIGNAL, WHICH GENERATES DOWNSPREAD SYMBOL SEQUENCES (803). A VECTOR GENERATOR (704) GENERATES SYMBOL VECTORS (805) WHICH INCLUDE A SYMBOL FROM EACH DOWNSPREAD SYMBOL SEQUENCE (803). AN AUXILIARY RECEIVER (705) DETECTS SYMBOL VECTORS (805) IN A FIRST WINDOW (809) WITH THE LENGTH OF ONE SYMBOL TIME. THE AUXILIARY RECEIVER (705) GENERATES PROVISIONAL ESTIMATES OF THE SYMBOL VECTORS (805) WITH THE HELP OF A DEVICE WITH A FIRST WINDOW ALGORITHM (811). A DELAYING MODULE (706) DELAYS THE SYMBOL VECTORS (805) FROM THE VECTOR GENERATOR (704) BY ONE SYMBOL TIME BEFORE THEY REACH A MAIN RECEIVER (707). THE MAIN RECEIVER (707) DETECTS IN A SECOND WINDOW (806) THE SYMBOL VECTORS (805) WITH THE LENGTH OF ONE SYMBOL TIME. THE MAIN RECEIVER (707) USES A DEVICE WITH A SECOND WINDOW ALGORITHM (808) IN ORDER TO ESTIMATE THE RECEIVER SYMBOL VECTORS (805) WITH REFERENCE TAKEN TO THE PREVIOUSLY ESTIMATED SYMBOL VECTORS IN THE MAIN RECEIVER (705) AND THE PROVISIONAL ESTIMATES OF THE SYMBOL VECTORS (805) FROM THE AUXILIARY RECEIVER (705). A COMPONENT GENERATOR (710) DIVIDES UP THE ESTIMATED SYMBOL VECTORS (807) FROM THE MAIN RECEIVER INTO THE SEPARATE COMPONENTS (815).(FIG. 8)
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