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公开(公告)号：DE19781950T1
公开(公告)日：1999-08-12
申请号：DE19781950
申请日：1997-08-08
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：ZA989420B
公开(公告)日：1999-05-04
申请号：ZA989420
申请日：1998-10-15
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , OVESJO FREDRIK
Abstract: A system and method for improving the accuracy of a location estimation measurement within a telecommunication system is disclosed. During a cessation of transmissions by a local base transceiver system in communication with the mobile station, the mobile station communicates with other, more remote base transceiver systems and trilateration and other distance measuring techniques are employed to calculate the position of the mobile station in relation to those remote base transceiver systems. In another embodiment of the present invention, the local base transceiver system is also used to calculate the position. In still another embodiment, during a cessation of transmissions by the mobile stations in communication with a local base transceiver system, the local base transceiver system is better able to use remote mobile stations for trilateration.
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公开(公告)号：SE9702597L
公开(公告)日：1999-01-05
申请号：SE9702597
申请日：1997-07-04
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , REVSBECH DAM HENRIK
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：DK2213013T3
公开(公告)日：2017-02-06
申请号：DK08705299
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：ES2394391T3
公开(公告)日：2013-01-31
申请号：ES08804043
申请日：2008-09-11
Applicant: ERICSSON TELEFON AB L M
Inventor： JOHANSSON MAGNUS , KARLSSON JONAS , GANNHOLM MAGNUS
Abstract: Un método para uso en un sistema celular (100) de telecomunicaciones, de acuerdo con cuyo método:se lleva a cabo la comunicación entre una estación (105) de control de una célula (110) y un 5 número de usuarios(140, 150) en dicha célula,la estación (105) de control está equipada con una pluralidad de antenas (120, 130),la comunicación puede cambiar entre un modo de comunicación de bucle abierto (OL), bucle cerrado (CL) yformación de haz (BF),los usuarios (140, 150) en la célula proporcionan a la estación de control información de retroalimentación, llamadainformación de calidad de canal (CQI), con relación a su calidad de recepción de transmisiones desde el sistema decontrol, siendo además el cambio del modo de comunicación de bucle abierto (OL), bucle cerrado (CL) y formaciónde haz (BF) dependiente de una relación señal - ruido e interferencia (SINR) en un usuario, una velocidad deinterferencia causada en células adyacentes y una exactitud de dirección de llegada (DoA) al usuario (UE);en el que el cambio comprende:cuando se está funcionando en bucle abierto:- si:la estimación de exactitud de dirección de llegada (DoA) es superior a una dirección de límite de llegada (TDOA), yla interferencia causada en células adyacentes es inferior a un límite de interferencia (TINT),- entonces conmutar a formación de haz;cuando se está funcionando en formación de haz:- si:la estimación de exactitud de dirección de llegada (DoA) es inferior o igual a la dirección de límite de llegada (TDOA) ola interferencia causada en células adyacentes es superior al límite de interferencia (TINT), yla información de calidad de canal (CQI) es poco fiable o la relación señal- ruido e interferencia (SINR) en el usuario(UE) es insuficiente.
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Patent Agency Ranking
公开(公告)号：RU2450450C2
公开(公告)日：2012-05-10
申请号：RU2010121934
申请日：2008-01-10
Applicant: ERICSSON TELEFON AB L M
Inventor： TINDERFEL DT TOBIAS , JOKHANSSON MAGNUS , KARLSSON JONAS
IPC: H04B7/08
Abstract: Изобретениеотноситсяк беспроводнымсистемамсвязи. Техническийрезультат - обеспечениеразныхрежимовпередачимножестваантеннвовремяпроцедурыпроизвольногодоступа. Изобретениераскрываетспособдляиспользованияв первомузлев системесвязибеспроводногодоступа. Всоответствиисоспособомпервыйузелуправляеттрафикомк иотпользователей, UE, вопределеннойобластив системе, соте, ипервыйузелоснащенмножествомантеннпередачи. Первыйузелможетиспользоватьмножестворежимовпередачимножестваантенндляпередачнисходящейлиниисвязи, т.е. передачв UE, ипервыйузелможетвыполнятьтакназываемуюпроцедурупроизвольногодоступа (RA) с UE, которыенеимеютвыделенногоресурсавосходящейлиниисвязи, т.е. ресурсав eNodeB. Всоответствиисоспособомодини тотжережимпередачимножестваантенннисходящейлиниисвязииспользуютс помощьюпервогоузлавовремяпроцедуры RA. 3 н. и 22 з.п. ф-лы, 6 ил.
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公开(公告)号：CA2328469C
公开(公告)日：2008-10-07
申请号：CA2328469
申请日：1999-05-07
Applicant: ERICSSON TELEFON AB L M
Inventor： KRONESTEDT FREDRIK , MAZUR SARA , OVESJO FREDRIK , KARLSSON JONAS
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：DE69833009D1
公开(公告)日：2006-02-02
申请号：DE69833009
申请日：1998-10-09
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , OVESJOE FREDRIK
Abstract: A system and method for improving the accuracy of a location estimation measurement within a telecommunication system is disclosed. During a cessation of transmissions by a local base transceiver system in communication with the mobile station, the mobile station communicates with other, more remote base transceiver systems and trilateration and other distance measuring techniques are employed to calculate the position of the mobile station in relation to those remote base transceiver systems. In another embodiment of the present invention, the local base transceiver system is also used to calculate the position. In still another embodiment, during a cessation of transmissions by the mobile stations in communication with a local base transceiver system, the local base transceiver system is better able to use remote mobile stations for trilateration.
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公开(公告)号：AU3340500A
公开(公告)日：2000-09-14
申请号：AU3340500
申请日：2000-02-25
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , ESMAILZADEH RIAZ
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：CA2327517A1
公开(公告)日：1999-10-14
申请号：CA2327517
申请日：1999-03-30
Applicant: ERICSSON TELEFON AB L M
Inventor： KARLSSON JONAS , FORSSEN ULF , DAM HENRIK , WIDEN JOHNNY , ANDERSSON SOREN
Abstract: A radiocommunication system is described wherein a flexible transceiver (400 ) is provided that can be switchably connected to different antenna structures (450, 460). Switching matrices (490) are provided between the antenna elemen ts and the receive processing circuitry (420) which, under the control of the central processing unit (430), allows the transceiver to handle the differen t antenna structures. The enhanced flexibility achieved by the present inventi on provides a novel transceiver which can, for example, be reconfigured between and during calls to dynamically assign resources based upon changes in the amount and type of load being experienced by the system and adjusted in orde r to render existing operating functions more efficient.
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