Tokyo Electron Limited

Tymphany Hk Limited

Actelis Networks (israel) Ltd.

Other

Tymphany Worldwide Enterprises Limited

Ioannis Kanellakopoulos

Sunil C Shah

Mark Alan Erickson

John Josef Hench

Alireza Jabbari

Kenneth L Kantor

Michail Konstantinos Tsatsanis

Thorkell Gudmundsson

Gurcan Aral

Amit Priebatch

James W Waite

David J Prince

Andrew David Unruh

Robert J True

Edward T Norcott, Jr

Yaolong Tan

Jens-Peter Axelsson

Shaolin Wei

Ming Gu

Harbinder Singh

Cecilia Gabriela Galarza

Maya Bar-El

Daniel Joseph Hernandez

Tuvia Barlev

Norman Man Leung Yuen

Amir Gholamhossein Zadeh Aghdam

Amit Levy

Oscar Magnus Stafsudd

Stephen P Boyd

Nicholas Bambos

Eitan Tsur

Johan D Overby

Elad Domanovitz

Mauricio Nurko

Phyllis R Nelson

Thomas E Par&eacute;, Jr

Kun Li

Thomas E Paré, Jr

Di Lin

Fernando Lopez-de-Victoria

Heberly Rosario

Amir Gholamhossein Zadeh Comordia Univ Aghdam

An acoustic transducer comprises one or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers. The diaphragms may be driven directly, inertially or fluidically. If diaphragms are driven by rods that pass through holes in the diaphragms, noise may be generated by air that leaks through the pass-through holes. This noise may be reduced or eliminated by measures that reduce or eliminate the air leakage.

Acoustic transducer comprising a plurality of coaxially arranged diaphragms

A device for managing signal transport, on a cable level, in a communication system, and a method for using same, are provided herein. The device is connectable between one or more access multiplexers (e.g., Very-high-speed Digital Subscriber Loop Access Multiplexer (VDSLAM) or a switch) and a cable in said communication system. The device includes: a plurality of access multiplexer-side transceivers connectable to access multiplexer-related physical medium, associated with said one or more access multiplexers; a plurality of customer-side transceivers connectable to respective customer-related wire pairs of said cable; and a processor connected to said access multiplexer-side transceivers and said customer-side transceivers, said processor comprising means for reducing crosstalk among said customer-related wire pairs. In some embodiments, vectoring is used for the crosstalk reduction, thus implementing a so-called cable level vectoring (CLV).

Cable-level crosstalk reduction

An acoustic transducer includes a housing, a plurality of diaphragms suspended from the housing and separated into one or more groups, and one or more motors combined with the housing that operate in response to an electrical signal. The diaphragms of each group are driven by a respective motor to which all the diaphragms in the group are coupled and at least one motor has an indirect coupling with no direct mechanical connection to the diaphragms driven thereby. One or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be difficult or impossible with traditional transducers.

A method for operating an acoustic transducer is provided. The acoustic transducer includes a moving element and a fixed element, wherein the moving element is coupled to surrounding air. In the method, a signal-independent magnetic field is generated to urge the moving element into a rest position when no input signal is received; and a force is generated in response to the input signal and applying that force to the moving element to urge the moving element away from the rest position. The moving element is controlled by a combined influence of the signal-independent magnetic field and the signal-dependent force to generate acoustic vibrations in response to an audio input signal.

Magnetic suspension transducer

A system and method for providing a service over a repeatered link that couples a service provider transceiver to a remote modem, the method includes: computing, for each frequency bin out of multiple frequency bins of a spectrum, a level of far-end cross-talk (FEXT) interference that is generated to a network-side receiver of a frequency division multiplexing (FDM) discrete multi tone (DMT) repeater by a service provider transmitter that provides an FDM DMT service that is supported by the FDM DMT repeater; computing, for each frequency bins out of the multiple frequency bins, a highest allowable transmit power level of a customer-side transmitter of the FDM DMT repeater that generates to the network-side receiver of the FDM DMT repeater a cross-talk interference that does not exceed a level of FEXT interference that is generated to the network-side receiver of the FDM DMT repeater by the service provider transmitter.

Method and system for installing and operating discrete multi tone repeaters

An improved electrodynamic acoustic transducer eliminates or reduces the need for flexible or elastic materials to suspend an internal magnetic element by using both static and dynamic signal-dependent magnetic fields to control its movement. In one implementation, the transducer has a magnet that moves within a surrounding tube. This tube in turn supports one or more electromagnetic coils that generate a dynamic signal-dependent magnetic field that causes the internal magnetic element to vibrate. The surrounding tube also supports one or more magnets whose location on the tube is fixed and whose magnetic fields provide appropriate restoring forces acting on the internal magnetic element. These fixed magnets may be replaced or supplemented by ferromagnetic materials. This transducer may provide sound and infrasonic vibration by coupling the internal magnetic element to other radiating elements or by being placed in close proximity to or in actual contact with the pinna or meatus of the human ear when used in headphones or earphones, for example, and it also may provide sound through the direct vibration of the air in contact with the surface of the internal magnetic element. When direct atmospheric coupling is not required, the transducer may be assembled in a sealed enclosure.

Mitigation of spectral interference in communications systems such as Digital Subscriber Loop (DSL) systems, and in particular mitigation of spectral interference using dynamic spectral shaping (DSS) in DSL systems, and in particular Single-pair High-speed DSL (SHDSL) systems.

Method and system for applying dynamic spectral shaping to digital subscriber loop communication systems

A DSL communication system and a method for configuring a DSL communication system. The method includes training at least one anchor DSL modem transmitter to transmit information over at least one anchor line at an anchor bit rate that is determined based on an allowable tolerable noise level and a minimum allowable signal-to-noise ratio (SNR) margin; training one or more other DSL modem transmitter to transmit information over one or more other line at a bit rate that is determined by a current noise level and a target SNR margin, wherein the target SNR margin is higher than the minimum allowable SNR margin; and transmitting information by at least one trained DSL modem transmitter to at least one DSL modem receiver.

Method and system for robust digital subscriber loop communication

Signals in a multi-channel, impaired communication system are post-processed at the receiver. A triangular matrix Decision Feedback Demodulator (DFD) at the receiver extracts channels without requiring delivery of receiver parameters to the transmitter. Multi-Input Multi-Output (MIMO) processing matrices and DFD parameters are computed by first applying matrix transformations to diagonalize the noise covariance matrix of the multiple channels received at the receiver. QR decompositions (i.e., decompositions into orthogonal and triangular matrices) are then applied to the main channels to obtain triangular channel matrices. The noise-diagonalizing transformations and QR decompositions are then combined to form the MIMO postprocessing matrices and DFD parameters. MIMO postprocessing matrices and DFD parameters are computed from training data and then adapted during live data transmission.

Mitigation of interference and crosstalk in communications systems

A method and apparatus are disclosed for the prediction and optimization of a communications system. The present invention provides for the prediction and optimization of the performance of a communications system comprising the steps of inputting a plurality of channels, predicting a performance of each channel using a plurality of parameters to characterize the performance of the channel, and possibly optimizing the parameters of each channel according to a design criteria.

Method and apparatus for the prediction and optimization in impaired communication systems

A method and system are disclosed for improving the performance of a multiline transmission system by using one or more split-pair receivers in a multiline communications system to identify crosstalk on a pair of transceivers coupled to the split pair receivers, wherein each split pair receiver receives a signal including the crosstalk from each transceiver and provides a corresponding signal vector to a post processing unit, and performing MIMO post-processing on signal vectors received at a receiver from each transceiver and each split-pair receiver while minimizing crosstalk on pairs of lines in the multiline communications system with a frequency equalizer.

Method and system for split-pair reception in twisted-pair communication systems

A method and system for providing window shaping for multiline transmission in a communications system are described. A last portion of a prefix symbol is extracted. A prefix with a prefix window is shaped to create a shaped prefix. A DMT symbol is shaped with a DMT window to create a shaped DMT symbol. The shaped DMT symbol is combined with the shaped prefix.

Method and system for providing window shaping for multiline transmission in a communications system

A method and system are disclosed for creating dynamic models of etch processes in semiconductor manufacturing. In one embodiment, a method comprises modeling an etch process used in semiconductor manufacturing to generate a dynamic process model. The dynamic process model is used to determine input values that result in a desired output value. A process recipe is optimized for the etch process with the input values.

Method and system for dynamic modeling and recipe optimization of semiconductor etch processes

A method that sends upstream a collection of data samples measured from a DSL line.

Method and apparatus for cooperative diagnosis of impairments and mitigation of disturbers in communication systems

Growing community of inventors

Cupertino, CA, United States of America

Ioannis Kanellakopoulos