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公开(公告)号：US09369213B1
公开(公告)日：2016-06-14
申请号：US14642187
申请日：2015-03-09
CPC分类号： H04B10/6166 , H04B10/614 , H04B10/6162 , H04L25/03197 , H04L25/03331 , H04L27/01 , H04L2025/03426
摘要： We disclose demultiplexing processing for an adaptive MIMO equalizer of a receiver of multiplexed communication signals implemented in a manner that significantly reduces the occurrence of singularities at the equalizer output without a significant concomitant increase in the required computational power. The receiver includes an equalizer controller that operates to dynamically track the degree of correlation of one or more pairs of equalized signals outputted by the MIMO equalizer and to use the tracking results to configure the MIMO equalizer in a manner that substantially prevents any two outputs of the MIMO equalizer from converging to the same state. In an example embodiment, the degree of correlation can be determined in a computationally efficient manner by identifying and comparing quadrants in which complex values produced at the different outputs of the MIMO equalizer are located over a plurality of time slots.
摘要翻译： 我们公开了多路复用通信信号的接收机的自适应MIMO均衡器的解复用处理，其以显着减少均衡器输出上的奇点出现的方式实现，而不需要显着伴随地增加所需的计算能力。 接收机包括均衡器控制器，其操作以动态地跟踪由MIMO均衡器输出的一对或多对均衡信号的相关程度，并且使用跟踪结果来配置MIMO均衡器，以便基本上防止任何两个输出 MIMO均衡器从收敛到相同状态。 在一个示例实施例中，可以通过识别和比较在其中在MIMO均衡器的不同输出处产生的复数值位于多个时隙上的象限的方法，以计算有效的方式来确定相关度。
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公开(公告)号：US20150381303A1
公开(公告)日：2015-12-31
申请号：US14315454
申请日：2014-06-26
发明人： Joseph K. Kakande
CPC分类号： H04J14/0212 , H04B10/27 , H04J14/021 , H04J14/028 , H04L27/3488 , H04L65/60 , H04Q11/0005 , H04Q2011/0039
摘要： A disclosed optical transport system is configured to use hierarchical modulation for better utilization of the available BER margin, e.g., to increase data-transport capacity per carrier wavelength in the system. For example, hierarchical modulation may be used to reduce the number of carrier wavelengths assigned to support a given volume of bidirectional data transport between a set of nodes in an optical backbone network. An embodiment of the disclosed optical transport system can advantageously be constructed by modifying a conventional WDM system, e.g., by adding configurable hierarchical-layer mappers at some of the nodes and modifying some of the ROADMs used therein to enable a drop-and-continue mode of operation.
摘要翻译： 所公开的光传输系统被配置为使用分级调制来更好地利用可用的BER余量，例如增加系统中每个载波波长的数据传输容量。 例如，可以使用分层调制来减少分配用于支持光骨干网络中的一组节点之间的给定量的双向数据传输的载波波数。 所公开的光传输系统的一个实施例可以有利地通过修改传统的WDM系统来构造，例如通过在一些节点处添加可配置的分级层映射器并且修改其中使用的一些ROADM以实现丢弃和继续模式 的操作。
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公开(公告)号：US09756407B2
公开(公告)日：2017-09-05
申请号：US14872825
申请日：2015-10-01
发明人： Joseph K. Kakande
IPC分类号： H04J14/00 , H04Q11/00 , H04L12/707 , H04L12/931
CPC分类号： H04Q11/0066 , H04L45/021 , H04L45/24 , H04L49/30 , H04L49/65 , H04Q11/0005 , H04Q2011/005 , H04Q2011/0054 , H04Q2011/0058 , H04Q2011/0073
摘要： A communication network that employs a plurality of multi-endpoint (MEP) optical transceivers in a leaf (or functionally similar) layer thereof. The use of MEP optical transceivers enables the communication network to support a pair of parallel paths for any source/destination pair of network nodes. In an example configuration, data packets that flow through one of the parallel paths go from the source node to the destination node via an electronic packet switch in the network's spine layer. Data packets that flow through another one of the parallel paths go from the source node to the destination node via an optical cross-connect switch. In operation, a network controller may dynamically select which one of the parallel paths to enable for each particular source/destination pair of network nodes, with the selection being made, e.g., based on the data volume to be transmitted between the two nodes.
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4.发明申请MULTICHANNEL DATA TRANSPORT SUITABLE FOR DIRECT OPTICAL DETECTION AT THE RECEIVER 有权多通道数据传输适用于接收器的直接光学检测公开(公告)号：US20160119078A1
公开(公告)日：2016-04-28
申请号：US14863550
申请日：2015-09-24
发明人： Joseph K. Kakande
CPC分类号： H04J14/06 , H04B10/5053 , H04B10/506 , H04B10/516 , H04B10/67 , H04B10/69 , H04J14/02
摘要： We disclose an optical transport system configured to transport the same data using two different channels of an optical transport link in a manner that enables an optical receiver to use direct detection of the optical power received through each of the two channels to measure the in-phase and quadrature components of the modulating electromagnetic field. In an example embodiment, an optical carrier of the modulated optical signal transported using the first of the two channels and an optical carrier of the modulated optical signal transported using the second of the two channels have a fixed relative phase offset of approximately 90 degrees. The resulting ability of the optical receiver to measure each of the in-phase and quadrature components of the modulating electromagnetic field advantageously enables the optical receiver to perform electronic signal equalization, including but not limited to electronic dispersion compensation.
摘要翻译： 我们公开了一种光传输系统，其被配置为使用光传输链路的两个不同信道传输相同的数据，使得光接收机能够直接检测通过两个信道中的每一个接收的光功率来测量同相 和调制电磁场的正交分量。 在一个示例实施例中，使用两个信道中的第一个信道传输的调制光信号的光载波和使用两个信道中的第二个信道传输的调制光信号的光载波具有约90度的固定相对相位偏移。 光接收机测量调制电磁场中的每个同相和正交分量的最终能力有利地使得光接收机能够执行电子信号均衡，包括但不限于电子色散补偿。
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公开(公告)号：US09312980B1
公开(公告)日：2016-04-12
申请号：US14534854
申请日：2014-11-06
发明人： Joseph K. Kakande
CPC分类号： H04J14/0279 , H04B10/40 , H04B10/801 , H04J14/0212 , H04J14/0216 , H04Q11/0001 , H04Q11/0005 , H04Q2011/0016 , H04Q2011/005
摘要： We disclose a communication system in which a cluster of network nodes is interconnected using an optical interconnect and an electrical switch engine. A bidirectional communication channel between any two of the network nodes can be set up using two bidirectional optical links established through the optical interconnect and one bidirectional electrical link configured to connect the ends of the two bidirectional optical links through the switch engine. The optical interconnect has a structure that enables the communication system to be (re)configurable for a desired level of oversubscription. Some embodiments of the communication system can advantageously be used in a data-center network.
摘要翻译： 我们公开了一种通信系统，其中一组网络节点使用光学互连和电气开关引擎互连。 可以使用通过光互连建立的两个双向光链路和被配置为通过交换引擎连接两个双向光链路的末端的一个双向电连接来建立任何两个网络节点之间的双向通信信道。 光学互连具有使通信系统能够（重新）可配置以达到期望的超额预订水平的结构。 通信系统的一些实施例可以有利地用于数据中心网络。
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公开(公告)号：US09762452B2
公开(公告)日：2017-09-12
申请号：US14872837
申请日：2015-10-01
发明人： Joseph K. Kakande
CPC分类号： H04L41/12 , H04L41/0668 , H04L41/0816 , H04L41/0886 , H04Q11/0066 , H04Q2011/0081 , H04Q2011/009
摘要： A network switch having one or more multi-endpoint (MEP) optical transceivers configured to provide an interface for optical data transport through the corresponding network. The use of MEP optical transceivers advantageously enables the network switch to be compatible with multiple network topologies. As a result, various embodiments of the disclosed network switch may be used to provide a builder and/or an operator of the corresponding network with a great deal of flexibility in choosing a network topology and/or degree of redundancy better suitable for the network's intended purpose and/or application without having to change some of the underlying hardware.
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公开(公告)号：US09680599B2
公开(公告)日：2017-06-13
申请号：US14863550
申请日：2015-09-24
发明人： Joseph K. Kakande
CPC分类号： H04J14/06 , H04B10/5053 , H04B10/506 , H04B10/516 , H04B10/67 , H04B10/69 , H04J14/02
摘要： We disclose an optical transport system configured to transport the same data using two different channels of an optical transport link in a manner that enables an optical receiver to use direct detection of the optical power received through each of the two channels to measure the in-phase and quadrature components of the modulating electromagnetic field. In an example embodiment, an optical carrier of the modulated optical signal transported using the first of the two channels and an optical carrier of the modulated optical signal transported using the second of the two channels have a fixed relative phase offset of approximately 90 degrees. The resulting ability of the optical receiver to measure each of the in-phase and quadrature components of the modulating electromagnetic field advantageously enables the optical receiver to perform electronic signal equalization, including but not limited to electronic dispersion compensation.
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公开(公告)号：US20170099189A1
公开(公告)日：2017-04-06
申请号：US14872837
申请日：2015-10-01
发明人： Joseph K. Kakande
CPC分类号： H04L41/12 , H04L41/0668 , H04L41/0816 , H04L41/0886 , H04Q11/0066 , H04Q2011/0081 , H04Q2011/009
摘要： We disclose a network switch having one or more multi-endpoint (MEP) optical transceivers configured to provide an interface for optical data transport through the corresponding network. The use of MEP optical transceivers advantageously enables the network switch to be compatible with multiple network topologies. As a result, various embodiments of the disclosed network switch may be used to provide a builder and/or an operator of the corresponding network with a great deal of flexibility in choosing a network topology and/or degree of redundancy better suitable for the network's intended purpose and/or application without having to change some of the underlying hardware.
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公开(公告)号：US20150050032A1
公开(公告)日：2015-02-19
申请号：US13965402
申请日：2013-08-13
发明人： Joseph K. Kakande
CPC分类号： H04B10/6164 , H04B10/63 , H04L27/0014 , H04L2027/0016
摘要： A digitally locking coherent receiver and a method of coherently receiving a data signal. One embodiment of the receiver includes: (1) a detector configured to recover a composite signal with respect to a local oscillator signal, the composite signal being a combination of a data signal and a reference signal, and (2) a digital signal processor (DSP) communicably coupled to the detector and configured to recognize and compensate for drift in the local oscillator signal with respect to the reference signal.
摘要翻译： 数字锁定相干接收机和相干接收数据信号的方法。 接收机的一个实施例包括：（1）检测器，被配置为相对于本地振荡器信号恢复复合信号，复合信号是数据信号和参考信号的组合，以及（2）数字信号处理器 DSP），其可通信地耦合到检测器并且被配置为识别并补偿本地振荡器信号相对于参考信号的漂移。
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公开(公告)号：US20180115366A1
公开(公告)日：2018-04-26
申请号：US15332810
申请日：2016-10-24
发明人： Joseph K. Kakande
IPC分类号： H04B10/25 , H04B10/40 , H04B10/572 , H04L29/06
CPC分类号： H04B10/2504 , H04B10/2581 , H04B10/40 , H04B10/572 , H04J14/04 , H04L63/0428 , H04L63/062
摘要： We disclose a multichannel optical transceiver having a first optical channel used for client-data transmission over an optical fiber and a second optical channel that enables secure transport of encryption keys over the same optical fiber. In an example embodiment, the first channel uses a first carrier wavelength at which the optical fiber supports a single guided mode. The second channel uses a second carrier wavelength at which the optical fiber supports multiple guided modes. The secure transport of encryption keys can be achieved, e.g., by scrambling the encryption-key data over multiple space-division-multiplexed optical signals transmitted by way of the multiple guided modes. The securely transported encryption keys can then be used to enable the client data transmitted using the first optical channel to be encrypted to frustrate or prevent eavesdropping along the fiber length.
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