Patents by Inventor Arnold Muralt
Arnold Muralt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9660695Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: GrantFiled: June 28, 2016Date of Patent: May 23, 2017Assignee: Ikanos Communication, Inc.Inventors: Laurent Francis Alloin, William Edward Keasler, Jr., Laurent Pierrugues, Arnold Muralt
-
Patent number: 9564946Abstract: The present invention relates generally to addressing performance issues in xDSL communication systems, and more particularly to methods and apparatuses to measure and characterize CM noise impacting a DSL line in a customer premises, measurements and characterization of the projection of these CM signals in Differential Mode (DM), and finally a derivation of an estimate of the loop balance.Type: GrantFiled: June 14, 2016Date of Patent: February 7, 2017Assignee: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, James T. Schley May, Arnold Muralt, Vinay Kumar Chapala
-
Publication number: 20160308580Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: ApplicationFiled: June 28, 2016Publication date: October 20, 2016Inventors: Laurent Francis Alloin, William Edward Keasler, JR., Laurent Pierrugues, Arnold Muralt
-
Publication number: 20160294443Abstract: The present invention relates generally to addressing performance issues in xDSL communication systems, and more particularly to methods and apparatuses to measure and characterize CM noise impacting a DSL line in a customer premises, measurements and characterization of the projection of these CM signals in Differential Mode (DM), and finally a derivation of an estimate of the loop balance.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Inventors: Laurent Francis Alloin, James T.Schley May, Arnold Muralt, Vinay Kumar Chapala
-
Patent number: 9426283Abstract: The present invention relates to a method by which an xDSL modem can be properly connected and/or optimally tuned to achieve a desired performance goal based on knowledge obtained by first performing a SELT test and then post-processing the results of that test. In embodiments, the processed SELT results are used to detect bad connections or other anomalies such as split pairs. In embodiments, the processed SELT results are used to configure programmable components and filters in the analog front end in a manner that achieves the performance goal. In these and other embodiments, the performance goal is to maximize the attainable data rate. As such, through various hardware design options and configurations according to the invention, the performance of the modem can be tuned such that even in the presence of undesirable loop characteristics, adequate, or even good performance, can be achieved.Type: GrantFiled: March 27, 2015Date of Patent: August 23, 2016Assignee: Ikanos Communications, Inc.Inventors: Robin Levonas, Vipin Pathak, Arnold Muralt
-
Patent number: 9413424Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: GrantFiled: October 19, 2015Date of Patent: August 9, 2016Assignee: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, William Edward Keasler, Jr., Laurent Pierrugues, Arnold Muralt
-
Patent number: 9385781Abstract: The present invention relates generally to addressing performance issues in xDSL communication systems, and more particularly to methods and apparatuses to measure and characterize CM noise impacting a DSL line in a customer premises, measurements and characterization of the projection of these CM signals in Differential Mode (DM), and finally a derivation of an estimate of the loop balance.Type: GrantFiled: February 23, 2015Date of Patent: July 5, 2016Assignee: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, James T. Schley May, Arnold Muralt, Vinay Kumar Chapala
-
Publication number: 20160043772Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: ApplicationFiled: October 19, 2015Publication date: February 11, 2016Inventors: Laurent Francis Alloin, William Edward Keasler, JR., Laurent Pierrugues, Arnold Muralt
-
Patent number: 9166651Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: GrantFiled: October 17, 2013Date of Patent: October 20, 2015Assignee: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, William Edward Keasler, Jr., Laurent Pierrugues, Arnold Muralt
-
Publication number: 20150281434Abstract: The present invention relates to a method by which an xDSL modem can be properly connected and/or optimally tuned to achieve a desired performance goal based on knowledge obtained by first performing a SELT test and then post-processing the results of that test. In embodiments, the processed SELT results are used to detect bad connections or other anomalies such as split pairs. In embodiments, the processed SELT results are used to configure programmable components and filters in the analog front end in a manner that achieves the performance goal. In these and other embodiments, the performance goal is to maximize the attainable data rate. As such, through various hardware design options and configurations according to the invention, the performance of the modem can be tuned such that even in the presence of undesirable loop characteristics, adequate, or even good performance, can be achieved.Type: ApplicationFiled: March 27, 2015Publication date: October 1, 2015Inventors: Robin LEVONAS, Vipin PATHAK, Arnold MURALT
-
Publication number: 20150244419Abstract: The present invention relates generally to addressing performance issues in xDSL communication systems, and more particularly to methods and apparatuses to measure and characterize CM noise impacting a DSL line in a customer premises, measurements and characterization of the projection of these CM signals in Differential Mode (DM), and finally a derivation of an estimate of the loop balance.Type: ApplicationFiled: February 23, 2015Publication date: August 27, 2015Inventors: Laurent Francis ALLOIN, James T. Schley MAY, Arnold MURALT, Vinay Kumar CHAPALA
-
Publication number: 20140177694Abstract: The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.Type: ApplicationFiled: October 17, 2013Publication date: June 26, 2014Inventors: Laurent Francis ALLOIN, William Edward KEASLER, JR., Laurent PIERRUGUES, Arnold MURALT
-
Patent number: 8687770Abstract: One embodiment is a method for performing 2-wire line imbalance measurements. The method comprises receiving a probe signal and based on the probe signal, determining one of more of: an estimated transverse conversion loss (TCL) coupling transfer function and an estimated transverse conversion transfer loss (TCTL) coupling transfer function.Type: GrantFiled: April 27, 2011Date of Patent: April 1, 2014Assignee: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, Arnold Muralt, Laurent Pierrugues
-
Patent number: 8619969Abstract: An adaptive hybrid system is coupled to a loop for adjusting trans-hybrid loss. The system comprises a fixed portion comprising a first receiver transfer function block and a first hybrid transfer function block. The fixed portion is configured to receive a far-end signal and mitigate frequency dependent attenuation experienced by the far-end signal. The system also comprises a variable portion comprising a second receiver transfer function block and a second hybrid transfer function block configured to subtract a transmit echo from the received far-end signal.Type: GrantFiled: August 17, 2010Date of Patent: December 31, 2013Assignee: Ikanos Communications, Inc.Inventors: Arnold Muralt, Eduard Sackinger, Fenghua Zheng, Fred Larsen
-
Publication number: 20110268258Abstract: One embodiment is a method for performing 2-wire line imbalance measurements. The method comprises receiving a probe signal and based on the probe signal, determining one of more of: an estimated transverse conversion loss (TCL) coupling transfer function and an estimated transverse conversion transfer loss (TCTL) coupling transfer function.Type: ApplicationFiled: April 27, 2011Publication date: November 3, 2011Applicant: Ikanos Communications, Inc.Inventors: Laurent Francis Alloin, Arnold Muralt, Laurent Pierrugues
-
Publication number: 20110044415Abstract: An adaptive hybrid system is coupled to a loop for adjusting trans-hybrid loss. The system comprises a fixed portion comprising a first receiver transfer function block and a first hybrid transfer function block. The fixed portion is configured to receive a far-end signal and mitigate frequency dependent attenuation experienced by the far-end signal. The system also comprises a variable portion comprising a second receiver transfer function block and a second hybrid transfer function block configured to subtract a transmit echo from the received far-end signal.Type: ApplicationFiled: August 17, 2010Publication date: February 24, 2011Applicant: Ikanos Communications, Inc.Inventors: Arnold Muralt, Eduard Sackinger, Fenghua Zheng, Fred Larsen
-
Patent number: 7558316Abstract: A system and a method for constructing a signal integrity supervisor capable of both detecting and triggering an appropriate response when transmit path signals indicate a potential damaging transmitter operating mode. The system and method of the present invention takes advantage of the inherent property of a Delta-Sigma Modulator (DSM) which makes the probability of encountering a long string of consecutive ones or zeroes during nominal operation very small. The signal integrity supervisor ensures safe transmitter operation by monitoring the data and the clock inputs to a digital to analog converter. The system may comprise a data signal supervisor and a clock signal supervisor. The data supervisor may comprise a comparator and a counter and may be configured to power down a line driver upon detecting a data stream having a continuous voltage level.Type: GrantFiled: February 25, 2004Date of Patent: July 7, 2009Assignee: Brooktree Broadband Holding, Inc.Inventors: Christian Eichrodt, Frode Larsen, Arnold Muralt
-
Patent number: 7555036Abstract: A system and a method for constructing a signal integrity supervisor capable of both detecting and triggering an appropriate response when transmit path signals indicate a potential damaging transmitter operating mode. The system and method of the present invention takes advantage of the inherent property of a Delta-Sigma Modulator (DSM) which makes the probability of encountering a long string of consecutive ones or zeroes during nominal operation very small. The signal integrity supervisor ensures safe transmitter operation by monitoring the data and the clock inputs to a digital to analog converter. The system may comprise a data signal supervisor and a clock signal supervisor. The data supervisor may comprise a comparator and a counter and may be configured to power down a line driver upon detecting a data stream having a continuous voltage level.Type: GrantFiled: February 25, 2004Date of Patent: June 30, 2009Assignee: Brooktree Broadband Holding, Inc.Inventors: Christian Eichrodt, Frode Larsen, Arnold Muralt
-
Patent number: 7031378Abstract: A single unified digital subscriber line (DSL) transceiver can be used for DSL applications, can be integrated on a single board or chip, or within a less board space. An embodiment of the unified DSL transceiver comprises a transmit circuit coupled to a line driver/transformer circuit. The line driver/transformer circuit is coupled to a receive circuit that comprises a switching circuit. A signal is transmitted from the transmit circuit to the line driver/transformer circuit; the switching circuit is configured based on DSL applications, and the signal is propagated from the line driver/transformer circuit to a line.Type: GrantFiled: June 25, 2001Date of Patent: April 18, 2006Assignee: Globespan, Inc.Inventors: Arnold Muralt, Christian Eichrodt
-
Patent number: 7010025Abstract: An improved analog front end and methods for increasing the power efficiency of duplex signals on a transmission line are disclosed. The improved analog front end bifurcates a hybrid into a fixed portion and an adaptive portion. The adaptive portion combines a biquad and a summer to produce a filter transfer function suited to compensate for transmission line irregularities. A method for configuring a local transceiver to minimize power requirements at a remote transmitter is disclosed. Broadly the method entails, applying a transmit signal to a front end in the absence of a remote signal; optimizing the transmit signal power; recording the reflected transmit signal; applying an adaptive filter in response to transmission line irregularities; and controllably adjusting the adaptive filter to minimize the amplitude of the reflected version of the transmit signal in the receive path. A method for recovering a remotely generated signal is also disclosed.Type: GrantFiled: May 22, 2001Date of Patent: March 7, 2006Assignee: GlobespanVirata, Inc.Inventors: Markus Helfenstein, Drahoslav Lim, George S. Moschytz, Arnold Muralt