Rouben T Toumani

6987851, Jan 17, 2006

Sep 24, 2001

09/962490

Rouben Toumani - San Jose CA, US
Robert A. Blauschild - Los Altos CA, US
Sanjay M. Bhandari - San Jose CA, US
Behrooz Rezvani - San Ramon CA, US
Dale Smith - Fremont CA, US

Ikanos Communication, Inc - Fremont CA

H04M 3/40

37939901, 330297

A high efficiency line driver is disclosed. The line driver may be applied with equal advantage in wired and wireless communication media to amplify data signals with a minimum of power consumption. In an embodiment of the invention a line driver is disclosed which includes: at least one amplifier, a delay element, a control signal generator and a generator. The at least one amplifier includes at least one bias supply, a signal input and a signal output. The delay element accepts as an input the data signal and delays delivery of the data signal to the at least one line amplifier for amplification. The generator is responsive to a control signal to generate varying voltage levels corresponding thereto on the at least one bias supply of the at least one amplifier. The control signal generator is responsive to the input data signal to detect peaks therein and to generate the control signal corresponding thereto in advance of delivery of the data signal to the amplifier.

7092412, Aug 15, 2006

May 14, 2001

09/859182

Behrooz Rezvani - Pleasanton CA, US
Rouben Toumani - San Jose CA, US
Sushil Agrawal - Cupertino CA, US

Ikanos Communications, Inc. - Fremont CA

H04J 3/04
H04L 12/66
G01R 31/08

370536, 370463, 370235, 375219

A method and apparatus for extending existing fiber and local area networks across digital subscriber lines, at matching data rates is disclosed. A DSL transceiver system is disclosed with one or more gateways coupled to at least one digital signal processor (DSP). The DSP in turn couples to a plurality of analog-front-ends (AFE's). Each AFE is coupled via associated hybrid front ends (HFE's) to corresponding subscriber lines. The transceiver or a controller coupled thereto maintains a table of bandwidth requirements and frame types for a variety of sessions. Individual sessions include bandwidth requirements beyond existing XDSL capabilities. The system determines frametype, e. g. 802 and bandwidth requirements, e. g. 100 Mbps for each session and allocates more than one subscriber line accordingly. For each session the divergent bandwidth availability of each of the subscriber lines to which the DSP may be coupled is determined and all or a portion of that bandwidth is allocated to the selected session.

7359444, Apr 15, 2008

Mar 15, 2005

11/081419

Rouben Toumani - San Jose CA, US
Sam Heidari - Menlo Park CA, US

Ikanos Communications, Inc. - Fremont CA

H04L 27/28

375260

An inverse discrete Fourier transform (IDFT) processor processing a lower frequency image of a selected transmit band along with base images of remaining transmit bands called for in a corresponding X-DSL standard. A hybrid upconverter processing the IDFT output by generating a higher frequency replication of the imaged transmit band falling in the standards based frequency range along with the base band images of remaining transmit bands and selectively passing onto the communication medium only images or replications called for by the standards. A hybrid downconverter processing at least one of the received bands at sampling rates below Nyquist thereby creating a lower frequency image within the range of a discrete Fourier transform (DFT) processor. The hybrid downconverter clears the frequency band in which the image processed at sub-Nyquist rates will fold. The DFT then transforms only the images or replications falling within its frequency range.

7443918, Oct 28, 2008

Oct 30, 2007

11/980832

Rouben Toumani - San Jose CA, US
Sam Heidari - Menlo Park CA, US

Ikanos Communications, Inc. - Fremont CA

H04K 1/10

375260

An inverse discrete Fourier transform (IDFT) processor processing a lower frequency image of a selected transmit band along with base images of remaining transmit bands called for in a corresponding X-DSL standard. A hybrid upconverter processing the IDFT output by generating a higher frequency replication of the imaged transmit band falling in the standards based frequency range along with the base band images of remaining transmit bands and selectively passing onto the communication medium only images or replications called for by the standards. A hybrid downconverter processing at least one of the received bands at sampling rates below Nyquist thereby creating a lower frequency image within the range of a discrete Fourier transform (DFT) processor. The hybrid downconverter clears the frequency band in which the image processed at sub-Nyquist rates will fold. The DFT then transforms only the images or replications falling within its frequency range.

7443977, Oct 28, 2008

Nov 3, 2005

11/267652

Rouben Toumani - San Jose CA, US
Robert A. Blauschild - Los Altos CA, US
Sanjay M. Bhandari - San Jose CA, US
Behrooz Rezvani - San Ramon CA, US
Dale Smith - Fremont CA, US

Ikanos Communication, Inc. - Fremont CA

H04M 1/00

37939901

A high efficiency line driver is disclosed. The line driver may be applied with equal advantage in wired and wireless communication media to amplify data signals with a minimum of power consumption. In an embodiment of the invention a line driver is disclosed which includes: at least one amplifier, a delay element, a control signal generator and a generator. The at least one amplifier includes at least one bias supply, a signal input and a signal output. The delay element accepts as an input the data signal and delays delivery of the data signal to the at least one line amplifier for amplification. The generator is responsive to a control signal to generate varying voltage levels corresponding thereto on the at least one bias supply of the at least one amplifier. The control signal generator is responsive to the input data signal to detect peaks therein and to generate the control signal corresponding thereto in advance of delivery of the data signal to the amplifier.

7881362, Feb 1, 2011

Sep 15, 2007

11/901346

Avadhani Shridhar - Santa Clara CA, US
Sam Heidari - Menlo Park CA, US
Rouben Toumani - San Jose CA, US
Ying Wu - Cupertino CA, US

Ikanos Communications, Inc. - Fremont CA

H04B 1/38

375219, 375260

A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2noise margin target less than the 1noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.

57647275, Jun 9, 1998

May 23, 1996

8/652851

Rouben Toumani - Morgan Hill CA
Georg Arnold - Mountain View CA
Brad T. Darnell - San Jose CA

Wiltron Company - Morgan Hill CA

H04M 124
H04J 116

379 27

A metallic access test extender includes an office unit and a remote unit coupled to the office unit via a digital transmission system. A voltage controlled current source is included in the office unit and a voltage controlled voltage source in the remote unit. The voltage controlled current source is responsive to the voltage and current sensed at the remote unit load, and the voltage controlled voltage source is responsive to the voltage and current sensed at the input to the office unit. A shunt admittance which has a high impedance at DC and low frequencies is coupled to the office unit load.

59206098, Jul 6, 1999

May 23, 1996

8/652853

Rouben Toumani - Morgan Hill CA
Paul Bauer - Morgan Hill CA
Brad T. Darnell - San Jose CA
Marco Ruiz - Los Altos CA

Wiltron Company - Morgan Hill CA

H04M 124

379 29

A metallic access test extension system architecture for a digital transmission system is provided. The digital transmission system includes a local end and a plurality of remote ends, each of said plurality of remote ends including a digital communication path and a metallic test pair connection. The local end includes a corresponding digital communication path and corresponding metallic pair connection. The architecture includes a remote unit coupled to each metallic test pair and digital communication path at each of said plurality of remote ends. The remote unit includes a metallic access test extension module. The architecture further includes a central office unit at the local end of the digital communication path, the local end unit including a metallic test extension module and a switch system, responsive to a control signal, for selectively connecting the digital communication paths and metallic test pairs at the local and to the metallic test extension module in the local end unit. In a second embodiment, the test system includes a POTS test system, a special services test system, a metallic test extension local end unit module and a metallic test extension remote unit module. Each remote unit is coupled to a metallic bypass pair line at the remote and to which the digital transmission system may connect any of a plurality of metallic pairs connecting to customers.