Stephen C Pollmann

US Patent:

6597733, Jul 22, 2003

Filed:

Mar 5, 2001

Appl. No.:

09/800268

Inventors:

Stephen C. Pollmann - Santee CA
Eli Arviv - Modiein, IL
Jacques Behar - San Diego CA
Timothy L. Gallagher - Encinitas CA
David Gazelle - Givaat Shemuel, IL
Frederick W. Price - Carlsbad CA

Assignee:

Ensemble Communications, Inc. - San Diego CA

International Classification:

H04B 138

US Classification:

375222, 375231, 375232

Abstract:

A system and method for enhancing the performance of an equalizer in a modem. Multiple techniques are disclosed which improve the modem performance. A first technique uses stored parameters for each burst from each remote site to demodulate a received data stream. A second technique compensates for the gain droop caused by storing parameters across each burst. A third technique minimizes errors caused by adapting the equalizer coefficients for each data burst by analyzing the SN ratio and error rate of the received burst. A fourth technique improves the convergence of the equalizer by using a two-part preamble, whereby both parts are transmitted using different modulation techniques. A fifth technique is provided which performs a soft reset of the modem without performing a complete reset of the modem. A sixth technique determines a modem adaptation factor based on the expected modulation type of an incoming burst transmission. A seventh technique calculates a phase correction value for the stored tap values and applies the value to the incoming signal.

US Patent:

6944188, Sep 13, 2005

Filed:

Feb 21, 2001

Appl. No.:

09/790443

Inventors:

Pranesh Sinha - San Diego CA, US
Sharon Akler - Kfar-Saba, IL
Yair Bourlas - San Diego CA, US
Timothy Leo Gallagher - Encinitas CA, US
Sheldon L. Gilbert - San Diego CA, US
Stephen C. Pollmann - Santee CA, US
Frederick W. Price - Carlsbad CA, US
Blaine C. Readler - San Diego CA, US
John Wiss - Carlsbad CA, US
Ell Arviv - Modiein, IL

Assignee:

Wi-Lan, Inc. - Alberta

International Classification:

H04J003/06
H04Q007/00
H04L012/28
H04B001/38
G06F015/16

US Classification:

370503, 370350, 370328, 370400, 709203, 375222

Abstract:

Apparatus, system and method for synchronizing one or more clocks across a communication link. A slave clock may be synchronized to a master clock by means of a synchronization signal sent from the master to the slave clock side of the link. The synchronization signal may be an expected signal pattern sent at intervals expected by the slave side. The slave clock may correlate received signals with a representation of the expected synchronization signal to produce a correlation sample sequence at a first sample rate which is related as n times the slave clock rate. The synchronization signal receipt time indicated by the correlation sample sequence may be refined by interpolating the correlation sample sequence around a best correlation sample to locate a best interpolation at an interpolation resolution smaller than the sample resolution. The best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output. The synchronization signal receipt time thus determined is compared to the expected time based upon the slave clock, which is adjusted until the times match.

US Patent:

7577100, Aug 18, 2009

Filed:

Jul 26, 2002

Appl. No.:

10/207661

Inventors:

Stephen Pollmann - Santee CA, US
Kenneth Stanwood - Carlsbad CA, US
David Gazelle - San Diego CA, US

International Classification:

G01R 31/08
H04B 7/212
H04J 3/16

US Classification:

370252, 370328, 370465

Abstract:

The system and method optimizes a SNR calculation for a signal received during a downlink burst even in the absence of a node's preferred modulation. This system and method are used in communication systems that include a multi-modulation modem. An adaptation factor is selected whereby its use during portions of the downlink burst, which were not modulated using the preferred modulation, provides the SNR. The selected adaptation factor is used by an equalizer to perform channel inversion to the signal. The system and method can be used in, for example, an FDD or TDD communication system. Such communication systems can be, for example, symmetric, asymmetric, and/or adaptive in their operation.

US Patent:

7583705, Sep 1, 2009

Filed:

Jun 29, 2005

Appl. No.:

11/170391

Inventors:

Pranesh Sinha - San Diego CA, US
Sharon Akler - Kfar-Saba, IL
Yair Bourlas - San Diego CA, US
Timothy Leo Gallagher - Encinitas CA, US
Sheldon L. Gilbert - San Diego CA, US
Stephen C. Pollmann - Santee CA, US
Frederick W. Price - Carlsbad CA, US
Blaine C. Readler - San Diego CA, US
John Wiss - Carlsbad CA, US
Eli Arviv - Modiein, IL

Assignee:

Wi-LAN, Inc. - Ottawa, Ontario

International Classification:

H04J 3/06
H04B 1/38
H04W 4/00

US Classification:

370503, 370328, 370518, 375222

Abstract:

One or more clocks are synchronized across a communication link using a synchronization signal sent from a master to a slave clock. The synchronization signal may be an expected signal pattern sent at intervals expected by the slave. The slave clock may correlate received signals with a representation of the expected synchronization signal to produce a correlation sample sequence at a first sample rate. The synchronization signal receipt time is compared to the expected time and the slave clock is adjusted until the times match. Master and slave clocks synchronized across the communication link constitute a noncommon clock which may be compared on each side of the link to secondary independent clocks. The secondary independent clocks may be separately synchronized by adjusting one to have the same difference from its local noncommon clock as the secondary clock on the other side of the link has from its local noncommon clock.

US Patent:

RE42021, Jan 4, 2011

Filed:

Jul 20, 2005

Appl. No.:

11/187034

Inventors:

Stephen C. Pollmann - Santee CA, US
Eli Arviv - Modiein, 71700, IL
Jacques Behar - San Diego CA, US
Timothy L. Gallagher - Encinitas CA, US
David Gazelle - Givaat Shemuel, IL
Frederick W. Price - Encinitas CA, US

International Classification:

H04B 1/38
H03H 7/30
H03K 5/159

US Classification:

375222, 375231, 375232

Abstract:

A system and method for enhancing the performance of an equalizer in a modem. Multiple techniques are disclosed which improve the modem performance. A first technique uses stored parameters for each burst from each remote site to demodulate a received data stream. A second technique compensates for the gain droop caused by storing parameters across each burst. A third technique minimizes errors caused by adapting the equalizer coefficients for each data burst by analyzing the SN ratio and error rate of the received burst. A fourth technique improves the convergence of the equalizer by using a two-part preamble, whereby both parts are transmitted using different modulation techniques. A fifth technique is provided which performs a soft reset of the modem without performing a complete reset of the modem. A sixth technique determines a modem adaptation factor based on the expected modulation type of an incoming burst transmission. A seventh technique calculates a phase correction value for the stored tap values and applies the value to the incoming signal.

US Patent:

RE42225, Mar 15, 2011

Filed:

May 4, 2006

Appl. No.:

11/429637

Inventors:

Kenneth L. Stanwood - Vista CA, US
Moti Kabelly - Hod Hasharon, IL
Jacques Behar - San Diego CA, US
Yossi Keren - Caesara, IL
Stephen C. Pollmann - Santee CA, US
David Gazelle - Kfar Netter, IL

Assignee:

Harington Valve, LLC - Los Altos CA

International Classification:

H04W 88/00
H04W 4/00
H04M 1/00

US Classification:

455517, 4554262, 4555541, 4555542, 455 301, 4554521, 455 6711, 370280, 370328, 370338, 375222

Abstract:

A system that provides a wireless broadband connection between base stations and customer sites is described. The system includes indoor units within the base stations and customer sites and communicate across cables to outdoor units. The indoor units link to routers, switches and other devices and services. The outdoor units transmit and receive wireless data and send it to the indoor units. The indoor units control the timing of detector measurements in the outdoor unit by transmitting a regular, repeating control message at a predetermined time. Once the outdoor unit receives the control message, it samples its detectors and reports measurements back to the indoor unit.

US Patent:

7907640, Mar 15, 2011

Filed:

Jul 23, 2009

Appl. No.:

12/508431

Inventors:

Pranesh Sinha - San Diego CA, US
Sharon Akler - Kfar-Saba, IL
Yair Bourlas - San Diego CA, US
Timothy Leo Gallagher - Encinitas CA, US
Sheldon L. Gilbert - San Diego CA, US
Stephen C. Pollmann - Santee CA, US
Frederick W. Price - Carlsbad CA, US
Blaine C. Readler - San Diego CA, US
John Wiss - Carlsbad CA, US
Eli Arviv - Modiein, IL

Assignee:

Wi-LAN, Inc. - Ottawa

International Classification:

H04J 3/16
H04J 3/06
H04L 7/00

US Classification:

370518, 370503, 375356

Abstract:

A slave clock may be synchronized to a master clock by means of a synchronization signal sent from the master to the slave clock side of the link. The synchronization signal may be an expected signal pattern sent at intervals expected by the slave side. The slave clock may correlate received signals with a representation of the expected synchronization signal to produce a correlation sample sequence at a first sample rate which is related as n times the slave clock rate. A best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output. The synchronization signal receipt time thus determined is compared to the expected time based upon the slave clock, which is adjusted until the times match. The best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output.

US Patent:

8199779, Jun 12, 2012

Filed:

Feb 4, 2011

Appl. No.:

13/021627

Inventors:

Pranesh Sinha - San Diego CA, US
Sharon Akler - Kfar-Saba, IL
Yair Bourlas - San Diego CA, US
Timothy Leo Gallagher - Encinitas CA, US
Sheldon L. Gilbert - San Diego CA, US
Stephen C. Pollmann - Santee CA, US
Frederick W. Price - Carlsbad CA, US
Blaine C. Readler - San Diego CA, US
John Wiss - Carlsbad CA, US
Eli Arviv - Modiein, IL

Assignee:

Wi-LAN, Inc. - Ottawa

International Classification:

H04J 3/16
G06F 15/16
H04B 1/38

US Classification:

370503, 709209, 375222

Abstract:

Apparatus, system and method for synchronizing one or more clocks across a communication link. A slave clock may be synchronized to a master clock by means of a synchronization signal sent from the master to the slave clock side of the link. The synchronization signal may be an expected signal pattern sent at intervals expected by the slave side. The slave clock may correlate received signals with a representation of the expected synchronization signal to produce a correlation sample sequence at a first sample rate which is related as n times the slave clock rate. The synchronization signal receipt time indicated by the correlation sample sequence may be refined by interpolating the correlation sample sequence around a best correlation sample to locate a best interpolation at an interpolation resolution smaller than the sample resolution. The best interpolation may in turn be further refined by estimating between interpolator outputs adjacent to the best interpolation output. The synchronization signal receipt time thus determined is compared to the expected time based upon the slave clock, which is adjusted until the times match.