公开(公告)号：US09825711B1

公开(公告)日：2017-11-21

申请号：US15205929

申请日：2016-07-08

Applicant: Inphi Corporation

Inventor： Oscar Ernesto Agazzi ,  Diego Ernesto Crivelli ,  Hugo Santiago Carrer ,  Mario Rafael Hueda ,  Martin Ignacio del Barco ,  Pablo Gianni ,  Ariel Pola ,  Elvio Adrian Serrano ,  Alfredo Javier Taddei ,  Mario Alejandro Castrillon ,  Martin Serra ,  Ramiro Matteoda

IPC: H04B10/00 ,  H04B10/61 ,  H04L7/00 ,  H04L27/01 ,  H04J14/00

CPC classification number: H04B10/6161 ,  H04B10/616 ,  H04L7/0075 ,  H04L27/01

Abstract: A receiver for fiber optic communications.

公开(公告)号：US10715259B1

公开(公告)日：2020-07-14

申请号：US16256637

申请日：2019-01-24

Applicant: INPHI CORPORATION

Inventor： Mario Rafael Hueda ,  José L. Correa Lust ,  Damian Alfonso Morero

IPC: H04B10/61 ,  H04B10/40 ,  H04J14/02

Abstract: A method and structure for compensation techniques in coherent optical receivers. The present invention provides a coherent optical receiver with an improved 8×8 adaptive MIMO (Multiple Input, Multiple Output) equalizer configured within a digital signal processor (DSP) to compensate the effects of transmitter I/Q skew in subcarrier multiplexing (SCM) schemes. The 8×8 MIMO equalizer can be configured such that each of the 8 outputs is electrically coupled to 3 of 8 inputs, wherein each of the input-output couplings is configured as a filter. The method includes compensating for impairments to the digital conversion of an optical input signal via the 8×8 MIMO equalizer following other signal processing steps, such as chromatic dispersion (CD)/polarization-mode dispersion (PMD) compensation, carrier recovery, timing synchronization, and cycle slip correction.

公开(公告)号：US10038506B2

公开(公告)日：2018-07-31

申请号：US15800745

申请日：2017-11-01

Applicant: INPHI CORPORATION

Inventor： Diego Ernesto Crivelli ,  Mario Rafael Hueda ,  Hugo Santiago Carrer ,  Jeffrey Zachan ,  Vadim Gutnik ,  Martin Ignacio Del Barco ,  Ramiro Rogelio Lopez ,  Shih Cheng Wang ,  Geoffrey O. Hatcher ,  Jorge Manuel Finochietto ,  Michael Yeo ,  Andre Chartrand ,  Norman L. Swenson ,  Paul Voois ,  Oscar Ernesto Agazzi

IPC: H04B10/00 ,  H04B10/61 ,  H04B10/40 ,  H04B10/2569 ,  H04J14/00

CPC classification number: H04B10/6162 ,  H04B10/2569 ,  H04B10/40 ,  H04B10/6161

Abstract: A transceiver for fiber optic communications. The transceiver can include a transmitter module having a transmitter host interface configured to receive an input host signal; a transmitter framer configured to frame the input host signal and to generate a framed host signal; and a transmitter coder configured to encode the framed host signal to generate an encoded host signal for transmission over a communication channel. The transceiver can also include a receiver module having a bulk chromatic dispersion, fiber length estimation, and coarse carrier recovery circuit configured to equalize a digital input ingress signal to generate an equalized ingress signal; a receiver framer configured to frame the equalized ingress signal to generate a framed ingress signal; and a receiver host interface configured to output the framed ingress signal. The receiver host interface is compatible with a framing protocol of the receiver framer.

公开(公告)号：US09838140B1

公开(公告)日：2017-12-05

申请号：US15597120

申请日：2017-05-16

Applicant: Inphi Corporation

Inventor： Diego Ernesto Crivelli ,  Mario Rafael Hueda ,  Hugo Santiago Carrer ,  Jeffrey Zachan ,  Vadim Gutnik ,  Martin Ignacio del Barco ,  Ramiro Rogelio Lopez ,  Shih Cheng Wang ,  Geoffrey O. Hatcher ,  Jorge Manuel Finochietto ,  Michael Yeo ,  Andre Chartrand ,  Norman L. Swenson ,  Paul Voois ,  Oscar Ernesto Agazzi

IPC: H04B10/00 ,  H04B10/61 ,  H04B10/2569 ,  H04B10/40 ,  H04J14/00

CPC classification number: H04B10/6162 ,  H04B10/2569 ,  H04B10/40 ,  H04B10/6161

Abstract: A transceiver for fiber optic communications.

公开(公告)号：US10530493B2

公开(公告)日：2020-01-07

申请号：US16212461

申请日：2018-12-06

Applicant: INPHI CORPORATION

Inventor： Mario Rafael Hueda ,  Mauro Marcelo Bruni ,  Federico Nicolas Paredes ,  Hugo Santiago Carrer ,  Diego Ernesto Crivelli ,  Oscar Ernesto Agazzi ,  Norman L. Swenson ,  Seyedmohammadreza Motaghiannezam

IPC: H04B10/61 ,  H04L7/00

Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.

公开(公告)号：US10177851B2

公开(公告)日：2019-01-08

申请号：US15647765

申请日：2017-07-12

Applicant: INPHI CORPORATION

Inventor： Oscar Ernesto Agazzi ,  Diego Ernesto Crivelli ,  Paul Voois ,  Ramiro Rogelio Lopez ,  Jorge Manuel Finochietto ,  Norman L. Swenson ,  Mario Rafael Hueda ,  Hugo Santiago Carrer ,  Vadim Gutnik ,  Adrián Ulises Morales ,  Martin Ignacio Del Barco ,  Martin Carlos Asinari ,  Federico Nicolas Paredes ,  Alfredo Javier Taddei ,  Mauro Marcelo Bruni ,  Damian Alfonso Morero ,  Facundo Abel Alcides Ramos ,  María Laura Ferster ,  Elvio Adrian Serrano ,  Pablo Gustavo Quiroga ,  Roman Antonio Arenas ,  Matias German Schnidrig ,  Alejandro Javier Schwoykoski

IPC: H04B10/00 ,  H04B10/516 ,  H04B10/40 ,  H04B10/61 ,  H04L7/00

Abstract: A coherent receiver comprises an ingress signal path having an ingress line-side interface, and an ingress host-side interface. The ingress signal path is configured to receive an analog signal vector at the ingress line-side interface, to demodulate the analog signal vector, and to output a digital data signal Fat the ingress host-side interface. The coherent receiver also comprises clock and timing circuitry configured to receive a single reference clock signal and to provide a plurality of modified ingress path clock signals to different components of the ingress signal path, the plurality of modified ingress path clock signals derived from the single reference clock signal and the plurality of modified ingress path clock signals having different clock rates. The receiver, transmitter, or transceiver can operate in a plurality of programmable operating modes to accommodate different modulation/de-modulation schemes, error correction code schemes, framing/mapping protocols, or other programmable features.

公开(公告)号：US10164715B2

公开(公告)日：2018-12-25

申请号：US16011470

申请日：2018-06-18

Applicant: INPHI CORPORATION

Inventor： Damian Alfonso Morero ,  Martin Carlos Asinari ,  Martin Ignacio Del Barco ,  Mario Rafael Hueda ,  Lucas Javier Yoaquino

IPC: H04B10/2513 ,  H04L27/06 ,  H04B10/61 ,  H04L25/06

Abstract: An adaptive demapper adaptively demaps an input symbol. An input symbol is received and demapped in a hard-output demapper to generate a current detected symbol corresponding to a constellation point on a current constellation closest to the input symbol. A corrected inverse of a current noise power estimate is determined by updating a previous noise power estimate based on a difference between the input symbol and the current detected symbol. In a soft-output demapper, a log likelihood ratio corresponding to the current detected symbol is determined based on the corrected inverse of the current noise power estimate. The constellation point in the current constellation corresponding to the current detected symbol is then updated to generate an updated constellation based on a difference between the constellation point and the received input symbol.

公开(公告)号：US10110317B1

公开(公告)日：2018-10-23

申请号：US15256210

申请日：2016-09-02

Applicant: INPHI CORPORATION

Inventor： Damian Alfonso Morero ,  Mario Rafael Hueda ,  Shu Hao Fan

IPC: H04B10/06 ,  H04B10/61 ,  H04B10/516 ,  H04L25/03 ,  H04B7/005 ,  H04B7/0413

Abstract: Apparatus and method for compensating for transmitter errors in an optical communication system are provided. In certain configurations herein, a receiver is provided for processing an analog signal vector representing an optical signal received from a transmitter. The receiver includes an analog front-end that converts the analog signal vector into a digital signal vector including a digital representation of an I component and a Q component of the optical signal. The receiver further includes a digital signal processing circuit configured to process the digital signal vector to recover data, and the digital signal processing circuit includes a transmitter error compensation system that compensates the digital signal vector for at least one of a transmit skew error of the transmitter or a modulator biasing error of the transmitter.

公开(公告)号：US10063262B2

公开(公告)日：2018-08-28

申请号：US15000978

申请日：2016-01-19

Applicant: Inphi Corporation

Inventor： Damian Alfonso Morero ,  Mario Alejandro Castrillon ,  Matias German Schnidrig ,  Mario Rafael Hueda

IPC: H03M13/00 ,  H03M13/11

CPC classification number: H03M13/616 ,  H03M13/112 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/6577

Abstract: A decoder performs forward error correction based on quasi-cyclic regular column-partition low density parity check codes. A method for designing the parity check matrix reduces the number of short-cycles of the matrix to increase performance. An adaptive quantization post-processing technique further improves performance by eliminating error floors associated with the decoding. A parallel decoder architecture performs iterative decoding using a parallel pipelined architecture.

公开(公告)号：US10038498B1

公开(公告)日：2018-07-31

申请号：US15256173

申请日：2016-09-02

Applicant: INPHI CORPORATION

Inventor： Shu Hao Fan ,  Damian Alfonso Morero ,  Mario Rafael Hueda

IPC: H04B10/08 ,  H04B10/079 ,  H04B10/50 ,  H04B10/61 ,  H04B10/40 ,  H04L25/03

CPC classification number: H04B10/07955 ,  H04B7/005 ,  H04B7/0413 ,  H04B10/40 ,  H04B10/50 ,  H04B10/5053 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/61 ,  H04B10/616 ,  H04L25/03 ,  H04L25/14

Abstract: Apparatus and method for transmitter alignment in an optical communication system are provided. In certain configurations, a method of correcting for transmitter skew is provided. The method includes generating an optical signal using a transmitter based on an in-phase (I) component and a quadrature-phase (Q) component of a transmit signal, the optical signal having a baud rate that is based on a timing tone. The method further includes receiving the optical signal as an input to a receiver, and generating a signal vector representing the optical signal using the receiver. The signal vector includes an I component and a Q component. The method further includes calculating a power of the timing tone based on processing the signal vector using a tone power calculator of the receiver, and correcting for a skew of the transmitter based on the calculated power.