公开(公告)号：EP0812075A3

公开(公告)日：2000-03-15

申请号：EP97303261.8

申请日：1997-05-13

申请人： NORTEL NETWORKS CORPORATION

发明人： Roberts, Kim Bryron

IPC分类号： H04B10/18 ,  H04B10/08

CPC分类号： H04B10/2513

摘要： An optical transmission system includes means for measuring optical dispersion in the optical path, and a controllable element such as a dispersion compensator, operable in dependence on the measured value of dispersion. A low frequency dither on the optical signal causes timing jitter which varies according to the dispersion in the optical path. The timing jitter is extracted from a clock signal recovered from the optical signal. This jitter is correlated with the original dither to remove jitter effects caused by other mechanisms. Thus a value for dispersion is derived which can be used for monitoring or control purposes.

公开(公告)号：EP0707780B1

公开(公告)日：1999-01-27

申请号：EP94919524.2

申请日：1994-06-15

申请人： NORTHERN TELECOM LIMITED

发明人： FARUQUE, Saleh, Mohamed

IPC分类号： H04Q7/36

CPC分类号： H04W16/12 ,  H04W16/02 ,  H04W16/24

摘要： An N=3 frequency plan for 60 degree sector transmit sector receive (STSR) cell sites is based upon dividing available channels into 18 frequency groups. Frequency assignment is in accordance with an odd-even cyclic distribution of channels which provides a three-channel separation between sectors within a cell and an eight-channel separation between cells. This ensures adequate channel isolation between sectors and improved adjacent channel C/I performance throughout the network. The N=3 frequency plan increases channel capacity by approximately 38 % in AMPS and 114 % in TDMA-3.

公开(公告)号：EP0836371A1

公开(公告)日：1998-04-15

申请号：EP96307441.4

申请日：1996-10-11

申请人： NORTHERN TELECOM LIMITED

发明人： Murphy, R. G. ,  Dolan, Bruce I.

IPC分类号： H05K7/14

CPC分类号： H05K7/1448 ,  H05K1/117

摘要： A shelf for housing printed circuit boards in which a back plane has an extension in the form of a back plane extender printed circuit board electrically connected to the back plane and extending forwards from the back plane at one side of the shelf. In a location forwardly of the back plane, the extender printed circuit board carries a connector structure which extends outwards from the extender printed circuit board and has connectors outwards from the extender printed circuit board. These connectors are accessible either from the front or rear of the shelf dependent upon connector orientation. This structure avoids the need for connectors on the rear face of the back plane thus allowing for the back plane to be located further to the rear and permitting increase in size in circuit boards to be mounted within the shelf. The connector structure is preferably detachable so as to permit its replacement with a different design of connector structure. The connector structure may include its own printed circuit board which when changed for a board of different design may change the operation of the total circuit board arrangement including the back plane.

摘要翻译： 一种用于容纳印刷电路板的搁架，其中背面具有电连接到背板并且从搁板一侧的背面向前延伸的背面扩展器印刷电路板形式的延伸部。 在背面前方的位置，扩展印刷电路板承载从扩展器印刷电路板向外延伸的连接器结构，并且具有从扩展器印刷电路板向外的连接器。 这些连接器可以根据连接器方向从机架的前部或后部进入。 这种结构避免了对背面的后表面上的连接器的需要，从而允许背板进一步位于后部，并允许电路板中的尺寸增加以安装在搁板内。 连接器结构优选是可拆卸的，以便允许用不同的连接器结构设计进行更换。 连接器结构可以包括其自己的印刷电路板，当对于不同设计的电路板进行改变时，可以改变包括背板的总电路板布置的操作。

公开(公告)号：EP0767536A3

公开(公告)日：1998-04-08

申请号：EP96307223.6

申请日：1996-10-02

申请人： NORTHERN TELECOM LIMITED

发明人： Guay, Bernard ,  Altmann, Michael

IPC分类号： H03K5/151

CPC分类号： H03K5/151 ,  H03C1/542 ,  H03H11/1213 ,  H03K5/1532

摘要： A CML/ECL clock phase shifter device provides a 360° phase control range and, upon being provided with two CML clock signals related by a known phase difference, the device produces any desired phase in response to a control signal. The device uses a CMOS current switch which generates current signals having the amplitude adjustable with the control signal, which is a digital word. Differential pairs provide amplitude modulated current signals for the input clock and the variant of the input clock. Two MOS transmission networks selectively invert each amplitude modulated signal and sum the signals from each side on a load network. The phase control resolution is optimal over four quadrants for quadrature input clock signals.

公开(公告)号：EP0462572B1

公开(公告)日：1997-08-06

申请号：EP91109985.1

申请日：1991-06-18

申请人： NORTHERN TELECOM LIMITED

发明人： Lo, Wing Fai

IPC分类号： H04Q7/38 ,  H04B7/26 ,  H04L12/56

CPC分类号： H04W74/008 ,  H04W74/02 ,  H04W74/0833

公开(公告)号：EP0757863A1

公开(公告)日：1997-02-12

申请号：EP95914258.0

申请日：1995-04-05

申请人： NORTHERN TELECOM LIMITED

发明人： SANDLER, Howard, Martin ,  STRAWCZYNSKI, Leo ,  ALTEKAR, Shirish Ashok

IPC分类号： H04B7

CPC分类号： H04B7/12 ,  H04B7/0604

摘要： The invention provides a means by which a radio system in a multipath propagation environment may improve the probability of successful reception of a message by the application of diversity. It is applicable to such applications as paging, cordless telephones, cellular telephones, and radio identification tags. The transmitter sends the message repeatedly, each repetition transmitted from a different antenna. The antennas are separated so that multipath fading of the signal arriving at the receiver from each transmit antenna is substantially uncorrelated with the multipath fading of the signal arriving at the receiver from the other transmit antennas. The receiver examines the radio channel for an incoming message for a time period long enough for it to potentially receive the message from each antenna. Even if the message sent from one antenna is faded such that it cannot be received successfully at the portable receiver, the likelihood is that the message will be successfully received when it is transmitted from another antenna.

公开(公告)号：EP0755090A1

公开(公告)日：1997-01-22

申请号：EP96304416.9

申请日：1996-06-13

申请人： NORTHERN TELECOM LIMITED

发明人： Smith, Martin Stevens

IPC分类号： H01Q3/26 ,  H01Q25/00

CPC分类号： H01Q25/00 ,  H01Q3/2605

摘要： A base station arrangement including an antenna array is disclosed, wherein the uplink signals are weighted with complex array weights and the downlink signals are steered, wherein the downlink signals are steered using data from directional information derived from the uplink signals. A method of operation is also disclosed.

摘要翻译： 公开了一种包括天线阵列的基站装置，其中用复数阵列权重对上行链路信号进行加权，并且引导下行链路信号，其中使用从上行链路信号导出的方向信息的数据来控制下行链路信号。 还公开了一种操作方法。

公开(公告)号：EP0732739A1

公开(公告)日：1996-09-18

申请号：EP96301377.6

申请日：1996-02-29

申请人： NORTHERN TELECOM LIMITED

发明人： Ayliffe, Peter John ,  Harrison, Paul Mark ,  Geear, Martine Christopher ,  Parker, James Wilson ,  Peall, Robert George ,  Harcourt, Roger William

IPC分类号： H01L23/14 ,  H01L21/48

CPC分类号： H01L25/50 ,  G02B6/43 ,  H01L23/13 ,  H01L23/147 ,  H01L2924/0002 ,  H01L2924/3011 ,  H01L2924/00

摘要： This disclosure relates to the fabrication of components on a single crystal substrate. A method is disclosed of overcoming the problems encountered in defining etched features on a silicon substrate. In particular, there is disclosed a method of producing a multichip module comprising a silicon substrate having surface features for the placement of components. An organic dielectric is applied to the substrate prior to the use of an etchant whereby interconnects can be defined.

摘要翻译： 本公开涉及在单晶衬底上制造组件。 公开了一种克服在硅衬底上限定蚀刻特征时遇到的问题的方法。 特别地，公开了一种制造多芯片组件的方法，该多芯片组件包括具有用于放置部件的表面特征的硅衬底。 在使用蚀刻剂之前，将有机电介质施加到衬底上，从而可以定义互连。

公开(公告)号：EP0709974A1

公开(公告)日：1996-05-01

申请号：EP95307324.4

申请日：1995-10-16

申请人： NORTHERN TELECOM LIMITED

发明人： Edwards, Keith Russell

IPC分类号： H04B7/08

CPC分类号： H04B7/084 ,  H01Q1/246 ,  H04B7/0802 ,  H04B7/0857

摘要： This invention relates to radio communication systems and more especially to a base station arrangement comprising means to combine a number of signals input from receiving antennas. This invention is concerned with the combination techniques of spatially diverse systems and in particular seeks to provide a combination technique with performance close to optimal (maximal ratio) combiners but without the complexity. The invention provides a base station (10) arrangement which only processes the outputs from antennas (12) which contribute positively to the overall system carrier-to-noise ratio.

摘要翻译： 本发明涉及无线电通信系统，更具体地涉及一种包括组合从接收天线输入的多个信号的装置的基站装置。 本发明涉及空间多样的系统的组合技术，特别地寻求提供具有接近最佳（最大比）组合器的性能但没有复杂性的组合技术。 本发明提供一种基站（10）装置，其仅对来自天线（12）的输出进行处理，这对整个系统的载波噪声比有积极作用。

公开(公告)号：EP0704949A1

公开(公告)日：1996-04-03

申请号：EP95306045.6

申请日：1995-08-30

申请人： NORTHERN TELECOM LIMITED

发明人： Epworth, Richard Edward ,  King, Jonathan Paul

IPC分类号： H01S3/133 ,  H01S3/0941 ,  H01S3/06 ,  H01S3/25 ,  H04B10/145 ,  H04B10/155

CPC分类号： H04B10/291 ,  H01S3/06754 ,  H01S3/0941 ,  H01S5/0687 ,  H01S5/40 ,  H04B10/2912

摘要： An interferometric optical multiplexer (10) for use in optical communication systems and especially for use in optical communication systems employing fibre optical amplifiers is disclosed. The interferometric optical multiplexer has two input ports (12,14), an output port (16) and an output monitoring port (18). The interaction of the input signals is monitored by a photodetector situated in the monitoring part (18). In conjunction with a feedback circuit (24) wavelength separation of signals input at ports (12,14) is ensured. The system can be used to pump an erbium doped optical fiber amplifier.

摘要翻译： 公开了一种用于光通信系统，特别是用于采用光纤放大器的光通信系统中的干涉光学多路复用器（10）。 干涉光学多路复用器具有两个输入端口（12,14），输出端口（16）和输出监视端口（18）。 输入信号的相互作用由位于监测部分（18）中的光电检测器监测。 结合反馈电路（24），确保在端口（12,14）处输入的信号的波长分离。 该系统可用于泵浦掺铒光纤放大器。