Ivan B Djordjevic, Milorad Cvijetic, Lei Xu, Ting Wang: Ultra high-speed optical transmission based on LDPC-coded modulation and coherent detection for all-optical network. NEC Laboratories America, Bao Tran, Joseph Kolodka, July 31, 2012: US08234538 (10 worldwide citation)

An optical communication system includes a bit-interleaved coded modulation (BICM) coder; and a low-density parity-check (LDPC) coder coupled to the BICM coder to generate codes used as component codes and in combination with a coherent detector.

Dayou Qian, Junqiang Hu, Jianjun Yu, Philip Nan Ji, Lei Xu, Ting Wang, Milorad Cvijetic, Toshihiko Kusano: Orthogonal frequency division multiple access (OFDMA) based passive optical network (PON) architecture and its extension to long distance. NEC Laboratories America, NEC Corporation, James Bitetto, Joseph Kolodka, August 16, 2011: US08000604 (6 worldwide citation)

A passive optical network (PON) device, system and method include an optical line terminal (OLT) receiver configured to receive multiple signals at different wavelengths simultaneously and enable multiple transmitters to operate at the same time during one upstream time slot. The optical line termin ...

Ivan B Djordjevic, Lei Xu, Ting Wang, Milorad Cvijetic: GLDPC encoding with Reed-Muller component codes for optical communications. NEC Laboratories America, Joseph Kolodka, February 26, 2013: US08386879 (4 worldwide citation)

A method of encoding for optical transmission of information includes encoding information with a generalized low-density parity-check (GLDPC) code for providing coding gains, and constructing the GLDPC code with a Reed-Muller RM code as a component code, the component code being decodable using a m ...

Yuanqiu Luo, Jianjun Yu, Junqiang Hu, Lei Xu, Philip Nan Ji, Ting Wang, Milorad Cvijetic: WDM passive optical network with parallel signal detection for video and data delivery. NEC Laboratories America, James Bitetto, Joseph Kolodka, September 4, 2012: US08260140 (4 worldwide citation)

An optical network component, architecture and method for a wavelength division multiplexed passive optical network includes a band coupler configured to demultiplex first and second wavelength division multiplexed content transmitted from an optical line terminal into a first band signal and a seco ...

Milorad Cvijetic, Douglas S Burbidge: Optical repeaters for single-and multi-wavelength operation with dispersion equalization. Northern Telecom, Angela C de Wilton, June 29, 1999: US05917635 (4 worldwide citation)

An optical repeater is described which integrates an erbium doped optical fiber amplifier (EDFA) with a dispersion equalizer (DE) based on fiber gratings. The dispersion equalizer is based on parallel connection of two fiber gratings for single carrier wavelength operation, and on parallel connectio ...

Ivan Djordjevic, Ting Wang, Lei Xu, Milorad Cvijetic: Simultaneous PMD compensation and chromatic dispersion compensation using LDPC coded OFDM. NEC Laboratories America, Joseph Kolodka, July 31, 2012: US08234549 (3 worldwide citation)

A method includes estimating quadrature amplitude modulated QAM symbols in an LDPC encoded OFDM signal for transmission, performing channel estimation by training sequence to determine channel coefficients in reception of the LDPC encoded OFDM signal; and obtaining channel information detection and ...

Hussam G Batshon, Ivan B Djordjevic, Lei Xu, Ting Wang, Milorad Cvijetic: Wavelength transmission system and method using 3-dimensional LDPC-coded modulation. NEC Laboratories America, James Bitetto, Joseph Kolodka, August 2, 2011: US07991070 (3 worldwide citation)

A transmitter and method include a LDPC encoder configured to encode source data, and a mapper configured to generate three coordinates in accordance with a 3D signal constellation where the coordinates include an amplitude coordinate and two phase coordinates. A laser source is modulated in accorda ...

Neda Cvijetic, Milorad Cvijetic, Ting Wang: 1 Tb/s converged optical metro-access transmission based on wavelength division multiplexed orthogonal frequency division multiple access passive optical network (WDM-OFDMA-PON). NEC Laboratories America, Joseph Kolodka, April 7, 2015: US09002204 (2 worldwide citation)

A Wavelength Division Multiplexed Orthogonal Frequency Division Multiple Access Passive Optical Network (WDM-OFDMA-PON) includes a passive last-mile optical split terminated by optical network units (ONUs) with OFDMA transceivers; a standard single mode fiber (SSMF) link; a central office optical li ...

Neda Cvijetic, Milorad Cvijetic, Ting Wang: Orthogonal frequency division multiple access time division multiple access-passive optical networks OFDMA TDMA PON architecture for 4G and beyond mobile backhaul. NEC Laboratories America, Joseph Kolodka, November 25, 2014: US08897648 (2 worldwide citation)

Systems and methods are provided for network communication using wireless base stations and an optical orthogonal frequency division multiple access (OFDMA) signal generated on an optical wavelength, with the optical OFDMA signal being composed of a plurality of OFDMA subcarriers. A multi-level modu ...

Neda Cvijetic, Maria Ioanna Angelou, Ankitkumar Patel, Milorad Cvijetic, Philip Nan Ji, Ting Wang: Software-defined optical network. NEC Laboratores America, Joseph Kolodka, September 8, 2015: US09131289 (1 worldwide citation)

A software-defined (SD) optical network is disclosed. An SD optical line terminal (OLT) includes a global SD controller, one or more SD OLT drivers connected to the global SD controller, and an underlying hardware component connected to each of said one or more SD OLT drivers. An SD optical network ...