Patent application number | Description | Published |
20110129234 | Iterative Carrier Phase Compensation in Coherent Fiber Optic Receivers - A method and an optical receiver compensates for an error in a phase of an optical signal in a receiver. The signal includes blocks of symbols in a sequence. Each block is decoded based on a partially phase compensated symbols, and an average phase error for the block is estimated. Forward phase compensation and backward phase compensation is performed on the block based on the average phase error, and the decoding, estimating, performing is iterated until a termination condition is satisfied to produce a phase compensated block. | 06-02-2011 |
20120170934 | Methods for Determining Energy Efficient Optical Routes - An optical network includes multiple source, cross connect, and destination nodes. A traffic demand matrix is constructed for each possible pair of combinations of the source nodes and the destination nodes. A first energy reduction metric is determined for creating the bypass between the source node and any XC node based on the traffic demand matrix, and a second energy reduction metric is determined for creating the bypass between any XC node and the destination node using the traffic demand matrix. Then, a bypass that terminates at one of the XC nodes that has a largest energy reduction metric is created. | 07-05-2012 |
20120185755 | METHOD FOR PERFORMING SOFT DECISION DECODING OF EUCLIDEAN SPACE REED-MULLER CODES - Soft decision decoding of a codeword of a Reed-Muller (RM) code by | 07-19-2012 |
20120263454 | Crosstalk-Free High-Dimensional Constellations for Dual-Polarized Nonlinear Fiber-Optic Communications - A method reduces time-varying polarization crosstalk due to XPolM by transmitting multi-dimensional orthogonal constellations. Three variants of crosstalk-free constellations are provided: Grassmann constellations, unitary constellations, and rotation codes. The method uses the Grassmann constellations and the unitary constellations to deal with fiber nonlinearity by applying as a polarization-time coding. The rotation codes exploit a fiber channel characteristic to improve performance and to reduce computational complexity. The underlying orthogonality behind those constellations enables the receiver to decode it as if there is no polarization crosstalk. Moreover, the required computational complexity at the receiver is significantly reduced because neither crosstalk cancellers nor channel estimators are needed. | 10-18-2012 |
20120263464 | Adaptive Cross-Polarization Modulation Cancellers for Coherent Optical Communication Systems - For coherent fiber optic communications, the nonlinear XPolM impairment is the most important issue to realize over-100 Gbps high-speed transmissions. A method provides a way to cancel time-varying XPolM crosstalk by introducing multi-stage adaptive mechanism. In the method, a low-complexity adaptive filtering based on recursive least-squares (RLS) first tracks the time-varying crosstalk along with the per-survivor trellis-state decoding. The estimated channel and the decoded data are then used to calculate the empirical covariance, which is in turn exploited to obtain more accurate channel estimates by means of optimal-weighted least-squares. This is performed with a low-complexity processing over frequency domain with fast Fourier transform. The performance is significantly improved with turbo principle decoding, more specifically, iterative decoding and iterative estimation over a block. | 10-18-2012 |
20130170842 | Method and System for Equalization and Decoding Received Signals Based on High-Order Statistics in Optical Communication Networks - A method equalizes and decodes a received signal including a sequence of symbols. Subsequences of the signal are selected, wherein the subsequences are overlapping and time shifted. For each subsequence, statistics of the channel corresponding to a pattern in the subsequence are selected, wherein the statistics include high-order statistics. A transmitted signal corresponding to the received signal is then estimated based on the statistics. | 07-04-2013 |
20130258841 | Method for Protecting Data Transmission in MPLS Networks Due to Failures - A method protects data transmission from failures, wherein the data transmissions are from a source to a destination in a Multi-Protocol Label Switching (MPLS) network, and the data transmissions are via a labeled-switch path (LSP) with segment protection in protection domains. A maximum recovery time for each protection domain is constrained, and for each protection domain, one or more backup tunnels are determined. A graph of nodes of the LSP and the backup tunnels is constructed, wherein edges in the graph represent the links between the nodes. A weight is assigned to each edge to produce a weighted graph. Based on the weighted graph, a path from the source to the destination that satisfies a reliability constraint with a minimum cost is determined by using an optimal combination of segment protections and a reliability-guaranteed least-cost | 10-03-2013 |
20140133848 | Adaptively Coding and Modulating Signals Transmitted Via Nonlinear Channels - An adaptive coding scheme for nonlinear channels improves reliability and an efficiency in digital communication networks. The method monitors channel statistics to analyze an extrinsic information transfer chart of the channels. The channel statistics are fed back to the transmitter to adapt forward error correction coding. A parametric analysis method uses a Gaussian mixture model. The statistical information feedback can adapt an ARQ sheme by adding a weighted received signal to the original coded signals to reduce nonlinear distortion. Trellis shaping, can make the transmitting signal preferable for nonlinear channels. | 05-15-2014 |
20140204759 | Load Balanced Routing for Low Power and Lossy Networks - A node includes a receiver for receiving a first packet from a first node at a first time and a second packet from a second node at a second time, a processor for determining the first time and the second time and for comparing the first time with the second time to produce a ratio of workloads of the first node and the second node, and a transmitter for transmitting packets to the first and the second nodes based on the ratio. | 07-24-2014 |
20140304383 | Method for Clustering Devices in Machine-to-Machine Networks to Minimize Collisions - Nodes in a network are clustered by first determining, in each node, a cluster head capability (CHC). The CHC is broadcasting, directly or indirectly, until all nodes have received the CHCs. Each node nominates, one or more candidate cluster heads based on the CHCs, and then, in each node, at least one cluster head is selected from the candidate cluster head nodes based on maximal CHCs. | 10-09-2014 |
20150085668 | Discovering Stable Routes in Wireless Networks - A method discovers routes for forwarding packets from source nodes (sources) to sink nodes (sinks) in a wireless network, wherein some neighboring sources act as relay nodes. Each source measures a rate of receiving control messages from each neighboring node. Then, the data packets are forwarded from a particular source to the sink via the neighboring nodes having a lowest rate. | 03-26-2015 |
20150085696 | Method for Discovering Neighboring Nodes in Wireless Networks - A method discovers neighboring nodes in a wireless network of nodes. The nodes include a set of concentrators acting as IPv6 routers and a set of sensor nodes acting as IPv6 hosts. The sensor nodes can also act as relay nodes. In each node, a 64-bit interface ID is configured using a 48-bit MAC address. In each node, a unique IPv6 link-local address is configured using the 64-bit interface ID. In each node, the neighboring nodes are discovered by transmitting unsolicited Neighbor Advertisement (NA) messages. A Router Advertisement (RA) messages is distributed from the concentrators to the sensor nodes meters by using the relay nodes. In each node, a unique IPv6 address is configured and registered at the concentrators by using the relay nodes. | 03-26-2015 |
20150109053 | Method for Separating Multi-Component Signals - A method separates a multi-component signal by first estimating parameters of the signal. Then, using periodicity-based algebraic separation and energy-based demodulation, the signal is separated into components according to the parameters and constraints. Last, a Teager-Kaiser energy detector is applied to each component to provide a direct current signal for each component, and the constraint for each component used by the separating. | 04-23-2015 |
20150156736 | Passive Synchronization in Wireless Networks - A method for synchronizing a node to a data sink determines a first time of receiving by the node a packet transmitted by a neighboring node and a second time of receiving by the data sink or a synchronized neighboring node the packet transmitted by the neighboring node. The node is synchronized to the data sink based on the difference between the first time and the second time. | 06-04-2015 |
20150156738 | Synchronized Multi-Sink Routing for Wireless Networks - A method transmitting packets in a wireless network including a node, a first data sink and a second data sink is disclosed. The method performs a synchronization of the node with the first data sink and the second data sink and transmits first data packets from the node to the first data sink at a first allocated time synchronized with the first data sink. Next, the method transmits second data packets from the node to the second data sink at a second allocated time synchronized with the second data sink. The first and the second data packets are transmitted without updating the synchronization. | 06-04-2015 |
20150211896 | Frequency-Domain Multi-Element Capacitive Proximity Sensor Array Based on a Bandstop Filter Design - A proximity sensor detects an object. The sensor includes a set of two or more sensing elements. Each sensing elements includes a bandstop filter for selecting a different notch resonant frequency for the element. The notch resonant frequencies are isolated from each other. A change in transmission around each notch frequency is measured detect to the object. | 07-30-2015 |
20150280966 | Optical Channel Data Unit Switch with Distributed Control - An optical channel data unit (ODU) switch includes a set of two or more client cards, a set of two or more line cards, and a set of two or more switch cards. Each switch card is connected to all client cards, all line cards, and all other switch cards, and each client card, line card and switch card includes control logic for managing an operation of the ODU switch in a distributed manner. | 10-01-2015 |
20150378025 | Multipath Detection for Global Positioning System - A satellite navigation system includes a first Global Navigation Satellite System (GNSS) receiver for determining a first value of a parameter of a GNSS signal and a second GNSS receiver for determining a second value of the parameter of the GNSS signal. The first GNSS receiver is rigidly connected to the second GNSS receiver. The GNSS also includes a processor for comparing the first value of the parameter with the second value of the parameter to detect a multipath of the GNSS signal. | 12-31-2015 |
20160006515 | Method for Generating Constant Modulus Multi-Dimensional Modulations for Coherent Optical Communications - A method generates constant modulus multi-dimensional modulations for coherent optical communications by first projecting points in a constellation of the code onto a Poincare sphere or its higher-dimensional hyper-sphere. By using meta-heuristic procedures, nonlinear programming and gradient search methods, constellation points in the hyper-sphere are optimized in certain criteria, such as maximizing the minimum Euclidean distance, minimizing the union bound, minimizing the bit-error rate, minimizing the required signal-to-noise ratio, maximizing the nonlinear fiber reach, maximizing the phase noise tolerance, and maximizing the mutual information. Some methods use parametric unitary space-time block codes such as Grassmannian packing, and filter impulse response as well as unitary rotation over adjacent code blocks to generate near-constant modulus waveform, not only at the symbol timing, but also over the entire time. | 01-07-2016 |
20160080087 | Inter-Channel Interference Management for Optical Super-Channels - The transmission of data from a transmitter to a receiver over an optical super-channel including a set of sub-channels of different frequencies includes partitioning the data into a set of data streams including one data stream for each sub-channel and partitioning each data stream into a set of sub-streams. Each sub-stream of each data stream is encoded with different forward error correction (FEC) codes to produce a set of encoded sub-streams for each data stream, and the set of encoded sub-streams of each data stream are superimposed with different powers to produce a set of encoded data streams. The set of encoded data streams is multiplexed to produce an optical signal transmitted over the set of sub-channels of the optical super-channel. | 03-17-2016 |
Patent application number | Description | Published |
20090030422 | Implant insertion device and method - A method and system for insertion of an implant is disclosed. One embodiment of a system for use in implanting a spinal prosthesis incorporating principles of the invention includes an insertion assembly housing with a channel extending from a distal end portion to a proximal end portion, a gripper having a prosthesis coupling portion for coupling with a spinal prosthesis and an end portion, and a coupler member having a gripper coupling portion rotatably positioned within the channel and configured to couple with the end portion of the gripper within the channel. | 01-29-2009 |
20140081659 | SYSTEMS AND METHODS FOR SURGICAL AND INTERVENTIONAL PLANNING, SUPPORT, POST-OPERATIVE FOLLOW-UP, AND FUNCTIONAL RECOVERY TRACKING - Various systems and methods are provided for surgical and interventional planning, support, post-operative follow-up, and functional recovery tracking. In general, a patient can be tracked throughout medical treatment including through initial onset of symptoms, diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment. In one embodiment, a patient and one or more medical professionals involved with treating the patient can electronically access a comprehensive treatment planning, support, and review system. The system can provide recommendations regarding diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment based on data gathered from the patient and the medical professional(s). The system can manage the tracking of multiple patients, thereby allowing for data comparison between similar aspects of medical treatments and for learning over time through continual data gathering, analysis, and assimilation to decision-making algorithms. | 03-20-2014 |
20140088990 | SYSTEMS AND METHODS FOR SURGICAL AND INTERVENTIONAL PLANNING, SUPPORT, POST-OPERATIVE FOLLOW-UP, AND, FUNCTIONAL RECOVERY TRACKING - Various systems and methods are provided for surgical and interventional planning, support, post-operative follow-up, and functional recovery tracking. In general, a patient can be tracked throughout medical treatment including through initial onset of symptoms, diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment. In one embodiment, a patient and one or more medical professionals involved with treating the patient can electronically access a comprehensive treatment planning, support, and review system. The system can provide recommendations regarding diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment based on data gathered from the patient and the medical professional(s). The system can manage the tracking of multiple patients, thereby allowing for data comparison between similar aspects of medical treatments and for learning over time through continual data gathering, analysis, and assimilation to decision-making algorithms. | 03-27-2014 |
20150261922 | Systems And Methods For Surgical And Interventional Planning, Support, Post-Operative Follow-Up, And Functional Recovery Tracking - Various systems and methods are provided for surgical and interventional planning, support, post-operative follow-up, and functional recovery tracking. In general, a patient can be tracked throughout medical treatment including through initial onset of symptoms, diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment. In one embodiment, a patient and one or more medical professionals involved with treating the patient can electronically access a comprehensive treatment planning, support, and review system. The system can provide recommendations regarding diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment based on data gathered from the patient and the medical professional(s). The system can manage the tracking of multiple patients, thereby allowing for data comparison between similar aspects of medical treatments and for learning over time through continual data gathering, analysis, and assimilation to decision-making algorithms. | 09-17-2015 |
20150282796 | Systems And Methods For Surgical And Interventional Planning, Support, Post-Operative Follow-Up, And, Functional Recovery Tracking - Various systems and methods are provided for surgical and interventional planning, support, post-operative follow-up, and functional recovery tracking. In general, a patient can be tracked throughout medical treatment including through initial onset of symptoms, diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment. In one embodiment, a patient and one or more medical professionals involved with treating the patient can electronically access a comprehensive treatment planning, support, and review system. The system can provide recommendations regarding diagnosis, non-surgical treatment, surgical treatment, and recovery from the surgical treatment based on data gathered from the patient and the medical professional(s). The system can manage the tracking of multiple patients, thereby allowing for data comparison between similar aspects of medical treatments and for learning over time through continual data gathering, analysis, and assimilation to decision-making algorithms. | 10-08-2015 |
Patent application number | Description | Published |
20090285540 | FIBER DISTRIBUTION DEVICE - A fiber distribution device includes a swing frame chassis pivotally mounted to a support structure. At least a first optical splitter module is mounted to the swing frame chassis. Pigtails having connectorized ends are carried by the swing frame chassis and have portions that are routed generally vertically on the swing frame chassis. An optical termination field includes fiber optic adapters carried by the swing frame chassis. The fiber optic adapters are configured to receive the connectorized ends of the pigtails. | 11-19-2009 |
20090290843 | FIBER DISTRIBUTION HUB - A fiber distribution hub includes a frame within the enclosure, the frame having a swinging portion configured to pivot from a first position to a second position. The fiber distribution hub also includes a subscriber termination field mounted on the swinging portion; at least one optical splitter mounted on the frame; and a pigtail fiber routed from the optical splitter. The swinging portion swings from the first position to the second position without increasing a distance for routing the pigtail fiber from the optical splitter to a first front termination connection. | 11-26-2009 |
20090297111 | PARKING IN FIBER DISTRIBUTION HUBS - A fiber distribution hub includes a panel mounted within and pivotally movable relative to an enclosure. One or more connector holders are carried by the panel. The connector holders are provided at a connector storage location. The connector holders have a construction different than a functional fiber optic adapter. | 12-03-2009 |
20100124392 | Fiber Distribution Hubs with Swing Frame Chassis - A fiber distribution hub includes a swing frame chassis pivotally mounted within an enclosure. The swing frame chassis includes a splitter mounting location at which optical splitters can be mounted and an optical termination field. The optical termination field includes multiple fiber optic adapters. | 05-20-2010 |
20110019966 | FIBER DISTRIBUTION DEVICE - A fiber distribution device includes a swing frame chassis pivotally mounted to a support structure. At least a first optical splitter module is mounted to the swing frame chassis. Pigtails having connectorized ends are carried by the swing frame chassis and have portions that are routed generally vertically on the swing frame chassis. An optical termination field includes fiber optic adapters carried by the swing frame chassis. The fiber optic adapters are configured to receive the connectorized ends of the pigtails. | 01-27-2011 |
20140050451 | FIBER DISTRIBUTION DEVICE - A fiber distribution device includes a swing frame chassis pivotally mounted to a support structure. At least a first optical splitter module is mounted to the swing frame chassis. Pigtails having connectorized ends are carried by the swing frame chassis and have portions that are routed generally vertically on the swing frame chassis. An optical termination field includes fiber optic adapters carried by the swing frame chassis. The fiber optic adapters are configured to receive the connectorized ends of the pigtails. | 02-20-2014 |
20140254986 | PASSIVE DISTRIBUTION SYSTEM USING FIBER INDEXING - The present disclosure relates to systems and method for deploying a fiber optic network. Distribution devices are used to index fibers within the system to ensure that live fibers are provided at output locations throughout the system. In an example, fibers can be indexed in multiple directions within the system. In an example, fibers can be stored and deployed form storage spools. | 09-11-2014 |
20150093091 | FIBER DISTRIBUTION DEVICE - A fiber distribution device includes a swing frame chassis pivotally mounted to a support structure. At least a first optical splitter module is mounted to the swing frame chassis. Pigtails having connectorized ends are carried by the swing frame chassis and have portions that are routed generally vertically on the swing frame chassis. An optical termination field includes fiber optic adapters carried by the swing frame chassis. The fiber optic adapters are configured to receive the connectorized ends of the pigtails. | 04-02-2015 |
20150338600 | FIBER DISTRIBUTION DEVICE - A fiber distribution device includes a swing frame chassis pivotally mounted to a support structure. At least a first optical splitter module is mounted to the swing frame chassis. Pigtails having connectorized ends are carried by the swing frame chassis and have portions that are routed generally vertically on the swing frame chassis. An optical termination field includes fiber optic adapters carried by the swing frame chassis. The fiber optic adapters are configured to receive the connectorized ends of the pigtails. | 11-26-2015 |