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公开(公告)号：EP0485100A3
公开(公告)日：1993-01-20
申请号：EP91309978.4
申请日：1991-10-29
CPC分类号： H01S3/302
摘要： A practical fibre Raman amplifier for soliton systems which employs conventional transmission fibre (4) and a pulsed pump source (3). The pump source only requires a relatively low mean power level but must be capable of providing sufficiently high peak output power pulses at intervals corresponding to the intervals between solitons whereby to amplify the latter. A conventional mode-locked laser diode source can achieve this at the requisite wavelength. The use of such a pulsed pump source is possible since the solitons have to be spaced at intervals approximately 8 to 10 times their pulse width in order to avoid interaction problems. Conventionally, Raman amplification requires high mean power continuous wave pump sources and suitable laser diode sources are not available at the requisite wavelengths.
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公开(公告)号：EP0398183A3
公开(公告)日：1992-12-23
申请号：EP90108926.8
申请日：1990-05-11
发明人： Lewis, Harry Edward , Ritenour, Gibson Dale , Wong, Cho Lun , Gara, George , Eddisford, Allen Foster
CPC分类号： H04Q3/62 , H04Q3/0016 , H04Q3/002 , H04Q2213/13103 , H04Q2213/13176 , H04Q2213/1322 , H04Q2213/13353 , H04Q2213/13384 , H04Q2213/13396
摘要： The present invention provides a method of establishing carrier independent network services (CINS) wherein feature and voice information are decoupled such that feature information is transmitted on a signalling line (13) established on private and/or public facilities, but voice information is transmitted over a public network (12) when calls overflow, thereby permitting the terminating node (11) to identify the incoming call and associate feature information provided by the originating node (10).
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公开(公告)号：EP0518518A1
公开(公告)日：1992-12-16
申请号：EP92304740.1
申请日：1992-05-26
IPC分类号： G02B6/44
CPC分类号： G02B6/442
摘要： A voltage stress protection device (Fig. 1) for a dielectric aerial cable mounted on an electric power line comprises a bell-shaped conductive member (13) coupled to the cable support armour (12) and adapted to confine corona discharge to a region remote from the surface of the cable (11).
摘要翻译： 用于安装在电力线上的电介质架空电缆的电压应力保护装置（图1）包括一个与电缆支撑装甲（12）连接的钟形导电构件（13），并适于将电晕放电限制在远程区域 从电缆（11）的表面。
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公开(公告)号：EP0517417A2
公开(公告)日：1992-12-09
申请号：EP92304753.4
申请日：1992-05-27
IPC分类号： G02B6/44
CPC分类号： G02B6/4427 , G02B6/4428 , G02B6/4446
摘要： A cable joint or termination has a plastics insulating layer formed by a pair of pre-formed polyethelene parts 7 and 8 which are a close fit around the casing 3 and the cable insulations 1C, 2C. The parts are bonded by ring moulds 9, 10 and 11. This is quicker and cheaper than previous techniques of injection moulding to a sleeve and the cable at the end regions of the casing, and prevents occlusion caused by cable outgassing.
摘要翻译： 电缆接头或端子具有由一对预先形成的聚乙烯部分7和8形成的塑料绝缘层，它们围绕壳体3和电缆绝缘体1C，2C紧密配合。 这些部件通过环模9,10和11粘合。这比之前注射成型到套筒的技术和在壳体的端部区域处的电缆更加便宜，并且防止由电缆脱气引起的堵塞。
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公开(公告)号：EP0513002A1
公开(公告)日：1992-11-19
申请号：EP90917395.0
申请日：1990-11-30
IPC分类号： H01S5
CPC分类号： H01S5/06832
摘要： Un circuit de commande de diode à laser assure une puissance de sortie moyenne voulue de la diode à laser (10) en détectant (18) la sortie optique, en amplifiant (24) la sortie détectée et en commandant de manière appropriée le courant de polarisation (14) de la diode à laser. Un signal pilote (20) est associé à la sortie détectée (18) et amplifié avec celle-ci, et le niveau amplifié (24) du signal est détecté (22) et utilisé pour commander (26) un courant de modulation (16) pour la diode à laser. Dans un des agencements décrits la diode à laser (10) est commandée de manière à posséder un rapport élevé d'extinction lorsque le courant de polarisation est situé au coude (42) de la courbe caractéristique de la diode, et dans un autre agencement, un rapport d'extinction inférieur est obtenu lorsque le courant de polarisation est situé au-dessus du coude (42).
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公开(公告)号：EP0246737B1
公开(公告)日：1992-11-11
申请号：EP87302418.6
申请日：1987-03-20
发明人： Bricheno, Terry
IPC分类号： G02B6/28
CPC分类号： G02B6/2843 , G02B6/2835
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公开(公告)号：EP0271993B1
公开(公告)日：1992-09-16
申请号：EP87309979.0
申请日：1987-11-11
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公开(公告)号：EP0440392A3
公开(公告)日：1992-07-15
申请号：EP91300619.3
申请日：1991-01-28
IPC分类号： G02F1/137 , G02F1/1337
CPC分类号： G02F1/1416 , G02F1/133734
摘要： Relaxation effects of a uniform mode ferroelectric liquid crystal cell with obliquely evaporated alignment layers, characterised by the reduction in apparent tilt angle consequent upon removal of a switching stimulus, are eliminated by a poling treatment that typically comprises the application of a relatively low frequency (c. 500Hz) relatively large amplitude (c. 60 volts peak-to-peak) electric potential difference across the thickness of the liquid crystal layer.
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公开(公告)号：EP0492869A2
公开(公告)日：1992-07-01
申请号：EP91311388.2
申请日：1991-12-06
发明人： Mayo, Richard Hamond , Tipper, Alan
IPC分类号： H04L7/033
CPC分类号： H04L7/033
摘要： A digital signal data retiming and clock extraction apparatus including a series of three data latches (111, 121, 131), connected in cascade, means for applying digital data signals to the first latch, means for clocking (701) the first and third latches in phase with the data signals input to the first latch, means for clocking the second latch in antiphase with the data signals input to the first latch, coincidence detection means (201) to which are applied the digital data signal (A) input to the first latch, the data signals output (B) of the second latch and the data signals output (C) of the third latch, the coincidence detection means being arranged to derive output data signals (X) in accordance with the algorithm X = B. (A-C), and a first phase lock loop feedback means (Q1, Q2, 301) whereby the output data signals (X) of the coincidence detection circuit control the timing of the clocking means to maintain the phase relationship with the digital data signals input to the first latch.
摘要翻译： 一种数字信号数据重定时和时钟提取装置，包括串联连接的一系列三个数据锁存器（111,121,131），用于将数字数据信号施加到第一锁存器的装置，用于对第一和第三锁存器 与输入到第一锁存器的数据信号同相，用于与输入到第一锁存器的数据信号相反地对第二锁存器进行计时的装置，将输入到第一锁存器的数字数据信号（A）施加到其上的符合检测装置（201） 第一锁存器，第二锁存器的数据信号输出（B）和第三锁存器的数据信号输出（C），重合检测装置被安排成根据算法X = B导出输出数据信号（X）。 （AC）和第一锁相环反馈装置（Q1，Q2,301），由此一致检测电路的输出数据信号（X）控制时钟装置的定时，以保持与数字数据信号输入的相位关系 到第一 锁存器。
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180.发明公开Improved inter-cell call hand-over in radio communication systems with dynamic channel allocation 失效改善与动态信道分配的无线通信系统的细胞之间的呼叫的越区切换。
公开(公告)号：EP0492800A2
公开(公告)日：1992-07-01
申请号：EP91310786.8
申请日：1991-11-22
CPC分类号： H04W36/0072 , H04W24/10 , H04W36/06 , H04W36/08 , H04W72/02 , H04W72/04 , H04W72/082 , H04W72/085 , H04W92/20
摘要： The call hand-over technique of this invention is characterized by the use of channel information from both the target base station (24b) and subscriber terminal (22) in determining which radio traffic channel will be used to hand over a call in progress from a serving base station (24a) to a target base station (24b). Calls are handed over to the radio channel which, of a set of channels under consideration by the subscriber terminal (22), contains the least amount of interference as measured by the subscriber terminal. The set of channels under consideration by the subscriber terminal is a subset of the entire set of channels allocated to the service. This subset is comprised of those channels having little interference, as measured by the target base station. The hand-over technique thereby assures that calls proceed on channels containing little interference from the viewpoints of both the target base station (24b) and the subscriber terminal (22).
摘要翻译： 本发明的呼叫移交技术是通过使用的信道信息从双方的目标基站（24b）和哪个无线电业务信道将被用于移交的呼叫正在进行从确定性采矿用户终端（22），其特征 服务基站（24A）向目标基站（24B）。 呼叫移交给无线信道其中，一组由用户终端（22）所考虑信道的，含有干扰量最少的由用户终端作为测定。 该组由用户终端所考虑信道的是整个集合分配给服务信道的一个子集。 该子集是由具有小的干扰的那些信道，由目标基站所测量。 移交技术从而保证确实的呼叫继续进行从双方的目标基站（24b）和所述用户终端（22）的观点出发，含有比较少量的干扰信道。
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