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81. 发明申请

WO1998014032A1 MAGNETIC FLUID LOUDSPEAKER ASSEMBLY WITH PORTED ENCLOSURE AND METHOD OF DETERMINING PARAMETERS THEREOF 审中-公开
标题翻译：具有外壳的磁性液体扬声器组件及其确定方法
公开(公告)号：WO1998014032A1
公开(公告)日：1998-04-02
申请号：PCT/CA1997000700
申请日：1997-09-22
申请人： NORTHERN TELECOM LIMITED
发明人： NORTHERN TELECOM LIMITED , VAN SCHYNDEL, André, John
IPC分类号： H04R09/02
CPC分类号： H04R9/027
摘要： A miniature loudspeaker assembly comprises a loudspeaker drive unit (10) housed in an enclosure (12). The drive unit (10) comprises a magnet unit (24) defining a magnetic air gap (18), a voice coil (16) extending at least partly in the air gap, and a diaphragm (14) coupled to and driven by the voice coil. Magnetic fluid (26) is injected into the air gap to occupy interstices between the voice coil and the poles (20, 22) of the magnet unit. The enclosure (12) has a volume between about one eighth and about double a compliance equivalent volume of the loudspeaker drive unit. Preferably, the enclosure volume is less than or equal to the compliance equivalent volume of the drive unit. The enclosure may have a port (52). The free space resonance frequency of the ported enclosure (12) may be between about 50 per cent and about 60 per cent of the free space resonance frequency of the loudspeaker drive unit.
摘要翻译：微型扬声器组件包括容纳在外壳（12）中的扬声器驱动单元（10）。驱动单元（10）包括限定磁性空气间隙（18）的磁体单元（24），至少部分地延伸在气隙中的音圈（16）以及耦合到声音并由其驱动的隔膜（14）线圈。将磁性流体（26）注入空气间隙，以占据音圈与磁体单元的极（20,22）之间的间隙。外壳（12）具有在扬声器驱动单元的符合等效体积的约八分之一至约两倍之间的体积。优选地，外壳体积小于或等于驱动单元的顺应性等效体积。外壳可以具有端口（52）。移动外壳（12）的自由空间共振频率可以在扬声器驱动单元的自由空间共振频率的约50％至约60％之间。

82. 发明申请

WO1998007263A2 DYNAMIC OPTIMIZATION OF HANDSFREE MICROPHONE GAIN 审中-公开
标题翻译： HANDSFREE麦克风增益的动态优化
公开(公告)号：WO1998007263A2
公开(公告)日：1998-02-19
申请号：PCT/CA1997000579
申请日：1997-08-08
申请人： NORTHERN TELECOM LIMITED
发明人： NORTHERN TELECOM LIMITED , MCCLENNON, Scott , DING, Heping , DAL FARRA, David
IPC分类号： H04M01/60
CPC分类号： H04M9/082
摘要： A system and method for dynamically optimizing the analog gain for a microphone in a telephone terminal operable in handsfree mode. The system makes use of a process whereby a relatively inexpensive analog to digital converter is used to meet gain requirements so as to accommodate the loudest echo through transmit path while maintaining an acceptable signal to noise ratio for the quietest talker. The system digital signal processor in conjunction with speech activity detection means is used to provide an optimum microphone gain under all circumstances.
摘要翻译：一种用于动态优化在免提模式下操作的电话终端中的麦克风的模拟增益的系统和方法。该系统利用一种使用相对便宜的模数转换器来满足增益要求的过程，以便通过发射路径适应最大的回波，同时保持最安静的讲话者可接受的信噪比。结合语音活动检测装置的系统数字信号处理器用于在所有情况下提供最佳麦克风增益。

83. 发明申请

WO1998006188A1 POWER LINE COMMUNICATIONS 审中-公开
标题翻译：电力线通信
公开(公告)号：WO1998006188A1
公开(公告)日：1998-02-12
申请号：PCT/GB1997002028
申请日：1997-07-25
申请人： NORTHERN TELECOM LIMITED , RICKARD, Robin, Paul
发明人： NORTHERN TELECOM LIMITED
IPC分类号： H04B03/56
CPC分类号： H04B3/54 , H04B3/56 , H04B2203/5408 , H04B2203/5441 , H04B2203/5458 , H04B2203/5466 , H04B2203/5483 , H04B2203/5491
摘要： An apparatus for coupling signals to a transmission line, such as a power line (120). The apparatus comprises an input for receiving a wanted signal; a first coupler for coupling the wanted signal (Vmain) onto the line at a first position (Y); a cancelling means (WB, WR, WY), coupled to the input, for deriving a cancelling signal (Vaux) from the wanted signal; a second coupler for coupling the cancelling signal onto the line at a second position (X), spaced from the first position; wherein the wanted signal and the cancelling signal destructively combine in a single direction of propagation along the line while enabling the wanted signal to propagate in the other direction along the line. The apparatus can be used to minimise radiation from an unshielded part of an electricity distribution network, such as substation (100), or to allow re-use of a frequency band on other power lines.
摘要翻译：一种用于将信号耦合到诸如电力线（120）的传输线的装置。该装置包括用于接收有用信号的输入端; 用于将有用信号（Vmain）耦合到第一位置（Y）的线上的第一耦合器; 耦合到输入的用于从所需信号导出抵消信号（Vaux）的消除装置（WB，WR，WY）; 第二耦合器，用于在与第一位置间隔开的第二位置（X）处将抵消信号耦合到线上; 其中有用信号和消除信号在沿着线的单个传播方向上破坏性地组合，同时使有用信号沿着该线沿另一个方向传播。该装置可以用于使诸如变电站（100）之类的配电网络的非屏蔽部分的辐射最小化，或允许在其它电力线上重新使用频带。

84. 发明申请

WO1998006187A1 POWER LINE COMMUNICATIONS 审中-公开
标题翻译：电力线通信
公开(公告)号：WO1998006187A1
公开(公告)日：1998-02-12
申请号：PCT/GB1997002027
申请日：1997-07-25
申请人： NORTHERN TELECOM LIMITED , RICKARD, Robin, Paul
发明人： NORTHERN TELECOM LIMITED
IPC分类号： H04B03/56
CPC分类号： H04B3/56 , H04B2203/5408 , H04B2203/5425 , H04B2203/5441 , H04B2203/5466 , H04B2203/5483 , H04B2203/5495
摘要： Apparatus for extracting communications signals from power lines, which lines are arranged such that leakage of signals occurs between them. The apparatus receives a signal from each of at least two of the lines (BLUE, RED, YELLOW) and combines the received signals so as to increase the ratio of wanted signal to interference plus noise /(I+N). Preferably the combining is achieved by weights (WB, WR, WY) and a summer (400). The weights phase shift and scale the received signals in amplitude. The apparatus can also be used for transmitting in the downstream direction.
摘要翻译：用于从电力线提取通信信号的装置，这些线被布置成使得它们之间发生信号泄漏。该装置从至少两条线路（蓝色，红色，黄色）中的每一条接收信号，并组合接收到的信号，以便增加有用信号与干扰加噪声比（S + / I）的比例。优选地，组合通过权重（WB，WR，WY）和夏季（400）来实现。权重相移并以幅度对接收的信号进行缩放。该装置也可以用于沿下游方向的传送。

85. 发明申请

WO1998006185A1 ECHO CANCELLING SYSTEM FOR DIGITAL TELEPHONY APPLICATIONS 审中-公开
标题翻译：用于数字电话应用的ECHO取消系统
公开(公告)号：WO1998006185A1
公开(公告)日：1998-02-12
申请号：PCT/CA1996000771
申请日：1996-11-25
申请人： NORTHERN TELECOM LIMITED
发明人： NORTHERN TELECOM LIMITED , HO, Dominic, King-Choi
IPC分类号： H04B03/23
CPC分类号： H04B3/23
摘要： An echo cancelling system for communication systems. The system includes an adaptive filter (34) that processes the speech signal re-constructed by a speech decoder (30) to generate an echo estimate. The echo estimate is subtracted from the echo containing signal propagating in the communication link to remove or at least reduce the echo corruption. The tap coefficients of the adaptive filter are established on the basis of an error signal that is representative of difference between the echo estimate and the actual echo and on the basis of a signal element that is a component of the re-constructed speech signal. The signal element is highly decorrelated using a decorrelation filter (38) to enable the adaptive filter to converge faster and manifest an improved echo return loss enhancement.
摘要翻译：一种用于通信系统的回波消除系统。该系统包括处理由语音解码器（30）重构的语音信号以产生回波估计的自适应滤波器（34）。从在通信链路中传播的包含回波的信号中减去回波估计，以去除或至少减少回波损坏。基于代表回波估计和实际回波之间的差异的误差信号，并且基于作为重构语音信号的分量的信号元素，建立自适应滤波器的抽头系数。信号元素使用去相关滤波器（38）进行高度去相关，使得自适应滤波器能够更快地收敛并显示出改进的回波回波损耗增强。

86. 发明申请

WO1998003048A1 EQUIPMENT RACK 审中-公开
标题翻译：设备架
公开(公告)号：WO1998003048A1
公开(公告)日：1998-01-22
申请号：PCT/GB1996001662
申请日：1996-07-12
申请人： NORTHERN TELECOM LIMITED , JORDAN, Alan
发明人： NORTHERN TELECOM LIMITED
IPC分类号： H05K07/18
CPC分类号： H05K7/183 , H04Q1/06 , H04Q1/09 , H04Q1/112
摘要： An equipment rack has a strengthened base and folded side members to provide Zone 4 earthquake protection. When the rack is mounted on a support surface, the mounting bolts securing the rack are overtightened so as to distort the base member and thus prestress the structure. This improves rigidity when the rack is subjected to earthquake vibration.
摘要翻译：设备架具有加强的基座和折叠侧构件，以提供4区的地震保护。当机架安装在支撑表面上时，固定机架的安装螺栓过紧，从而使基座部件变形，从而对结构进行预应力。当机架受到地震振动时，可以提高刚性。

87. 发明申请

WO1998002012A1 ATM TELECOMMUNICATIONS SYSTEMS AND METHOD FOR ROUTING NARROW BAND TRAFFIC 审中-公开
标题翻译： ATM电信系统和路由窄带业务的方法
公开(公告)号：WO1998002012A1
公开(公告)日：1998-01-15
申请号：PCT/GB1997001779
申请日：1997-07-03
申请人： NORTHERN TELECOM LIMITED , BRUECKHEIMER, Simon, Daniel , MAUGER, Roy, Harold , STACEY, David, John
发明人： NORTHERN TELECOM LIMITED
IPC分类号： H04Q11/04
CPC分类号： H04L12/5601 , H04J2203/0066 , H04J2203/0067 , H04L49/255 , H04L49/3081 , H04L2012/5619 , H04L2012/563 , H04L2012/5663 , H04Q11/0478
摘要： A telecommunications system comprises an asynchronous transfer mode (ATM) network having uncommitted bandwidth, and a plurality of adaptive grooming routers (AGR) coupled to the network. The AGRs comprise a group adapted to function as a virtual transit exchange whose fabric and control are distributed over the group. The virtual comprising the AGRs incorporates independent connection control and call routing functions and has means for determining the current system status whereby to set up narrow band connections across the ATM network based on that status determination.
摘要翻译：电信系统包括具有未提交带宽的异步传输模式（ATM）网络和耦合到该网络的多个自适应梳理路由器（AGR）。 AGR包括适用于虚拟中转交换机的组，其组合和控制分布在组中。包括AGR的虚拟机包括独立的连接控制和呼叫路由功能，并且具有用于基于该状态确定来确定跨越ATM网络建立窄带连接的当前系统状态的装置。

88. 发明申请

WO1997050262A2 SYSTEM AND METHOD FOR INTERFACING A STANDARD TELEPHONY DEVICE TO A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：将标准电话设备连接到无线通信系统的系统和方法
公开(公告)号：WO1997050262A2
公开(公告)日：1997-12-31
申请号：PCT/CA1996000762
申请日：1996-11-20
申请人： NORTHERN TELECOM LIMITED
发明人： NORTHERN TELECOM LIMITED , SANDLER, Howard, Martin , KOOHGOLI, Mahshad , PARKER, Jerry, J.
IPC分类号： H04Q07/20
CPC分类号： H04W84/14
摘要： A system for providing fixed wireless access to standard telephony device is disclosed. A subscriber unit comprising a telephony interface for connecting to a standard telephony device, and a transceiver for establishing a communication link with a wireless network is used for providing telephony service to standard telephony device. Dual tone multiple frequency (DTMF) tones produced by said standard telephony device are sent to the wireless network, either directly or indirectly in the form of digit messages corresponding to the dialed digits, after a call set up message is sent. The subscriber unit sends a special set up message which identifies the subscriber unit as a terminal which sends digits on a digit by digit basis. A wireless network component (e.g. an MSC) is configured to identify such a set up message and upon receiving such a set up message collects and analyses digits sent by a subscriber unit on a digit by digit basis in order to provide a service feature or to connect a call._
摘要翻译：公开了一种用于向标准电话设备提供固定无线接入的系统。包括用于连接到标准电话设备的电话接口和用于建立与无线网络的通信链路的收发器的用户单元用于向标准电话设备提供电话服务。在发送呼叫建立消息之后，由所述标准电话设备产生的双音多频（DTMF）音调被直接或间接地以对应于拨号数字的数字消息的形式发送到无线网络。用户单元发送特殊的建立消息，其将用户单元标识为以数字为单位发送数字的终端。无线网络组件（例如MSC）被配置为识别这样的建立消息，并且在接收到这样的建立消息时，逐个基础地收集和分析由用户单元发送的数字，以便提供服务特征或连接一个call._

89. 发明申请

WO1997049536A1 AN ANTENNA DIELECTRIC 审中-公开
标题翻译：天线电介质
公开(公告)号：WO1997049536A1
公开(公告)日：1997-12-31
申请号：PCT/GB1997001697
申请日：1997-06-25
申请人： NORTHERN TELECOM LIMITED , McKINNON, John, Peter, Bruce , ARNOLD, Mark, Hanley , McALINDEN, Michael, John
发明人： NORTHERN TELECOM LIMITED
IPC分类号： B29C44/10
CPC分类号： H01Q9/285 , B29C44/10
摘要： Many types of antenna comprise a ground plane spaced apart from a dielectric film or sheet which supports a microstrip pattern comprising printed patch radiating elements by a dielectric spacer, such as flat plate antennas (otherwise known as layered antennas). For modern telecommunications applications various factors need to be taken into account, such as size, weight, cost and ease of construction of the antenna. At high frequencies, e.g. above 100 MHz, circuit losses increase as the frequencies increase due to, inter alia, dielectric spacing. The present invention provides an antenna dielectric having a thickness of less than 3 mm, having a relative dielectric permitivity approaching that of air whereby circuit and transmission line losses are minimised. In accordance with another aspect of the invention, there is provided an antenna ground plane substrate comprising an expanded polystyrene substrate produced by a two-stage moulding process. Introducing the pre-expanded beads into a two-position mould cavity in a first position dimensioned to enable a uniform distribution of beads; reducing the size of the cavity passing steam through the mould whereby the polystyrene beads further expand; reducing the pressure within the mould to a partial vacuum whereby the polystyrene cools and assumes a solid state and the moisture due to the steam is removed; and removing the substrate from the mould and heating the substrate at a temperature above ambient in dry air. The two-stage polystyrene is coated with a conductive coating to provide a conductive surface of uniform smoothness and of light weight.
摘要翻译：许多类型的天线包括与电介质膜或片间隔开的接地平面，其通过诸如平板天线（也称为分层天线）的电介质间隔件支撑包括印刷贴片辐射元件的微带图案。对于现代电信应用，需要考虑各种因素，例如尺寸，重量，成本和易于构造的天线。在高频下，例如高于100MHz时，电路损耗随着频率的增加而增加，尤其是介质间距。本发明提供一种厚度小于3mm的天线电介质，具有接近空气的相对电介质介电常数，从而使电路和传输线损耗最小化。根据本发明的另一方面，提供了一种天线接地平面基板，其包括通过两阶段成型工艺制造的发泡聚苯乙烯基板。将预发泡的珠粒引入到位于第一位置的两位置模具腔中，其尺寸被设计成能够均匀分布珠子; 减小通过模具的空气通过的空腔的尺寸，由此聚苯乙烯珠进一步膨胀; 将模具内的压力降低至部分真空度，由此聚苯乙烯冷却并呈现固体状态，并且除去蒸汽所引起的水分; 并从模具中取出基材并在干燥空气中在高于环境温度的温度下加热基材。两级聚苯乙烯涂覆导电涂层，以提供均匀平滑度和重量轻的导电表面。

90. 发明申请

WO1997046938A1 MULTIPLE ALGORITHM PROCESSING ON A PLURALITY OF DIGITAL SIGNAL STREAMS VIA CONTEXT SWITCHING 审中-公开
标题翻译：通过上下文切换对多个数字信号流进行多种算法处理
公开(公告)号：WO1997046938A1
公开(公告)日：1997-12-11
申请号：PCT/CA1997000309
申请日：1997-05-07
申请人： NORTHERN TELECOM LIMITED
发明人： NORTHERN TELECOM LIMITED , COADY, Alan, Charles , PILLAR, John, Frank , LOEWEN, Jonathan, David
IPC分类号： G06F09/46
CPC分类号： G06F9/462
摘要： A technique of processing multiple digital signal streams uses one instantiation of an algorithm with memory storage of the next state, to facilitate context switching. In one embodiment, the invention is applied to framing and mapping techniques, resulting in a low circuit count for implementation with excellent performance, when measured with the commonly accepted criteria.
摘要翻译：处理多个数字信号流的技术使用具有下一状态的存储器存储的算法的一个实例化，以便于上下文切换。在一个实施例中，当以普遍接受的标准进行测量时，本发明应用于成帧和映射技术，导致具有优异性能的实现的低电路计数。

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