Rafael G Martinez

US Patent:

6535589, Mar 18, 2003

Filed:

Sep 13, 1999

Appl. No.:

09/395020

Inventors:

Keith R. Nauman - Treasure Island FL
Ed Thoenes - St. Petersburg FL
Rafael Martinez - Clearwater FL

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04M 1100

US Classification:

379 9333, 379 9308

Abstract:

The present invention provides a method and apparatus for reducing the number of bit errors that occur in xDSL data transmissions as a result of baseband ringing. It has been determined that the number of bit errors that occur in xDSL data transmissions as a result of baseband ringing can be reduced by lowering the data transmission rate to a predetermined rate while baseband ringing is occurring. The apparatus of the present invention detects when baseband ringing is occurring over a communication system and causes the data communication equipment (DCE) device located at the central office and the DCE located at the customer premises to begin communicating at a lower, predetermined transmission data rate. When a determination is made by the apparatus that the baseband ringing is no longer present, the apparatus causes the DCE located at the central office and the DCE located at the customer premises to begin communicating at the original data transmission rate. This temporary rate reduction results in an increased operating margin during, and slightly beyond, the time interval in which baseband ringing is occurring.

US Patent:

6775355, Aug 10, 2004

Filed:

Dec 27, 2000

Appl. No.:

09/748902

Inventors:

Thomas J. Bingel - Belleair Beach FL
Gordon Bremer - Clearwater FL
Rafael S. Martinez - Clearwater FL

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04M 322

US Classification:

379 7, 379 2203, 379 31, 379 35

Abstract:

The eavesdropping prevention system and method of the present invention provides a mask signal generator which generates a mask signal superimposed over a leakage signal. The mask signal prevents meaningful detection and amplification of the leakage signal. The amplitude of the mask signal is low enough so as not to interfere with the transmission of analog POTS signals over the communication line on which the mask signal is superimposed. In the preferred embodiment, the amplitude of the mask signal exceeds the amplitude of any anticipated leakage signals which may be manifested on the communication line. Alternative embodiments of a mask signal are described.

US Patent:

6782096, Aug 24, 2004

Filed:

Nov 12, 1999

Appl. No.:

09/439933

Inventors:

Gordon Bremer - Clearwater FL
Chuck Coston - Seminole FL
Ed Thoenes - Largo FL
William L. Betts - St. Petersburg FL
Thomas J. Bingel - Belleair Beach FL
Rafael Martinez - Clearwater FL

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04M 100

US Classification:

37939901, 379400, 379401, 379404, 379398, 379 103, 375229, 375230

Abstract:

A subscriber line driver (SLD) is provided for the continuous and automatic transformation of the characteristics of a communication system signal so that the signal conforms to a power spectral distribution (PSD) standard. The signal is transformed by the SLD which may increase (amplify) portions of the signal to a predefined specification, decrease (attenuate) portions of the signal to a predefined specification, and/or frequency modulate or filter the transmit signal frequencies to fit within the communication channel frequency bandwidth as defined by a predefined frequency band. After modification by the SLD, the transformed communication signal is injected (transmitted) into a communication transmission line. An SLD device can be employed in a variety of communication systems such as a public telephony system, a private branch exchange (PBX), a coaxial cable system, a fiber optic system, a microwave system, a radio communication system or the like. In the preferred embodiment, the SLD device operates in connection with a telephony system local loop which is operated as a digital subscriber loop (DSL).

US Patent:

6853695, Feb 8, 2005

Filed:

Sep 12, 2000

Appl. No.:

09/660346

Inventors:

William Lewis Betts - St. Petersburg FL, US
Rafael Martinez - Clearwater FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04L025/00
H04L025/40
H04L007/00

US Classification:

375371, 375372, 375373, 375374, 375375, 375376, 375222, 375229, 375230, 375231, 375232, 375233, 375234

Abstract:

A symbol timing derivation system derives receiver timing from received symbols which avoids the need for a pilot tone, thereby reducing power consumption and expanding usable bandwidth. The system is implemented by using a calculation that finds the timing phase error. The timing phase error is then averaged and controls a phase locked loop (PLL). This PLL in turn controls a voltage-controlled oscillator, which handles the modem receiver timing. A centroid calculation can be included to bias the voltage-controlled oscillator to push the equalizer coefficients back to the ideal position. The system can be implemented in either a point-to-point modem environment or a multi-point environment, for example, but not limited to, MVL or DMT. The voltage-controlled oscillator may also be implemented to control transmitter timing, so that the central office modem and the remote modem will operate more-or-less synchronously, reducing the need for large equalizer corrections at either end.

US Patent:

7031381, Apr 18, 2006

Filed:

Aug 15, 2000

Appl. No.:

09/638924

Inventors:

William Lewis Betts - St. Petersburg FL, US
Rafael Martinez - Clearwater FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04B 17/00
H04Q 1/20

US Classification:

375225, 375226, 375227, 375228

Abstract:

A transient pre-emptor includes a processor configured to detect transients in a communications system. After the processor detects a transient in the communications system, it causes a data communications equipment to suspend or reduce data transmission during the occurrence of a subsequent transient.

US Patent:

7046798, May 16, 2006

Filed:

Sep 3, 2003

Appl. No.:

10/654718

Inventors:

William L. Betts - St. Petersburg FL, US
Gordon F. Bremer - Largo FL, US
Rafael S. Martinez - Clearwater FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04B 1/56
H04M 1/74

US Classification:

379417, 370201, 370280, 370286

Abstract:

The present invention provides methods and apparatus for transmitting a data-bearing signal and a non-data-bearing signal. One embodiment comprises communicatively coupling a data-bearing signal during a first time period and communicatively coupling a non-data-bearing signal during a second time period. The data-bearing signal has a first PSD. The non-data-bearing signal has a second PSD substantially the same as the first over a range of frequencies. The non-data-bearing signal has characteristics facilitating echo cancellation. Another embodiment comprises a line interface and a transmitter coupled to the line interface, comprising a data encoder and a periodic signal generator. The encoder is configured to produce a data-bearing signal with a first PSD. The periodic signal generator is configured to produce a non-data-bearing signal with a second PSD. The second PSD is substantially the same as the first PSD over a first range of frequencies.

US Patent:

7058833, Jun 6, 2006

Filed:

Jan 18, 2001

Appl. No.:

09/765223

Inventors:

Gordon Bremer - Clearwater FL, US
Thomas Bingel - Belleair Beach FL, US
Chuck Coston - Largo FL, US
Rafael Martinez - Clearwater FL, US

Assignee:

Paradyne Corp. - Largo FL

International Classification:

G06F 1/32

US Classification:

713324, 713320, 713323

Abstract:

The present invention provides for a system and method for reducing power consumption in frame and cell data transmission systems. A transmitter power manager powers down (turns off) selected elements of a transmitter system during periods of transmitter inactivity. The transmitter power manager system detects incoming communication signals which are to be transmitted by the transmitter, and at the appropriate time, powers up (turns on) the selected elements which are controlled by the transmitter power manager.

US Patent:

7248662, Jul 24, 2007

Filed:

Feb 4, 2005

Appl. No.:

11/051440

Inventors:

William Lewis Betts - St. Petersburg FL, US
Rafael Martinez - Clearwater FL, US

Assignee:

Paradyne Corporation - Largo FL

International Classification:

H04L 7/00
H04L 25/00
H04L 25/40

US Classification:

375371, 375233, 375373, 375376

Abstract:

A symbol timing derivation system derives receiver timing from received symbols which avoids the need for a pilot tone, thereby reducing power consumption and expanding usable bandwidth. The system is implemented by using a calculation that finds the timing phase error. The timing phase error is then averaged and controls a phase locked loop (PLL). This PLL in turn controls a voltage-controlled oscillator, which handles the modem receiver timing. A centroid calculation can be included to bias the voltage-controlled oscillator to push the equalizer coefficients back to the ideal position. The system can be implemented in either a point-to-point modem environment or a multi-point environment, for example, but not limited to, MVL or DMT. The voltage-controlled oscillator may also be implemented to control transmitter timing, so that the central office modem and the remote modem will operate more-or-less synchronously, reducing the need for large equalizer corrections at either end.

Author:

Rafael Urias Martinez

ISBN #:

8496152685

Author:

Rafael V. Martinez

ISBN #:

0377040118

Author:

Rafael Banon Martinez

ISBN #:

0880339594

Author:

Rafael Banon Martinez

ISBN #:

8473511344

Author:

Rafael Banon Martinez

ISBN #:

8486963060

Author:

Rafael Banon Martinez

ISBN #:

8495687410

Author:

Rafael Cuevas Martinez

ISBN #:

8425514738

Author:

Rafael Cuevas Martinez

ISBN #:

8425515912