-
公开(公告)号：EP0500761A1
公开(公告)日：1992-09-02
申请号：EP90917730.0
申请日：1990-11-05
申请人： QUALCOMM, INC.
CPC分类号： H04B1/7115 , H04B1/712 , H04B2201/70701 , H04L1/06
摘要： Sous-système récepteur à spectre dispersé destiné à l'utilisation dans un téléphone cellulaire et à accès multiple par différence de code possédant un récepteur rechercheur (44) servant à balayer la dimension temporelle afin d'utiliser le gain résultant du traitement à PB et les caractéristiques de discrimination dans le teemps du codage à spectre dispersé pour déterminer l'emplacement dans la dimension temporelle et la puissance du signal reçu lors du multiples réceptions d'un signal pilote parcourant un ou plusieurs trajets de propagation vers la réception. Le récepteur rechercheur (44) produit un signal de commande représentatif des signaux pilotes reçus dont les forces et la relation temporelle correspondante sont les plus élevées. Un récepteur de données (40, 42) reçoit des signaux de communication à spectre dispersé accompagnant chaque signal pilote reçu, et réagit au signal de commande rechercheur afin d'acquérir et de démoduler un signal de communication à spectre dispersé, concomitant du signal pilote dont la force est la plus élevée, et peut ainsi produire un signal de sortie codé et correspondant porteur d'informations.
-
公开(公告)号：EP0559840A1
公开(公告)日：1993-09-15
申请号：EP92904567.0
申请日：1991-11-27
申请人： QUALCOMM, INC.
IPC分类号： H03G3
CPC分类号： H03G3/3042 , H03G3/3078
摘要： Circuit de commande automatique de gain en boucle fermée (CAG) à plage dynamique élevée, pourvu d'un circuit amplificateur (18) servant à recevoir un signal d'entrée, dont la puissance est susceptible de variations, ainsi qu'un signal de commande. Le circuit amplificateur (18) réagit au signal de commmande pour amplifier le signal d''entrée selon un niveau d'amplification correspondant au signal de commande de manière à produire un signal de sortie correspondant. Un circuit de mesure (20) est couplé au moyen d'amplification (18) pour mesurer la puissance logarithmique du signal d'entrée amplifié et produire un signal de mesure linéaire correspondant. L'invention comprend un circuit intégrateur (22) servant à recevoir le signal de mesure et un signal de référence correspondant à la puissance souhaitée du signal de sortie. Le circuit intégrateur (22) intègre, en fonction du temps, la différence entre le signal de mesure et le signal de référence, et produit le signal de commande qui correspond au résultat de l'intégration.
-
3.发明公开METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM 失效的方法和设备，用于控制发送功率随单元格码分多址移动电话系统。
公开(公告)号：EP0500689A1
公开(公告)日：1992-09-02
申请号：EP90916945.0
申请日：1990-11-05
申请人： QUALCOMM, INC.
CPC分类号： H04W52/0245 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/40 , H04W52/52 , Y02D70/21
摘要： A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so as to arrive at the cell-site at a desired power level.
-
4.发明授权SYSTEM AND METHOD FOR GENERATING SIGNAL WAVEFORMS IN A CDMA CELLULAR TELEPHONE SYSTEM 失效系统和方法发生信号的波形CDMA蜂窝电话SYSTEM-
公开(公告)号：EP0536334B1
公开(公告)日：2002-05-22
申请号：EP91915727.1
申请日：1991-06-21
申请人： QUALCOMM, INC.
发明人： GILHOUSEN, Klein, S. , JACOBS, Irwin, M. , PADOVANI, Roberto , WEAVER, Lindsay, A., Jr. , WHEATLEY, Charles, E., III , VITERBI, Andrew, J.
CPC分类号： H04L1/0002 , H04B1/3888 , H04B1/707 , H04B1/70757 , H04B1/709 , H04B1/7115 , H04B7/2618 , H04B7/2628 , H04B7/2637 , H04B2201/70701 , H04B2201/70703 , H04J13/0022 , H04J13/0048 , H04J13/10 , H04J13/107 , H04J13/18 , H04L1/0006 , H04L1/0046 , H04L1/0065 , H04L1/0068 , H04L1/0071 , H04L1/06 , H04L1/08 , H04L5/02 , H04L5/12 , H04L23/02 , H04W52/26 , Y02D50/10
摘要： 1. A modulation system for use in spread spectrum communications, comprising: means for generating a first orthogonal sequence signal corresponding to a selected one of a plurality of orthogonal binary sequences; means for generating a pseudo-noise (PN) signal corresponding to a predetermined PN binary sequence; means for combining said first orthogonal sequence signal and said PN signal and for providing a resultant first modulation signal. 2. The system of 1 further comprising additional means for combining said first modulation signal with an input information signal and for providing a resultant spread spectrum information signal. 3. The system of 1 wherein said plurality of orthogonal binary sequences are Walsh sequences. 4. The system of 1 wherein said PN sequence is an augmented length maximal linear sequence PN code.
-
公开(公告)号：EP0553300B1
公开(公告)日：1999-05-12
申请号：EP92902054.3
申请日：1991-10-15
申请人： QUALCOMM, INC.
IPC分类号： H03G3/30
CPC分类号： H03G1/04 , H03G3/3036
-
6.发明授权METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM 失效的方法和设备，用于控制发送功率随单元格码分多址移动电话系统
公开(公告)号：EP0500689B1
公开(公告)日：1998-03-04
申请号：EP90916945.0
申请日：1990-11-05
申请人： QUALCOMM, INC.
IPC分类号： H04B7/005
CPC分类号： H04W52/0245 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/40 , H04W52/52 , Y02D70/21
摘要： A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so as to arrive at the cell-site at a desired power level.
-
公开(公告)号：EP0500775B1
公开(公告)日：1999-12-22
申请号：EP91900460.6
申请日：1990-11-05
申请人： QUALCOMM, INC.
CPC分类号： H04W36/18 , H04B2201/70701
摘要： In a cellular telephone system a system for directing communications between a mobile user (18) and cell-sites (12, 14, 16) as a mobile user (18) changes cell-site service areas. The mobile user (18) includes an apparatus (40, 46) for, while in communication with another system user via one cell-site, determining a transition of the mobile user (18) from the cell-site service area to the service area of another cell-site. The system includes circuitry (78) responsive to the indication for coupling communications between the mobile user and the other system user via the new cell-site while the mobile user also remains in communication with the system user via the first cell-site. The system further includes apparatus (78) responsive to the coupling of the communications between the mobile user and the other system user via the new cell-site for terminating the communications between the mobile user and another system user via cell-site with communications continuing between the mobile user and the system user via the new cell-site.
-
公开(公告)号：EP0553300A1
公开(公告)日：1993-08-04
申请号：EP92902054.0
申请日：1991-10-15
申请人： QUALCOMM, INC.
CPC分类号： H03G1/04 , H03G3/3036
摘要： Circuit d'amplification ayant un circuit de compensation (10) destiné à recevoir un signal de commande et à générer un signal de compensation en fonction de caractéristiques prédéterminées. Un circuit d'amplification d'entrée (12) est prévu pour recevoir un signal d'entrée et le signal de compensation, amplifier le signal d'entrée jusqu'à un niveau de gain d'entrée déterminé par le signal de compensation et fournir un signal de sortie correspondant du circuit d'amplification d'entrée. Un filtre (14) reçoit et filtre les composantes de fréquence non voulues pour les éliminer du signal de sortie du circuit d'amplification d'entrée. Un circuit d'amplification de sortie (16) est prévu pour recevoir le signal de sortie filtré du circuit d'amplification d'entrée et le signal de compensation, amplifier le signal de sortie du circuit d'amplification d'entrée, jusqu'à un niveau de gain de sortie déterminé par le signal de compensation et fournir un signal de sortie correspondant du circuit d'amplification de sortie.
-
9.发明公开SYSTEM AND METHOD FOR GENERATING SIGNAL WAVEFORMS IN A CDMA CELLULAR TELEPHONE SYSTEM 失效系统和方法发生信号波形的CDMA蜂窝电话SYSTEM-。
公开(公告)号：EP0536334A1
公开(公告)日：1993-04-14
申请号：EP91915727.0
申请日：1991-06-21
申请人： QUALCOMM, INC.
发明人： GILHOUSEN, Klein, S. , JACOBS, Irwin, M. , PADOVANI, Roberto , WEAVER, Lindsay, A., Jr. , WHEATLEY, Charles, E., III , VITERBI, Andrew, J.
CPC分类号： H04L1/0002 , H04B1/3888 , H04B1/707 , H04B1/70757 , H04B1/709 , H04B1/7115 , H04B7/2618 , H04B7/2628 , H04B7/2637 , H04B2201/70701 , H04B2201/70703 , H04J13/0022 , H04J13/0048 , H04J13/10 , H04J13/107 , H04J13/18 , H04L1/0006 , H04L1/0046 , H04L1/0065 , H04L1/0068 , H04L1/0071 , H04L1/06 , H04L1/08 , H04L5/02 , H04L5/12 , H04L23/02 , H04W52/26 , Y02D50/10
摘要： 1. A modulation system for use in spread spectrum communications, comprising: means for generating a first orthogonal sequence signal corresponding to a selected one of a plurality of orthogonal binary sequences; means for generating a pseudo-noise (PN) signal corresponding to a predetermined PN binary sequence; means for combining said first orthogonal sequence signal and said PN signal and for providing a resultant first modulation signal. 2. The system of 1 further comprising additional means for combining said first modulation signal with an input information signal and for providing a resultant spread spectrum information signal. 3. The system of 1 wherein said plurality of orthogonal binary sequences are Walsh sequences. 4. The system of 1 wherein said PN sequence is an augmented length maximal linear sequence PN code.
-
公开(公告)号：EP0500761B1
公开(公告)日：1998-02-11
申请号：EP90917730.5
申请日：1990-11-05
申请人： QUALCOMM, INC.
IPC分类号： H04L27/30
CPC分类号： H04B1/7115 , H04B1/712 , H04B2201/70701 , H04L1/06
摘要： A spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver (44) for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the location in the time domain and the received signal strength of multiple receptions of a pilot signal traveling upon one or more physical propagation paths to reception. The searcher receiver (44) provides a control signal indicative of the received pilot signals of greatest strength and corresponding time relationship. A data receiver (40, 42) receives spread spectrum communication signals accompanying each received pilot signal and is responsive to the searcher control signal for acquiring and demodulating a spread spectrum communication signal, concomitant with the pilot signal of greatest signal strength, and thus providing a corresponding encoded output signal bearing information.
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.014 秒)
