公开(公告)号：US5719874A

公开(公告)日：1998-02-17

申请号：US547708

申请日：1995-10-19

申请人： Rolf Heidemann ,  Heinz Krimmel ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Heinz Krimmel ,  Jurgen Otterbach

IPC分类号： H04J3/16 ,  H04J14/08

CPC分类号： H04J3/1647 ,  H04J3/1694 ,  H04J14/08

摘要： In known optical distribution systems, a signal intended for the subscribers is distributed from a transmitting point to all network terminations (point-to-multipoint transmission). The receivers, which are connected to a passive optical network, are adapted to a common bit rate. If a need for a higher data rate arises at a network termination, this need can only be satisfied in the prior art by converting all receivers. This is not possible without interrupting the service. Furthermore, the conversion entails great expense, since the receivers of these network terminations where the need for information is unchanged have to be converted as well. By a time-division-multiplexing method, a time-division multiplex signal is generated which has a frame whose duration is equal to one bit period (T) of a digital signal, and which is divided into k time slots (ZS). At least two time slots (ZS) are used for one digital signal, and one respective time slot (ZS) is used for each of the remaining digital signals.

摘要翻译： 在已知的光分配系统中，用于用户的信号从发射点分发到所有网络终端（点到多点传输）。 连接到无源光网络的接收机适用于公共比特率。 如果在网络终止时需要较高的数据速率，则只需在现有技术中通过转换所有接收机来满足这一需求。 这不可能不中断服务。 此外，转换需要很大的费用，因为这些网络终端的接收者在信息需求不变的情况下也必须被转换。 通过时分多路复用方法，产生时间复用信号，该时分复用信号的持续时间等于数字信号的一个比特周期（T），并被划分为k个时隙（ZS）。 对于一个数字信号使用至少两个时隙（ZS），并且对于每个剩余的数字信号使用一个相应的时隙（ZS）。

公开(公告)号：US5412746A

公开(公告)日：1995-05-02

申请号：US216187

申请日：1994-03-22

申请人： Rolf Rossberg ,  Rainer Fritschi ,  Jurgen Otterbach ,  Rolf Heidemann

发明人： Rolf Rossberg ,  Rainer Fritschi ,  Jurgen Otterbach ,  Rolf Heidemann

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/42 ,  G02B6/00 ,  G02B6/36

CPC分类号： G02B6/29332 ,  G02B6/2821 ,  G02B6/4204 ,  G02B6/4286 ,  G02B6/4287

摘要： A coupler (1) made of optical fibers is provided with a device for detecting the light that is carried in one of the fibers at the coupler output in operation. For that purpose, the coupler (1) embedded in an enclosure (2) has at the coupler output a lens body (8) enclosing the optical fiber (pigtail 6) and a detector (9) aimed at the lens body (8). With the detector, during coupler operation, lost light dissipated via the primary coating of the optical fiber is received by the lens body (8 ) and carried by the detector (9) to an electrical evaluator.

摘要翻译： 由光纤制成的耦合器（1）设置有用于检测在操作中耦合器输出处的光纤之一中承载的光的装置。 为此，嵌入在外壳（2）中的耦合器（1）在耦合器输出处具有围绕光纤（尾纤6）的透镜主体（8）和瞄准透镜体（8）的检测器（9）。 利用检测器，在耦合器操作期间，通过光纤的初级涂层消散的损失的光被透镜体（8）接收并由检测器（9）承载到电子评估器。

公开(公告)号：US5748348A

公开(公告)日：1998-05-05

申请号：US554272

申请日：1995-11-06

申请人： Rolf Heidemann ,  Gustav Veith ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Gustav Veith ,  Jurgen Otterbach

IPC分类号： H04B10/02 ,  H04H20/69 ,  H04J14/02 ,  H04J14/08 ,  H04N7/22

CPC分类号： H04H20/69 ,  H04J14/0298 ,  H04N7/22

摘要： In an optical communication system in which cable-television signals and subscriber-assigned tele-communication signals are transmitted over a passive optical network (4, 5) to at least one optical network termination (6), each optical network termination (6) requires two optical-to-electrical transducers. An optical network termination (6) is disclosed which requires only one optical-to-electrical transducer (24). The system has two transmitting devices (1, 2) which each transmit a respective optical signal (O.sub.TV, O.sub.D). In the second transmitting device (2), a second electric signal (S.sub.D), whose energy occupies a second frequency band (FB2), is processed in such a way that the energy is concentrated in a subband lying outside the first frequency band (FB1) of a first electric signal (S.sub.TV). The optical-to-electrical transducer (24) in the optical network termination (6) converts the received optical signals (O.sub.TV, O.sub.D) to an electric multiplex signal (E.sub.MUX), from which the two electric signals (S.sub.TV, S.sub.D) are recovered.

摘要翻译： 在其中有线电视信号和用户分配的电信号通过无源光网络（4,5）发射到至少一个光网络终端（6）的光通信系统中，每个光网络终端（6）需要 两个光电转换器。 公开了一种仅需要一个光电转换器（24）的光网络终端（6）。 该系统具有两个发送设备（1,2），每个发送设备发送相应的光信号（OTV，OD）。 在第二发送装置（2）中，能量占用第二频带（FB2）的第二电信号（SD）以能量集中在位于第一频带外的子带（FB1 ）第一电信号（STV）。 光网络终端（6）中的光电转换器（24）将所接收的光信号（OTV，OD）转换为电复用信号（EMUX），从其中恢复两个电信号（STV，SD） 。

公开(公告)号：US5550667A

公开(公告)日：1996-08-27

申请号：US108325

申请日：1993-08-18

申请人： Heinz Krimmel ,  Henning Bulow ,  Rolf Heidemann ,  Jurgen Otterbach

发明人： Heinz Krimmel ,  Henning Bulow ,  Rolf Heidemann ,  Jurgen Otterbach

IPC分类号： H04B10/2537 ,  H04B10/04

CPC分类号： H04B10/2537

摘要： A laser (2) of an optical transmitter (1) for the transmission of an analog broadband signal for CATV in particular, can be amplitude-modulated in two different manners with an intelligence signal (N). Direct modulation can lead to an undesired additional frequency modulation. With indirect modulation by means of an optical intensity modulator (3), Brillouin scattering occurs at powers of approximately 10 mW in an optical fiber of the transmission path connected to the optical transmitter (1). Both modulations lead to distortions of the transmitted signal. In order to avoid the disadvantages of both modulations in a technically simple fashion, the carrier emitted from a laser (2) is indirectly modulated with an intelligence signal (N) and the laser (2) also faintly directly modulated with an energy-dispersing signal (V). The faint direct modulation leads to a constant, limited wave length alteration of the optical signal, such that Brillouin scattering is reduced, simultaneously with the avoidance of dispersion distortions.

摘要翻译： 用于传输CATV的模拟宽带信号的光发射机（1）的激光器（2）可以用智能信号（N）以两种不同的方式进行幅度调制。 直接调制可能导致不需要的附加频率调制。 通过利用光强度调制器（3）的间接调制，在连接到光发送器（1）的传输路径的光纤中，约为10mW的功率发生布里渊散射。 两种调制都会导致发送信号的失真。 为了避免技术上简单的两种调制的缺点，从激光器（2）发射的载体用智能信号（N）间接调制，激光器（2）也用能量分散信号微弱地直接调制 （V）。 微弱的直接调制导致光信号的恒定的有限波长变化，使得布里渊散射减小，同时避免色散失真。

公开(公告)号：US5297154A

公开(公告)日：1994-03-22

申请号：US56305

申请日：1993-04-30

申请人： Rolf Heidemann ,  Jurgen Otterbach

发明人： Rolf Heidemann ,  Jurgen Otterbach

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/094 ,  H01S3/10 ,  H01S5/062 ,  H01S3/30 ,  G02B6/26 ,  H01S3/00

CPC分类号： H01S3/094003 ,  H01S5/06209 ,  H01S3/094011 ,  H01S3/094069 ,  H01S5/0652

摘要： Prior art fiber-optic amplifiers which are used in a fiber-optic link to amplify the light signals to be transmitted have the disadvantage that the semiconductor lasers employed as pump lasers are highly sensitive to feedback, so that the stability of the light-signal transmission is impaired by pump light reflected back into the pump lasers.According to the invention, the operating current for such pump lasers (4) contains a noise current, so that the pump laser emits its pump light in many modes, which makes it insensitive to feedback.To prevent the noise component of the pump light which is caused by the noise current from affecting the amplification of the light signals to be transmitted, the noise current is filtered in such a way that its spectral components have frequencies which lie above the reciprocal lifetime of that energy level of the active laser medium which causes the amplification of the light signals.

摘要翻译： 在光纤链路中用于放大要发射的光信号的现有技术的光纤放大器具有作为泵浦激光器使用的半导体激光器对反馈高度敏感的缺点，因此光信号传输的稳定性 被反射回泵浦激光器的泵浦光损伤。 根据本发明，这种泵浦激光器（4）的工作电流包含噪声电流，使得泵激光器以许多模式发射其泵浦光，这使其对反馈不敏感。 为了防止由噪声电流引起的泵浦光的噪声分量影响要传输的光信号的放大，噪声电流被滤波，使得其频谱分量的频率高于 导致放大光信号的有源激光介质的能级。

公开(公告)号：US20090209207A1

公开(公告)日：2009-08-20

申请号：US12372790

申请日：2009-02-18

申请人： Hardy Halbauer ,  Jurgen Otterbach

发明人： Hardy Halbauer ,  Jurgen Otterbach

IPC分类号： H04B15/00 ,  H04B17/00

CPC分类号： H04W64/00 ,  H04L5/0023 ,  H04L5/006 ,  H04L27/261 ,  H04W16/02 ,  H04W52/243 ,  H04W52/42

摘要： The invention relates to a multicarrier mobile device comprising a receiver (101) for receiving a first multicarrier signal being associated with a first communication cell and a second multicarrier signal being associated with a second communication cell, an extractor (103) for extracting a first signal portion from the first multicarrier signal and for extracting a second signal portion from the second multicarrier signal and a processor (105) for determining a first interference power on the first signal portion and the second interference power on the second signal portion.

摘要翻译： 本发明涉及一种多载波移动设备，包括：接收机（101），用于接收与第一通信小区相关联的第一多载波信号和与第二通信小区相关联的第二多载波信号;提取器（103），用于提取第一信号 并且用于从第二多载波信号中提取第二信号部分;以及处理器（105），用于确定第一信号部分上的第一干扰功率和第二信号部分上的第二干扰功率。

公开(公告)号：US07907588B2

公开(公告)日：2011-03-15

申请号：US11679139

申请日：2007-02-26

申请人： Joerg Schaepperle ,  Jurgen Otterbach

发明人： Joerg Schaepperle ,  Jurgen Otterbach

IPC分类号： H04B7/208

CPC分类号： H04L5/0032 ,  H04L5/0007 ,  H04L5/0046 ,  H04L27/2618

摘要： The invention relates to a method of reducing a peak to average power ratio of a signal, wherein the signal comprises data that is designated for transmission to a sector of a plurality of sectors, and wherein the method comprises the steps of selecting a first subset of radio resources from a given set of radio resources and of assigning a subset of radio resources from the remaining set of radio resource to each sector of said plurality of sectors. Each subset of radio resources is at least approximately disjoint from another subset of radio resources. The method in accordance with the invention further comprises the step of generating the signal by combining the data on the subset of radio resources that has been assigned previously to the sector and by employing said first subset of radio resources for a reduction of the peak to average power ratio. In another aspect the invention relates to a communication network component, to a computer program product and to a wireless communication system.

摘要翻译： 本发明涉及一种降低信号的峰均功率比的方法，其中信号包括被指定用于传输到多个扇区的扇区的数据，并且其中该方法包括以下步骤：选择第 从给定的一组无线电资源获得无线电资源，并将无线电资源的子集从剩余的无线电资源集分配给所述多个扇区的每个扇区。 无线电资源的每个子集至少与无线电资源的另一子集大致不相交。 根据本发明的方法还包括通过将先前已经分配给扇区的无线电资源的子集上的数据组合并通过采用所述无线电资源的第一子集来减少峰值到平均值来生成信号的步骤 功率比。 在另一方面，本发明涉及通信网络组件，计算机程序产品和无线通信系统。

公开(公告)号：US5442479A

公开(公告)日：1995-08-15

申请号：US264961

申请日：1994-06-24

申请人： Henning Bulow ,  Jurgen Otterbach

发明人： Henning Bulow ,  Jurgen Otterbach

IPC分类号： G02F1/35 ,  G01M11/00 ,  H01S3/067 ,  H04B10/00 ,  H04B10/02 ,  H04B10/079 ,  H04B10/08 ,  H04B10/17 ,  H04B10/291

CPC分类号： H04B10/291 ,  H01S3/06754 ,  H04B10/07955 ,  H04B10/0797 ,  H01S2301/02 ,  H04B2210/08

摘要： In fiber-optic amplifiers, various parameters, such as the input power, are measured to obtain information on the operating condition of the transmission link and of the fiber-optic amplifier itself. In prior art fiber-optic amplifiers, a portion of the input power is coupled out for this purpose by means of a coupler (2). If low-power optical signals such as digital signals are transmitted, the coupled-out portion of the input power can only be detected with complicated and costly circuitry. In the novel fiber-optic amplifier, the pump power and input power are monitored by coupling out and evaluating the radiation resulting from amplified spontaneous emission (ASE). This provides information on the state of the input signal.

摘要翻译： 在光纤放大器中，测量诸如输入功率的各种参数以获得关于传输链路和光纤放大器本身的操作条件的信息。 在现有技术的光纤放大器中，输入功率的一部分通过耦合器（2）耦合到该目的。 如果发射诸如数字信号的低功率光信号，则只能用复杂和昂贵的电路检测输入功率的耦合输出部分。 在新型光纤放大器中，泵浦功率和输入功率通过耦合输出和评估由放大的自发发射（ASE）产生的辐射来监测。 这提供了有关输入信号状态的信息。

公开(公告)号：US20070177684A1

公开(公告)日：2007-08-02

申请号：US11637049

申请日：2006-12-12

申请人： Hardy Halbauer ,  Erhard Sailer ,  Jurgen Otterbach

发明人： Hardy Halbauer ,  Erhard Sailer ,  Jurgen Otterbach

IPC分类号： H04K1/10

CPC分类号： H04L27/2675 ,  H04L27/2665

摘要： A method for detecting symbol timing in an OFDMA system is described, wherein a sub-channel comprises several groups (1) of sub carriers (2) spread over the frequency band, each group (1) of sub carriers (2) comprising at least one pilot carrier (4), said method comprising the steps of: correcting the received pilot sub carriers (4) with a set of different time shifts, calculating the standard deviation of the corrected pilot sub carriers (4) for each time shift, selecting the time shift showing the minimum standard deviation, and applying said time shift to received data sub carriers (5) on said sub-channel. Furthermore a OFDMA base station to be used to execute the method mentioned above, plus a computer program product causing a computer to perform said method is described.

摘要翻译： 描述了一种用于在OFDMA系统中检测符号定时的方法，其中子信道包括在频带上扩展的多个子载波组（2），每个子载波组（1）至少包括 一个导频载波（4），所述方法包括步骤：用一组不同的时移校正接收的导频子载波（4），计算每个时移的校正导频子载波（4）的标准偏差，选择 所述时移显示最小标准偏差，并将所述时移应用于所述子信道上的接收数据子载波（5）。 此外，描述了用于执行上述方法的OFDMA基站以及导致计算机执行所述方法的计算机程序产品。

公开(公告)号：US20050273855A1

公开(公告)日：2005-12-08

申请号：US11111761

申请日：2005-04-22

申请人： Karsten Oberle ,  Marco Tomsu ,  Peter Domschitz ,  Jurgen Otterbach

发明人： Karsten Oberle ,  Marco Tomsu ,  Peter Domschitz ,  Jurgen Otterbach

IPC分类号： H04L9/00 ,  H04L12/24 ,  H04L29/06

CPC分类号： H04L63/0263 ,  H04L63/0209 ,  H04L63/1441

摘要： The invention refers to a method for preventing attacks on a network server within a call-based-services-environment, preferably a VoIP-environment. The environment comprises a network, the network server connected to the network, a number of user agents connected to the network and means for restricting access to the network server from the network. The call server comprises an attack-detection device for detecting and identifying attacks from the network on the network server. In order to allow fast and reliable protection of the network server against attacks it is suggested that characteristic parameters of the attacks identified are entered into a black-list, the content of the black-list is transmitted via a feedback-path to an attack-prevention-device for controlling the access restricting means, the attack-prevention-device inspects and analyzes traffic directed from the network to the network server and controls the access restricting means.

摘要翻译： 本发明涉及一种用于防止在基于呼叫的服务环境（优选为VoIP环境）内对网络服务器的攻击的方法。 环境包括网络，连接到网络的网络服务器，连接到网络的多个用户代理以及用于限制从网络访问网络服务器的装置。 呼叫服务器包括用于检测和识别来自网络服务器上的网络的攻击的攻击检测设备。 为了能够快速可靠地保护网络服务器免受攻击，建议将所识别攻击的特征参数输入黑名单，将黑名单的内容通过反馈路径发送给攻击者， 用于控制访问限制装置的预防装置，防攻击装置检查并分析从网络指向网络服务器的流量并控制访问限制装置。