公开(公告)号：US06320878B1

公开(公告)日：2001-11-20

申请号：US08971971

申请日：1997-11-17

申请人： Heinz Krimmel ,  Rainer Fritschi ,  Rolf Heidemann

发明人： Heinz Krimmel ,  Rainer Fritschi ,  Rolf Heidemann

IPC分类号： H04J102

CPC分类号： H04N7/22 ,  H04N7/17309

摘要： In a hybrid fiber/coax access network (NET) with downstream and upstream channels, the upstream channel serves to transmit voice and video signals as well as data signals from groups of customer locations (END) to a subcenter (HUB). A demarcation point (UP) provides the interface between the access network (NET) and the private network of the customer location (END). It contains at least two devices (BP4, BP5, BP6) for frequency-splitting received signals in the upstream frequency band, at least two switches (S4, S5, S6) following the at least two devices (BP4, BP5, BP6) and serving to block or unblock individual upstream frequency ranges, a measuring unit (MESS2) for measuring the amplitudes or intensities of the signals in the split frequency ranges, and a control unit (CTRL) for evaluating the measured values and controlling the at least two switches (S4, S5, S6). For a customer location (END), individual upstream frequency ranges can thus be telemetrically blocked for a limited time. Decentralized and autonomous monitoring of individual upstream frequency ranges is accomplished by a measuring unit which is controlled by the demarcation point (UP) itself.

摘要翻译： 在具有下行和上行信道的混合光纤/同轴电缆接入网络（NET）中，上行信道用于将语音和视频信号以及从客户位置组（END）的数据信号传输到子中心（HUB）。 分界点（UP）提供访问网络（NET）和客户位置（END）的专用网络之间的接口。 它包含用于在上行频带中分频接收信号的至少两个装置（BP4，BP5，BP6），至少两个装置（BP4，BP5，BP6）之后的至少两个开关（S4，S5，S6）和 用于阻断或解除单个上游频率范围的测量单元（MESS2），用于测量分离频率范围内的信号的幅度或强度的测量单元（MESS2），以及用于评估测量值并控制至少两个开关的控制单元（CTRL） （S4，S5，S6）。 对于客户位置（END），单个上游频率范围可以在有限的时间内被遥测。 单独的上行频率范围的分散和自主监控由测量单元完成，该测量单元由分界点（UP）本身控制。

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：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：US5471342A

公开(公告)日：1995-11-28

申请号：US219990

申请日：1994-03-30

申请人： Bernhard Junginger ,  Rainer Fritschi ,  Heinz Krimmel

发明人： Bernhard Junginger ,  Rainer Fritschi ,  Heinz Krimmel

IPC分类号： H01S3/067 ,  H04B10/07 ,  H04B10/291 ,  H01S3/094 ,  H01S3/17

CPC分类号： H04B10/07 ,  H01S3/06754 ,  H04B10/291 ,  H04B10/2912

摘要： In a fiber-optic amplifier, which consists of at least one pump coupler (2) with a pumping light source (1) and an erbium-doped fiber length (7) which is spliced to the pump coupler (2), at least one detector is located in the splice area (12) between the fiber length (7) and the outgoing transmission line, to monitor the amplifier by measuring the scattered light coming from this splice area (12). An electrical evaluating device follows the detector.

摘要翻译： 在由具有泵浦光源（1）的至少一个泵耦合器（2）和与泵耦合器（2）接合的掺铒光纤长度（7）组成的光纤放大器中，至少一个 检测器位于光纤长度（7）和出射传输线之间的接合区域（12）中，通过测量来自该接合区域（12）的散射光来监测放大器。 电气评估装置跟随检测器。

公开(公告)号：US06310706B1

公开(公告)日：2001-10-30

申请号：US09325458

申请日：1999-06-03

申请人： Rolf Heidemann ,  Heinz Krimmel

发明人： Rolf Heidemann ,  Heinz Krimmel

IPC分类号： H04B1000

CPC分类号： H04J13/0022 ,  H04B1/69 ,  H04J13/004 ,  H04J13/10 ,  H04N7/17309 ,  H04N21/6118 ,  H04N21/6168

摘要： Stationary interference signals from radio stations, for example, enter a transmission network (NET), e.g., a coaxial cable network with return channel, and impair the transmission of broadband signals, e.g., data, in the upstream frequency band, since they lie in the same frequency range. The tranmitting/receiving unit (SE1) of a terminal (END) contains a receiving unit (EMP1) for receiving frequency values of stationary interference signals induced in the transmission link, a memory (MEMO1) for storing the received frequency values, a generator (SG1, NG1) for generating a spreading function with spectral zeros at frequency values which are determined from the stored frequency values, and a multiplier (MUL1) for multiplying the broadband signals to be transmitted by the generated spreading function with spectral zeros. The spectral zeros are so generated that, if the spreading function with the spectral zeros is multiplied by the individual interference signals, at least one of the spectral zeros is located in the frequency range of the broadband signals, so that when the broadband signals are despread at a center (ZE), the impairment caused by the interference signals is reduced.

摘要翻译： 例如，来自无线电台的固定干扰信号进入传输网络（NET），例如具有返回信道的同轴电缆网络，并且损害上游频带中宽带信号（例如数据）的传输，因为它们位于 频率范围相同。 终端（END）的发送/接收单元（SE1）包含用于接收在传输链路中感应到的静止干扰信号的频率值的接收单元（EMP1），用于存储所接收的频率值的存储器（MEMO1） SG1，NG1），用于根据从所存储的频率值确定的频率值产生具有频谱零点的扩展函数;以及乘法器（MUL1），用于将由所生成的扩展函数发送的宽带信号乘以频谱零。 光谱零被如此生成，如果具有频谱零的扩展函数与各个干扰信号相乘，则至少有一个频谱零位于宽带信号的频率范围内，使得当宽带信号被解扩时 在中心（ZE），由干扰信号引起的损害减少。

公开(公告)号：US6078950A

公开(公告)日：2000-06-20

申请号：US699988

申请日：1996-08-20

申请人： Rolf Heidemann ,  Heinz Krimmel

发明人： Rolf Heidemann ,  Heinz Krimmel

IPC分类号： H04B3/50 ,  H04H20/38 ,  H04H20/76 ,  H04H20/78 ,  H04H60/97 ,  H04L12/28 ,  H04N7/10 ,  H04N7/173 ,  H04N7/14 ,  H04L12/413 ,  H04N1/02

CPC分类号： H04H20/38 ,  H04H20/78 ,  H04H60/97 ,  H04N7/10 ,  H04N7/102 ,  H04N7/17309

摘要： An electrical transmission system is indicated, in which a broadband distribution network (2) has a center (1) and a number of terminals (26) connected thereto, which can receive TV and Audio signals emitted by the center (1), and individual subscriber signals, and which can send upstream signals to the center (1). The broadband distribution network (2) has a number of amplifiers (10) that are close to the subscribers, to which a group of terminals (26) is connected, each of which is connected to a back-channel facility (4). The back-channel facility (4) is connected to a two-wire line (21) which is indirectly connected to the center (1). The back-channel facility (4) evaluates the upstream signals sent by a group of terminals (26).

摘要翻译： 指示了一种电传输系统，其中宽带分配网络（2）具有连接到其的中心（1）和多个终端（26），其可以接收由中心（1）发射的电视和音频信号，以及个体 用户信号，并且可以向中心（1）发送上行信号。 宽带分配网络（2）具有靠近用户的多个放大器（10），一组终端（26）被连接到其上，每个终端连接到后向通道设施（4）。 后通道设备（4）连接到间接连接到中心（1）的双线线路（21）。 后通道设施（4）评估由一组终端（26）发送的上行信号。

公开(公告)号：US5302922A

公开(公告)日：1994-04-12

申请号：US905836

申请日：1992-06-29

申请人： Rolf Heidemann ,  Heinz Krimmel ,  Bernhard Junginger

发明人： Rolf Heidemann ,  Heinz Krimmel ,  Bernhard Junginger

IPC分类号： H04B3/14 ,  H03H7/01 ,  H03H7/075 ,  H04B10/2513 ,  H03H7/03

CPC分类号： H04B10/25137

摘要： To compensate for nonlinear distortions in analog optical communication transmission systems, caused by laser chirps and the chromatic dispersion of the optical fiber, an equalizer in the form of an LC component is known, whose capacitance is formed by a variable capacitance diode. If this equalizer is to be adjusted for considerable signal distortions (long transmission path length), it must operate at great capacitance, which reduces its bandwidth. In order to be able to equalize large bandwidth signals (e.g. 600 MHz) containing considerable distortions, the invention indicates an LC chain circuit with LC components of the known type, as the equalizer. Further developments of this solution concern the appropriate polarizing of the variable capacitance diode and maintaining the frequency response constant, when adjusting the equalization.

摘要翻译： 为了补偿由激光啁啾引起的模拟光通信传输系统中的非线性失真以及光纤的色散，已知以LC分量形式的均衡器，其电容由可变电容二极管形成。 如果要对相当大的信号失真（长传输路径长度）调整该均衡器，则必须以较大的电容工作，从而降低其带宽。 为了能够均衡包含相当大失真的大带宽信号（例如600MHz），本发明指出具有已知类型的LC分量的LC链电路作为均衡器。 当调整均衡时，该解决方案的进一步发展涉及可变电容二极管的适当极化并保持频率响应恒定。

公开(公告)号：US5162937A

公开(公告)日：1992-11-10

申请号：US641187

申请日：1991-01-15

申请人： Rolf Heidemann ,  Heinz Krimmel

发明人： Rolf Heidemann ,  Heinz Krimmel

IPC分类号： H04J14/00 ,  H04J14/02 ,  H04N7/08 ,  H04N7/081 ,  H04N7/10

CPC分类号： H04J14/0298

摘要： The invention is based on the problem of transmitting a frequency-division multiplex signal occupying a board frequency band, e.g., the cable television frequency band of 47-440 MHz, over an optical waveguide transmission section. According to the invention, in the transmitting unit, the whole frequency band to be transmitted is divided into two sub-bands (FB.sub.1, FB.sub.2), and the lower sub-band (FB.sub.1) is converted by means of single-sideband amplitude modulation of a high-frequency carrier (f.sub.0) into a higher-frequency transmission frequency band, e.g. 497-688 MHz, which is less than one octave in width, based on its lowest frequency. The lower sub-band (FB.sub.1) and the transmission frequency band produced by the conversion are converted separately into optical signals with different wavelengths (.lambda..sub.1, .lambda..sub.2) and are transmitted in a wavelength multiplex procedure via the optical waveguide. Because of the limitation of less than one octave, second-order intermodulation products, which are usually formed during conversion into an optical signal, fall into unoccupied frequency regions. A corresponding reverse processing is carried out on the receiving side.

摘要翻译： 本发明是基于在光波导传输部分上发送占用板频率（例如47-440MHz的有线电视频带）的频分复用信号的问题。 根据本发明，在发送单元中，要发送的整个频带被划分为两个子带（FB1，FB2），并且通过单边带幅度调制将下个子带（FB1）转换成 将高频载波（f0）转换成更高频率的传输频带，例如， 基于其最低频率，其宽度小于一个八度宽度的497-688MHz。 通过转换产生的下部子带（FB1）和发送频带被分别转换为具有不同波长（λ1，λ2）的光信号，并经由光波导以波长多路复用方式发送。 由于少于一个八度的限制，通常在转换成光信号期间形成的二阶互调产物落入未被占用的频率区域。 在接收侧进行相应的反向处理。

公开(公告)号：US6026116A

公开(公告)日：2000-02-15

申请号：US979130

申请日：1997-11-26

申请人： Rolf Heidemann ,  Heinz Krimmel

发明人： Rolf Heidemann ,  Heinz Krimmel

IPC分类号： H04B10/04 ,  H04B1/69 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04J13/00 ,  H04J13/10 ,  H04N7/173 ,  H04N21/61 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04J13/0022 ,  H04B1/69 ,  H04J13/004 ,  H04J13/10 ,  H04N21/6118 ,  H04N21/6168 ,  H04N7/17309

摘要： Stationary interference signals from radio stations, for example, enter a transmission network (NET), e.g., a coaxial cable network with return channel, and impair the transmission of broadband signals, e.g., data, in the upstream frequency band, since they lie in the same frequency range. The transmitting/receiving unit (SE1) of a terminal (END) contains a receiving unit (EMP1) for receiving frequency values of stationary interference signals induced in the transmission link, a memory (MEMO1) for storing the received frequency values, a generator (SG1, NG1) for generating a spreading function with spectral zeros at frequency values which are determined from the stored frequency values, and a multiplier (MUL1) for multiplying the broadband signals to be transmitted by the generated spreading function with spectral zeros. The spectral zeros are so generated that, if the spreading function with the spectral zeros is multiplied by the interference signals, at least one of the spectral zeros is located in the frequency range of the broadband signals, so that when the broadband signals are despread at a center (ZE), the impairment caused by the interference signals is reduced.

摘要翻译： 例如，来自无线电台的固定干扰信号进入传输网络（NET），例如具有返回信道的同轴电缆网络，并且损害上游频带中宽带信号（例如数据）的传输，因为它们位于 频率范围相同。 终端（END）的发送/接收单元（SE1）包含接收单元（EMP1），用于接收在传输链路中感应到的静止干扰信号的频率值，存储器（MEMO1），用于存储所接收的频率值;发生器 SG1，NG1），用于根据从所存储的频率值确定的频率值产生具有频谱零点的扩展函数;以及乘法器（MUL1），用于将由所生成的扩展函数发送的宽带信号乘以频谱零。 光谱零是如此生成的，如果具有光谱零的扩展函数与干扰信号相乘，则光谱零中的至少一个位于宽带信号的频率范围内，使得当宽带信号在 一个中心（ZE），减少了由干扰信号引起的损害。

公开(公告)号：US5517232A

公开(公告)日：1996-05-14

申请号：US271521

申请日：1994-07-07

申请人： Rolf Heidemann ,  Heinz Krimmel

发明人： Rolf Heidemann ,  Heinz Krimmel

IPC分类号： H04J14/02 ,  H04N7/22

CPC分类号： H04N7/22 ,  H04J14/0232 ,  H04J14/0238 ,  H04J14/0247 ,  H04J14/0226 ,  H04J14/0282 ,  H04J14/0298

摘要： It is desirable to offer the subscribers of a cable television distribution network, in addition to the cable TV service, a video-on-demand service. Since, in the foreseeable future, the fiber-optic portion of the cable television distribution networks will not extend to the subscribers (111) but will terminate in optical network terminations (ONT.sub.i) from which a respective optical access network (108-110) will extend to the subscribers, the problem arises how to transmit the entirety of subscriber-assigned video signals to the subscribers so that the latter can receive the requested video signals. According to the invention, the transmission from the center (100) through the fiber-optic distribution network (101-107) to the optical network terminations (ONT.sub.i) is digital, using time- and wavelength-division multiplexing. In each optical network termination, only that portion of subscriber-assigned video signals is removed which is intended for subscribers connected to the optical network termination (ONT.sub.i). The removed subscriber-assigned video signals are modulated onto subcarriers (M.sub.1 -M.sub.6) and frequency-division-multiplexed with the cable TV signals which are distributed over the electrical access network (108-110) to the subscribers ( 111) connected to the optical network termination.

摘要翻译： 除了有线电视服务之外，还提供有线电视分配网络的用户，视频点播服务。 由于在可预见的将来，有线电视分配网络的光纤部分不会扩展到用户（111），而是终止于光网络终端（ONTi），相应的光接入网络（108-110）将从该终端 扩展到用户，出现的问题是如何将订户分配的视频信号的整体发送给用户，使得后者可以接收所请求的视频信号。 根据本发明，使用时间和波分复用，从中心（100）到光纤分配网络（101-107）到光网络终端（ONTi）的传输是数字的。 在每个光网络终端中，仅删除用户分配的视频信号的那部分，该视频信号用于连接到光网络终端（ONTi）的用户。 移除的用户分配的视频信号被调制到子载波（M1-M6）上，并与分布在电接入网络（108-110）上的有线电视信号频分复用到连接到光接收机的用户（111） 网络终止