Massimo M Sorbara

Author:

Massimo Sorbara

ISBN #:

0130938106

US Patent:

6952458, Oct 4, 2005

Filed:

Oct 2, 2001

Appl. No.:

09/969323

Inventors:

Igor Djokovich - Irvine CA, US
Patrick Duvaut - Eatontown NJ, US
Massimo Sorbara - Freehold NJ, US

Assignee:

GlobespanVirata, Inc. - Red Bank NJ

International Classification:

H03D001/00

US Classification:

375341, 375253, 375261, 714780, 714796

Abstract:

A demapping system and method for demapping symbols into bits, is provided. An embodiment of the system comprises a processor, and a memory that is coupled to the processor. The memory comprises a memory module that comprises a program that finds a hard demapper output d based on a received symbol r; finds a challenger cfor each i, the challenger cis a challenger of the hard demapper output d, i is an integer whose maximum value is a number of bits of the challenger c; calculates reliability mfor each i, the reliability mis the reliability of the hard demapper output d; and calculates soft bit xfor each i, the soft bit xis calculated based on the reliability m.

US Patent:

6956872, Oct 18, 2005

Filed:

May 22, 2001

Appl. No.:

09/862911

Inventors:

Igor Djokovic - Tustin CA, US
Patrick Duvaut - Eatontown NJ, US
Massimo Sorbara - Freehold NJ, US

Assignee:

GlobespanVirata, Inc. - Red Bank NJ

International Classification:

H04J003/07

US Classification:

370505, 714755

Abstract:

The present invention is generally directed to a system and method for encoding a DSL information bit stream and decoding a corresponding encoded DSL symbol. In accordance with one embodiment, an apparatus for encoding a DSL information bit stream is provided having a switch with an input configured to receive a DSL information bit stream and at least two outputs. An encoder is provided and coupled to a first output of the switch. A serial to parallel converter is provided and coupled to both an output of the encoder and a second output of the switch. Finally, a mapper is provided and coupled to an output of the serial to parallel converter through multiple paths. Preferably, a first coupling path between the serial to parallel converter and the mapper is a direct path and a second coupling path includes a second encoder.

US Patent:

7372899, May 13, 2008

Filed:

Jul 25, 2003

Appl. No.:

10/626771

Inventors:

Patrick Duvaut - Tinton Falls NJ, US
Massimo Sorbara - Freehold NJ, US
Laurent Francis Alloin - Monmouth Beach NJ, US
Wolfgang Kleewein, legal representative - Eatontown NJ, US

Assignee:

Brooktree Broadband Holding, Inc. - Newport Beach CA

International Classification:

H04B 1/38
H04K 1/10
H04J 11/00

US Classification:

375222, 375260, 370210

Abstract:

In an asynchronous digital subscriber line (ADSL) system comprising a central office High Speed ADSL Terminating Unit (HSTU-C) in bi-directional discrete multitone (DMT) communication with a remote High Speed ADSL Terminating Unit (HSTU-R), a method for improving handshake detection is provided by the present invention. The method comprises transmitting handshake signaling from the HSTU-C to the HSTU-R via a first subset of carrier sets at a first symbol rate and transmitting handshake signaling from the HSTU-C to the HSTU-R via a second subset of carrier sets at a second symbol rate, the second symbol rate being less than the first symbol rate.

US Patent:

7406126, Jul 29, 2008

Filed:

Nov 18, 2003

Appl. No.:

10/714655

Inventors:

Patrick Duvaut - Tinton Falls NJ, US
Ehud Langberg - Wayside NJ, US
Lujing Cai - Morganville NJ, US
Laurent Pierrugues - Tinton Falls NJ, US
William Scholtz - Greenbrae CA, US
Oliver Moreno - Paris, FR
Feng Ouyang - Dayton MD, US
Massimo Sorbara - Freehold NJ, US

Assignee:

Brooktree Broadband Holding, Inc. - Newport Beach CA

International Classification:

H04K 1/10
H04L 27/28

US Classification:

375260, 375222

Abstract:

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.

US Patent:

7408999, Aug 5, 2008

Filed:

Dec 9, 2005

Appl. No.:

11/297634

Inventors:

Tao Xue - Irvine CA, US
Fuqiang Shi - Monmouth Junction NJ, US
Massimo Sorbara - Freehold NJ, US
Ho-ming Lin - Irvine CA, US

Assignee:

Conexant Systems, Inc. - Red Bank NJ

International Classification:

H04L 5/12
H03M 13/00

US Classification:

375262, 375265, 714756

Abstract:

The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving—triangular) or near zero delay variation (interleaving—GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective dummy byte insertion scheme for applications that require seamless on-line rate changes, e. g. , SRA (seamless rate adaptation), DRR (dynamic rate repartitioning) and adaptive INP (impulse noise protection).

US Patent:

7466758, Dec 16, 2008

Filed:

Dec 9, 2005

Appl. No.:

11/297632

Inventors:

Tao Xue - Irvine CA, US
Massimo Sorbara - Freehold NJ, US
Ho-Ming Lin - Irvine CA, US

Assignee:

Conexant Systems, Inc. - Newport Beach CA

International Classification:

H04L 5/12
H03M 13/00

US Classification:

375262, 375265, 714756

Abstract:

The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving—triangular) or near zero delay variation (interleaving—GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective dummy byte insertion scheme for applications that require seamless on-line rate changes, e. g. , SRA (seamless rate adaptation), DRR (dynamic rate repartitioning) and adaptive INP (impulse noise protection).

US Patent:

7633999, Dec 15, 2009

Filed:

Jul 25, 2003

Appl. No.:

10/626714

Inventors:

Patrick Duvaut - Tinton Falls NJ, US
Massimo Sorbara - Freehold NJ, US

Assignee:

Ikanos Communications, Inc. - Fremont CA

International Classification:

H04B 1/38

US Classification:

375222

Abstract:

In accordance with one embodiment of the present invention, a power spectral density (PSD) mask for spectral shaping of a dual bit map (DBM) mode downstream transmission is provided. The PSD mask is represented by the equation:.

US Patent:

7660260, Feb 9, 2010

Filed:

Feb 28, 2007

Appl. No.:

11/712125

Inventors:

Patrick Duvaut - Tinton Falls NJ, US
Amitkumar Mahadevan - Eatontown NJ, US
Massimo Sorbara - Freehold NJ, US

Assignee:

Ikanos Communications, Inc. - Fremont CA

International Classification:

H04J 1/16
H04B 1/38

US Classification:

370252, 375222

Abstract:

There is provided a method of shaping PSD (Power Spectrum Density) of an FTTN (Fiber-To-The-Node) downstream signal from a disturber source to achieve spectral compatibility at an FTTN downstream victim with a downstream PSD from a reference source. The method includes receiving the downstream PSD from the reference source. The method further includes receiving an unshaped downstream PSD from the disturber source. The method further includes shaping the PSD of the FTTN downstream signal to have a substantially equivalent FEXT (Far-End Cross-Talk) into the FTTN downstream victim as the downstream PSD from the reference source.