Zoran A Maricevic

US Patent:

6809613, Oct 26, 2004

Filed:

Dec 30, 2002

Appl. No.:

10/335563

Inventors:

Antonije R. Djordjevic - Belgrade, YU
Aleksandra Stekovic - Belgrade, YU
Marcel F. C. Schemmann - Maria-Hoop, NL
Zoran Maricevic - Manlius NY

Assignee:

Teradvance Communications, LLC - Fayetteville NY

International Classification:

H03H 706

US Classification:

333167, 333172

Abstract:

A transmission line filter having low reflectivity and Gaussian characteristics includes at least one inductive element aligned along the transmission line and at least one shunt configuration branching off the transmission line including a capacitive element and a resistive element. The transmission line filter is embodied in complete and incomplete Gaussian filters, and in both lumped element and distributed-element configurations. A method of designing a transmission line filter having low reflectivity and Gaussian characteristics is provided in which values for desired filter parameters are ascertained, formulas for the values of the inductive, capacitive and resistive elements are derived in terms of the desired filter parameters and the number of half-cells, a number of half-cells for the filter required to achieve the desired filter parameters is selected, and lumped element values for the inductive, capacitive, and resistive elements are estimated using the selected number of half-cells.

US Patent:

7082268, Jul 25, 2006

Filed:

Nov 16, 2001

Appl. No.:

09/998578

Inventors:

Marcel F. C. Schemmann - Maria-Hoop, NL
Zoran Maricevic - Manlius NY, US
Bogdan Hoanca - Anchorage AK, US

Assignee:

Teradvance Communications, LLC - Fayetteville NY

International Classification:

H04B 10/00

US Classification:

398158, 398 81, 398 82, 398 83, 398147, 398152, 398149, 398159, 398 65, 398161, 398202, 398203, 398208, 398214, 385 11, 385 24, 385 27, 385122, 385 31

Abstract:

Optical transmitter/receivers for use in a DWDM systems are provided. Transmission of data signals in a quadrature-return-to-zero (QRZ) format achieves a data transmission rate equal to eight times a base data rate, i. e. , 80 Gbps over a 100 GHz channel if the base data rate is 10 Gbps, with high non-linear performance by setting the polarization state of the data bands such that non-linear effects induced by PMD are reduced. Additionally, a transmitter achieves a transmission data rate equal to 16 times the base data rate by sharpening the QRZ pulses and interleaving pulse-sharpened QRZ data signals in the time domain, further doubling the data rate. Using counterpropagation in the transmitter, carrier signals and data signals traverse the same length of fiber, reducing fringing effects in the transmitter. Related techniques enhance reception and detection of data at high data rates. A local pulse-sharpened carrier is mixed with a QRZ data signal at a detector reducing amplification noise by a factor of two.

US Patent:

7194211, Mar 20, 2007

Filed:

Jun 7, 2006

Appl. No.:

11/449445

Inventors:

Marcel F. C. Schemmann - Maria-Hoop, NL
Zoran Maricevic - Manlius NY, US
Bogdan Hoanca - Anchorage AK, US

Assignee:

Teradvance Communications LLC - Fayetteville NY

International Classification:

H04B 10/04

US Classification:

398183, 398182, 398184, 398185, 398186, 398187, 398188, 398189, 398190, 398191, 398192, 398200, 398201, 375295, 375298

Abstract:

Optical transmitter/receivers for use in a DWDM systems are provided. Transmission of data signals in a quadrature-return-to-zero (QRZ) format achieves a data transmission rate equal to eight times a base data rate, i. e. , 80 Gbps over a 100 GHz channel if the base data rate is 10 Gbps, with high non-linear performance by setting the polarization state of the data bands such that non-linear effects induced by PMD are reduced. Additionally, a transmitter achieves a transmission data rate equal to 16 times the base data rate by sharpening the QRZ pulses and interleaving pulse-sharpened QRZ data signals in the time domain, further doubling the data rate. Using counterpropagation in the transmitter, carrier signals and data signals traverse the same length of fiber, reducing fringing effects in the transmitter. Related techniques enhance reception and detection of data at high data rates. A local pulse-sharpened carrier is mixed with a QRZ data signal at a detector reducing amplification noise by a factor of two.

US Patent:

7474150, Jan 6, 2009

Filed:

May 19, 2004

Appl. No.:

10/847866

Inventors:

Marcel F. Schemmann - Echt, NL
Zoran Maricevic - Manlius NY, US

Assignee:

Broadband Royalty Corporation - Wilmington DE

International Classification:

H03F 1/26

US Classification:

330149, 330310, 330306

Abstract:

In a broadband communication system there are multi-stage power amplifier systems for amplifying the power of radio-frequency (RF) communication signals. Each stage of the amplifier system results in composite triple beat (CTB) distortion, and if the phase of the CTB distortions are approximately the same (i. e. are in-phase), then the amplitudes of the distortions are added (i. e. “20 dB” rule). The amplifier system of the invention includes one or more phase filters positioned in series between the power amplifier stages. The phase filters are adapted to shift the phase of the communication signals, so that the phase of CTB distortions, resulting from the amplification of the communication signals in the amplifier stages between the phase filters, are substantially different (i. e. are out-of-phase). Thus, only the power of the CTB distortions are added (i. e.

US Patent:

7599627, Oct 6, 2009

Filed:

May 31, 2001

Appl. No.:

09/871216

Inventors:

Marcel F. C. Schemmann - Maria-Hoop, NL
Zoran Maricevic - Manlius NY, US
Antonije R. Djordjevic - Belgrade, YU
Darby Racey - Cicero NY, US

Assignee:

Teradvance Communications, LLC - Manlius NY

International Classification:

H04B 10/04

US Classification:

398183, 398147, 398184, 398185, 398188, 398202, 385 24, 385 27, 385 39, 375271, 375302, 375322, 359326

Abstract:

An optical homodyne communication system and method in which a side carrier is transmitted along with data bands in an optical data signal, and upon reception, the side carrier is boosted, shifted to the center of the data bands, and its polarization state is matched to the polarization state of the respective data bands to compensate for polarization mode dispersion during transmission. By shifting a boosted side carrier to the center of the data bands, and by simultaneously compensating for the effects of polarization mode dispersion, the provided system and method simulate the advantages of homodyne reception using a local oscillator. The deleterious effects of chromatic dispersion on the data signals within the data bands are also compensated for by applying a corrective function to the data signals which precisely counteracts the effects of chromatic dispersion.

US Patent:

8103173, Jan 24, 2012

Filed:

Sep 4, 2009

Appl. No.:

12/554241

Inventors:

Marcel F. C. Schemmann - Maria-Hoop, NL
Zoran Maricevic - Manlius NY, US
Antonije R. Djordjevic - Belgrade, YU
Darby Racey - Cicero NY, US

Assignee:

Teradvance Communications, LLC - Manlius NY

International Classification:

H04B 10/04

US Classification:

398183, 398188, 398202, 398147, 398184, 398 81, 398208, 398209, 398203, 385 24, 385 27, 385 39, 375271, 375302, 375322

Abstract:

An optical homodyne communication system and method in which a side carrier is transmitted along with data bands in an optical data signal, and upon reception, the side carrier is boosted, shifted to the center of the data bands, and its polarization state is matched to the polarization state of the respective data bands to compensate for polarization mode dispersion during transmission. By shifting a boosted side carrier to the center of the data bands, and by simultaneously compensating for the effects of polarization mode dispersion, the provided system and method simulate the advantages of homodyne reception using a local oscillator. The deleterious effects of chromatic dispersion on the data signals within the data bands are also compensated for by applying a corrective function to the data signals which precisely counteracts the effects of chromatic dispersion.

US Patent:

8145068, Mar 27, 2012

Filed:

Mar 17, 2009

Appl. No.:

12/406107

Inventors:

Zoran Maricevic - West Hartford CT, US
Eric Cormier - Southington CT, US
Benedict J. Jackson - Beaverton OR, US
Jayesh Bhatt - Windsor CT, US
Marcel F Schemmann - Marea Hoop, NL
Zhijian Sun - Avon CT, US

Assignee:

ARRIS Group, Inc. - Suwanee GA

International Classification:

H04B 10/04

US Classification:

398197, 398195, 398192, 398156, 398 30, 398 33, 398 38

Abstract:

A channel alignment system in an optical communication network includes logic to sample power of a quadrature amplitude modulation (QAM) channel at a component downstream from a QAM modulator. The system determines if the sampled channel power has a sufficient level. The system signals power control logic of the QAM modulator to adjust a gain of the sampled channel.

US Patent:

8515281, Aug 20, 2013

Filed:

Oct 18, 2010

Appl. No.:

12/906612

Inventors:

Zoran Maricevic - West Hartford CT, US

Assignee:

Arris Enterprises, Inc. - Suwanee GA

International Classification:

H04J 14/00
H04J 14/02

US Classification:

398 66, 398 68, 398 71

Abstract:

Methods and systems for providing flexible node segmentation are provided. For example, the system can be configured to delay node segmentation in the headend/hub even though the fiber node has been segmented. When a desire for node segmentation in the headend/hub arises, the receiver can be efficiently upgraded through the use of a control signal to provide a receiver output port to each sub-service area.