公开(公告)号：US3697700A

公开(公告)日：1972-10-10

申请号：US3697700D

申请日：1970-12-21

申请人： BELL TELEPHONE LABOR INC

发明人： GREASON WILLIAM WALLACE ,  WEINER DAVID WILLIAM

IPC分类号： H04Q3/54 ,  H04Q3/22

CPC分类号： H04Q3/54

摘要： A telephone system suitable for use as a private branch exchange with 40 station and attendant lines or less is disclosed. It comprises a crossbar switching network that establishes call connections for station lines, registers and trunks under common control. PBX line hunting circuitry is integrated into the electromechanical switching network with electronic hunting gate arrangements in a group of station line circuits.

公开(公告)号：US07103383B2

公开(公告)日：2006-09-05

申请号：US10331762

申请日：2002-12-31

申请人： Teisuke Ito

发明人： Teisuke Ito

IPC分类号： H04M1/00 ,  H04Q3/22 ,  H04H7/30

CPC分类号： H04B7/0617 ,  H04B7/0408 ,  H04B7/086

摘要： An apparatus, system, method and computer program product for digital beamforming in the IF domain. The beamforming technique of the present invention can be implemented in general point-to-multipoint wireless networks to significantly increase bandwidth in both the downlink and uplink directions. This beamforming technique allows for a modular design of a smart antenna system which typically includes an antenna array, a multiple number of transceivers, IF beamformers, and a set of modems.

摘要翻译： 用于IF域数字波束成形的装置，系统，方法和计算机程序产品。 本发明的波束形成技术可以在一般的点对多点无线网络中实现，以显着增加下行链路和上行链路方向上的带宽。 该波束成形技术允许智能天线系统的模块化设计，其通常包括天线阵列，多个收发机，IF波束形成器和一组调制解调器。

公开(公告)号：US3865993A

公开(公告)日：1975-02-11

申请号：US36891373

申请日：1973-06-11

申请人： ITT

发明人： SYNEK JAN

IPC分类号： H04Q3/62 ,  H04Q3/22

CPC分类号： H04Q3/625

摘要： In a telephone PABX, a trunk incoming or two-way to the PABX must be capable of release on opening of the line at the central office or main exchange. The disclosed trunk release circuit is employed with an end marked, electronic switching network and will cause release of the network and trunk promptly on a release from the outside exchange. When an on-hook condition at the exchange is detected in the trunk circuit, the network path DC level is raised, allowing the originate control in the line circuit to turn on. After a short time period, an allotter pulse from the system allotter via the trunk allotter into the trunk circuit causes the network path to release, the line will reoriginate and the trunk circuit returns to an idle condition.

摘要翻译： 在电话PABX中，PABX的中继线或双向线路必须能够在中心局或主交换机的线路开放时释放。 所公开的中继线路释放电路与终端标记的电子交换网络一起使用，并且将在外部交换机的释放时迅速释放网络和干线。 当在中继电路中检测到交换机上的挂机状态时，网络路径DC电平升高，允许线路电路中的起始控制开启。 经过短时间后，分配器脉冲从系统分配器通过中继分配器进入中继电路，导致网络路径释放，线路将重新调整，中继电路恢复到空闲状态。

公开(公告)号：US3586785A

公开(公告)日：1971-06-22

申请号：US3586785D

申请日：1969-05-09

申请人： BELL TELEPHONE LABOR INC

发明人： FEINER ALEXANDER

IPC分类号： H04Q3/54 ,  H04Q3/22

CPC分类号： H04Q3/54

摘要： An arrangement is disclosed for delaying the release of a dialing connection between a calling telephone station and a central office register when the station prematurely disconnects to permit the station to originate another call within a specified interval of time. The register is returned to a state in which it can accept a new complement of dialing signals. If another call is not originated within the specified interval of time, the register and the dialing connection through the switching network of the central office are released.

公开(公告)号：US09112551B2

公开(公告)日：2015-08-18

申请号：US13885653

申请日：2010-11-15

申请人： Andreas Nilsson ,  Patrik Persson ,  Sven Petersson

发明人： Andreas Nilsson ,  Patrik Persson ,  Sven Petersson

IPC分类号： H04B7/04 ,  H04B1/00 ,  H04Q3/30 ,  H04Q3/22 ,  H01Q1/24 ,  H01Q3/30 ,  H01Q21/22 ,  H01Q3/22 ,  H01Q5/50

CPC分类号： H04B7/0408 ,  H01Q1/246 ,  H01Q3/22 ,  H01Q3/30 ,  H01Q5/50 ,  H01Q21/22 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/0067

摘要： A node in a wireless communication system comprising an antenna array with at least a first antenna function and a second antenna function. The node further comprises a first radio chain and a second radio chain, where each antenna function is connected to a base band via a corresponding radio chain. Each radio chain comprises an oscillator, a splitter and a multiplexer, each oscillator being arranged to feed a signal with a unique frequency band to the splitter in the same radio chain. The splitter is arranged to divide the signal into at least two signal parts and feed each part to the multiplexer of each radio chain such that each multiplexer in the node receives signal parts from each splitter in the node. The splitter is arranged to weight the division of the signal into the signal parts in dependence of the frequency bands fed by each oscillator.

摘要翻译： 包括具有至少第一天线功能和第二天线功能的天线阵列的无线通信系统中的节点。 节点还包括第一无线电链和第二无线电链，其中每个天线功能经由相应的无线电链路连接到基带。 每个无线电链包括振荡器，分离器和多路复用器，每个振荡器被布置成将具有唯一频带的信号馈送到相同无线电链中的分路器。 分配器被布置成将信号分成至少两个信号部分，并且将每个部分馈送到每个无线电链的多路复用器，使得节点中的每个多路复用器从节点中的每个分离器接收信号部分。 分配器被布置为根据由每个振荡器馈送的频带来加权信号到信号部分的分割。

公开(公告)号：US3697701A

公开(公告)日：1972-10-10

申请号：US3697701D

申请日：1970-12-21

申请人： BELL TELEPHONE LABOR INC

发明人： GREASON WILLIAM WALLACE ,  WEINER DAVID WILLIAM

IPC分类号： H04Q3/54 ,  H04Q3/22

CPC分类号： H04Q3/54

摘要： A telephone system suitable for use as a private branch exchange with 40 lines or less comprises a switching network that establishes call connections for station line circuits, registers and trunks under common control. Each line circuit comprises amplifier and gate control facilities which cooperate in the control of the switching network. The gate facilities include an address gate and a zener diode controlled gate which initially are scanned for detecting a service request and are rescanned on a callback operation to identify the calling line following a dialing operation.