Patents by Inventor Laurent Pierrugues
Laurent Pierrugues 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: 8418018Abstract: A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.Type: GrantFiled: September 24, 2009Date of Patent: April 9, 2013Assignee: Ikanos Communications, Inc.Inventors: Julien Pons, Patrick Duvaut, Oliver Moreno, Laurent Pierrugues
-
Publication number: 20120201286Abstract: A system, method, and a computer readable medium having instructions thereupon for synchronized multi-user multi-carrier communications are provided. For example, a synchronized multi-user multi-carrier communication system includes a transmitter, a receiver communicatively coupled to the transmitter via a plurality of communication channels associated with multiple users, and a computing device, coupled to at least one of the transmitter and the receiver, comprising a memory device in communication with one or more processors. The one or more processors are configured to obtain noise samples for the plurality of communication channels, determine a coupling between carriers on the plurality of communication channels, determine a noise model for a carrier based upon the noise samples and the determined coupling, and store the noise model in the memory device.Type: ApplicationFiled: February 8, 2012Publication date: August 9, 2012Inventors: Julien Pons, Laurent Alloin, Laurent Pierrugues
-
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: 20110235759Abstract: In accordance with one embodiment, a method is implemented in a vectored system for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line in the system. The method comprises mitigating, by the vectored system, self-induced far-end crosstalk (self-FEXT) on the victim line based on self-FEXT mitigation coefficients and receiving, by a second sensor, information relating to at least one of: self-FEXT of the vectored system, external noise, and the far end transmitted signal. The method further comprises learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor and removing self-FEXT from the second sensor based on the learned coefficients. Upon removal of self-FEXT from the second sensor, a linear combiner configured to combine information relating to the victim line and the second line is learned.Type: ApplicationFiled: March 18, 2011Publication date: September 29, 2011Applicant: IKANOS COMMUNICATIONS, INC.Inventors: Laurent Pierrugues, Laurent Francis Alloin, Amitkumar Mahadevan
-
Patent number: 7764752Abstract: A method and system of the present inventions reduces both near-end crosstalk (NEXT) and far-end crosstalk (FEXT) interferences due to handshake tones into upstream and downstream neighboring services, both at the customer premises equipment (CPE) and at the central office (CO), when handshake is experienced. An embodiment of the present inventions is directed to significantly reduce the NEXT and/or FEXT interferences due to handshake tones. For example, NEXT and/or FEXT interferences due to G.994.1 handshake tones, identified as, bins 7 and 9 for the Upstream channel and bins 12, 14 and 64 for the Downstream channel may be reduced. An embodiment of the present inventions provides an algorithm that may be used for both NEXT and FEXT Handshake Interferences reduction at the CO and at the CPE. In addition, the algorithm may operate in the time domain and in the frequency domain.Type: GrantFiled: September 29, 2003Date of Patent: July 27, 2010Assignee: Ikanos Communications, Inc.Inventors: Ehud Langberg, Patrick Duvaut, Peter Kleewein, Wolfgang Kleewein, legal representative, Laurent Pierrugues
-
Publication number: 20100017678Abstract: A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.Type: ApplicationFiled: September 24, 2009Publication date: January 21, 2010Inventors: Julien Pons, Patrick Duvaut, Oliver Moreno, Laurent Pierrugues
-
Patent number: 7613985Abstract: A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.Type: GrantFiled: October 22, 2004Date of Patent: November 3, 2009Assignee: Ikanos Communications, Inc.Inventors: Julien Pons, Patrick Duvaut, Oliver Moreno, Laurent Pierrugues
-
Patent number: 7406126Abstract: Various embodiments for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules. Other embodiments may further comprise determining features of upstream transmission.Type: GrantFiled: November 18, 2003Date of Patent: July 29, 2008Assignee: Brooktree Broadband Holding, Inc.Inventors: Patrick Duvaut, Ehud Langberg, Lujing Cai, Laurent Pierrugues, William Scholtz, Oliver Moreno, Feng Ouyang, Massimo Sorbara
-
Patent number: 7397860Abstract: A method and system for reducing the power to average ratio (PAR) at the transmitter and after the up sampling and interpolation filter. In the time domain, Fractional Local Peak Detection and Mitigation (FLPDM) locally (i.e. in the neighborhood where the high peak occur) detects the high peaks at a sampling rate of T/K and combines an optimal binary and a PAR-lowering sequence at the scale of one extended symbol for multi-carrier modulation and at the scale M of symbols for single-carrier modulation. Since the technique acts locally, FLPDM does not require peaks search and processing at the scale of many time samples, does not require iterative Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) processing and it assures tunable millions of instruction per second (MIPS) performance.Type: GrantFiled: October 4, 2002Date of Patent: July 8, 2008Assignee: Brooktree Broadband Holding, Inc.Inventors: Patrick Duvaut, Laurent Pierrugues, Peter Kleewein
-
Patent number: 7136423Abstract: A method and system for reducing the power to average ratio (PAR) at the transmitter after the up sampling and interpolation filter. In the time domain, Side Tone Packets Injection (STPI) system and method detects the optimal peaks that will result in having a low PAR at a sampling rate of T/K and combines an optimal binary and a PAR-lowering sequence and an upsampled, interpolated original discrete time signal at the scale of one extended symbol for multi-carrier modulation and at the scale M of symbols for single-carrier modulation. STPI does not require peaks search and processing at the scale of many time samples, does not require iterative Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) processing thus, allowing the receiver not to perform extra demodulation.Type: GrantFiled: October 4, 2002Date of Patent: November 14, 2006Assignee: Conexant, Inc.Inventors: Patrick Duvaut, Laurent Pierrugues
-
Patent number: 7103097Abstract: A system and method for reducing peak-to-average ratio (PAR) values in signal transmission systems is presented. The presented approach divides a plurality of symbols into a number of non-overlapping subsets of symbols, and manipulates each of the non-overlapping subsets of symbols to produce a plurality of sub-sequences. A strategic manipulation of the subsets of symbols results in the reduction of PAR values.Type: GrantFiled: August 20, 2002Date of Patent: September 5, 2006Assignee: Conexant, Inc.Inventors: Patrick Duvaut, Laurent Pierrugues
-
Patent number: 7068592Abstract: A system and method for increasing payload in a data transmission system. In architecture, the system comprises a modulation device configured to modulate data bins to produce bin-clusters, a mechanism to load the bin-clusters with data, a transmitter configured to transmit the loaded bin-clusters, a receiver configured to receive the transmitted bin-clusters, and a demodulation device configured to extract data from the received bin-clusters. The method steps comprise the steps of modulating data bins to produce bin-clusters, loading the bin-clusters with data, transmitting the loaded bin-clusters, receiving the transmitted bin-clusters, and extracting data from the received bin-clusters.Type: GrantFiled: November 29, 2001Date of Patent: June 27, 2006Assignee: Conexant, Inc.Inventors: Patrick Duvaut, William E. Keasler, Laurent Pierrugues
-
Patent number: 6999504Abstract: A method and apparatus are disclosed for reducing crosstalk in a telecommunication system. Broadly, the present invention utilizes a common mode signal to obtain additional information that can be used to better approximate the transmitted signal (by approximating and canceling crosstalk or otherwise). In accordance with one embodiment of the invention, a modem is provided having improved crosstalk cancellation circuitry for canceling crosstalk received on a local loop (or otherwise estimating the remotely transmitted signal) carrying modem communications. The modem includes a first input for receiving a signal carried on the local loop and a second input for receiving a signal obtained from the common mode. The modem further includes processing circuitry configured to either reduce crosstalk present in the signal carried on the local loop, or to otherwise closely approximate the remotely transmitted signal.Type: GrantFiled: March 15, 2001Date of Patent: February 14, 2006Assignee: GlobespanVirata, Inc.Inventors: Daniel Amrany, Patrick Duvaut, William Keasler, Laurent Pierrugues
-
Publication number: 20050111565Abstract: A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.Type: ApplicationFiled: October 22, 2004Publication date: May 26, 2005Inventors: Julien Pons, Patrick Duvaut, Oliver Moreno, Laurent Pierrugues
-
Patent number: 6829251Abstract: Systems and methods for increasing data capacity in communication systems is presented. In one embodiment, line characteristics are determined, and a downstream bandwidth is adaptively allocated in response to the determined line characteristics. In this regard, the upstream and downstream bandwidths may be seen as adaptively changing as a function of line characteristics.Type: GrantFiled: December 10, 2002Date of Patent: December 7, 2004Assignee: Globespanvirata, IncInventors: Patrick Duvaut, Ehud Langberg, William Scholtz, Laurent Pierrugues, Oliver Moreno
-
Publication number: 20040202239Abstract: An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules.Type: ApplicationFiled: November 18, 2003Publication date: October 14, 2004Applicant: Globespan Virata IncorporatedInventors: Patrick Duvaut, Ehud Langberg, Lujing Cai, Laurent Pierrugues, William Scholtz, Oliver Moreno, Feng Ouyang
-
Publication number: 20040114677Abstract: A method and system of the present inventions reduces both NEXT and FEXT interferences due to handshake tones into upstream and downstream neighboring services, both at the CPE and at the CO, when handshake is experienced. An embodiment of the present inventions is directed to significantly reduce the NEXT and/or FEXT interferences due to handshake tones. For example, NEXT and/or FEXT interferences due to G.994.1 handshake tones, identified as, bins 7 and 9 for the Upstream channel and bins 12, 14 and 64 for the Downstream channel may be reduced. An embodiment of the present inventions provides an algorithm that may be used for both NEXT and FEXT Handshake Interferences reduction at the CO and at the CPE. In addition, the algorithm may operate in the time domain and in the frequency domain. Frequency domain algorithm offers two options, both versions taking advantage of the high correlation time of the Handshake tone signals.Type: ApplicationFiled: September 29, 2003Publication date: June 17, 2004Inventors: Ehud Langberg, Patrick Duvaut, Peter Kleewein, Wolfgang Kleewein, Laurent Pierrugues
-
Publication number: 20040114678Abstract: A method and system of the present inventions reduces both NEXT and FEXT interferences due to handshake tones into upstream and downstream neighboring services, both at the CPE and at the CO, when handshake is experienced. An embodiment of the present inventions is directed to significantly reduce the NEXT and/or FEXT interferences due to handshake tones. For example, NEXT and/or FEXT interferences due to G.994.1 handshake tones, identified as, bins 7 and 9 for the Upstream channel and bins 12, 14 and 64 for the Downstream channel may be reduced. An embodiment of the present inventions provides an algorithm that may be used for both NEXT and FEXT Handshake Interferences reduction at the CO and at the CPE. In addition, the algorithm may operate in the time domain and in the frequency domain. Frequency domain algorithm offers two options, both versions taking advantage of the high correlation time of the Handshake tone signals.Type: ApplicationFiled: September 29, 2003Publication date: June 17, 2004Inventors: Ehud Langberg, Patrick Duvaut, Peter Kleewein, Wolfgang Kleewein, Laurent Pierrugues
-
Publication number: 20030179622Abstract: This invention provides approaches for dual-modulation tuning in systems that exhibit self-disturbance. In one embodiment, a dual-bit-mapping scheme is used so that system parameters are set according to one bit-mapping scheme when self-disturbance is present and to another bit-mapping scheme when self-disturbance is not present in the system. Self-disturbance may include signals that arise from echoes or near-end cross-talk (NEXT).Type: ApplicationFiled: February 21, 2003Publication date: September 25, 2003Inventors: Ehud Langberg, Peter Kleewein, WingIp Tam, Feng Ouyang, Laurent Pierrugues, Oliver Moreno, Patrick Duvaut
-
Publication number: 20030108065Abstract: Systems and methods for increasing data capacity in communication systems is presented. In one embodiment, line characteristics are determined, and a downstream bandwidth is adaptively allocated in response to the determined line characteristics. In this regard, the upstream and downstream bandwidths may be seen as adaptively changing as a function of line characteristics.Type: ApplicationFiled: December 10, 2002Publication date: June 12, 2003Inventors: Patrick Duvaut, Ehud Langberg, William Scholtz, Laurent Pierrugues, Oliver Moreno