Inphi Corporation

Clariphy Communications, Inc.

Alfredo Javier Taddei

Oscar Ernesto Agazzi

Mario Rafael Hueda

Diego Ernesto Crivelli

Hugo Santiago Carrer

Martin Ignacio Del Barco

Elvio Adrian Serrano

Norman L Swenson

Martin Serra

Damian Alfonso Morero

Vadim Gutnik

Paul Voois

Ramiro Rogelio Lopez

Jorge Manuel Finochietto

Matias German Schnidrig

Mauro Marcelo Bruni

Federico Nicolas Paredes

Martin Carlos Asinari

Facundo Abel Alcides Ramos

Pablo Gustavo Quiroga

Roman Antonio Arenas

Alejandro Javier Schwoykoski

Pablo Gianni

Ariel Pola

Ramiro Matteoda

Mario Alejandro Castrillon

Adrián Ulises Morales

María Laura Ferster

Thomas A Lindsay

Shih Cheng Wang

Jinwoo Cho

Daniel A Tauber

Laura Maria Ferster

Cesar Sanchez Peñak

Alejandro Castrillon

Maria Laura Ferster

Ulises Morales

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.

Coherent transceiver architecture

A receiver for fiber optic communications.

High-speed optical communications system

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 at 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.

A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Reset in a receiver using center of gravity of equalizer coefficients

Skew compensation based on equalizer coefficients

Growing community of inventors

Cordoba, Argentina

Alfredo Javier Taddei