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1. WO2017180122 - OPTICAL RECEIVERS

Publication Number WO/2017/180122
Publication Date 19.10.2017
International Application No. PCT/US2016/027467
International Filing Date 14.04.2016
IPC
H04B 10/61 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
61Coherent receivers
H04B 10/524 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
516Details of coding or modulation
524Pulse modulation
CPC
H04B 10/5161
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50Transmitters
516Details of coding or modulation
5161Combination of different modulation schemes
H04B 10/63
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
61Coherent receivers
63Homodyne ; , i.e. coherent receivers where the local oscillator is locked in frequency and phase to the carrier signal
H04B 10/6931
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
66Non-coherent receivers, e.g. using direct detection
69Electrical arrangements in the receiver
693Arrangements for optimizing the preamplifier in the receiver
6931Automatic gain control of the preamplifier
H04B 10/695
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
66Non-coherent receivers, e.g. using direct detection
69Electrical arrangements in the receiver
695Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control
H04L 25/4917
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
38Synchronous or start-stop systems, e.g. for Baudot code
40Transmitting circuits; Receiving circuits
49using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; ; Baseband coding techniques specific to data transmission systems
4917using multilevel codes
Applicants
  • HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP [US]/[US]
Inventors
  • LI, Cheng
  • YU, Kunzhi
  • FIORENTINO, Marco
  • BEAUSOLEIL, Raymond G.
Agents
  • MAUGHAN, Eric L.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL RECEIVERS
(FR) RÉCEPTEURS OPTIQUES
Abstract
(EN)
An example optical receiver may have an optical receiver front-end, four slicers, and a logic block. The optical receiver front-end may include a transimpedance amplifier to convert a photodiode output signal to a voltage signal. Three of the slicers may be data slicers, and one of the slicers may be an edge slicer. The slicers may each: shift the voltage signal based on an offset voltage set for the respective slicer, determine whether the shifted voltage signal is greater than a threshold value and generate a number of comparison signals based on the determining, and generate multiple digital signals by demuxing the comparison signals. The logic block may perform PAM-4 to binary decoding based on the data signals output by the data slicers and clock-and-data-recovery based on the digital signals output by the edge slicer.
(FR)
La présente invention concerne un récepteur optique donné à titre d'exemple qui peut présenter une extrémité avant de récepteur optique, quatre éminceurs, et un bloc logique. L'extrémité avant du récepteur optique peut comprendre un amplificateur de transimpédance en vue de convertir un signal de sortie de photodiode en un signal de tension. Trois des éminceurs peuvent être des éminceurs de données, et l'un des éminceurs peut être un éminceur de bord. Les éminceurs peuvent chacun : décaler le signal de tension sur la base d'un ensemble de tension de décalage destiné à l'éminceur respectif, déterminer si le signal de tension décalé est supérieur à une valeur seuil et générer un certain nombre de signaux de comparaison sur la base de la détermination, et générer de multiples signaux numériques en démultiplexant les signaux de comparaison. Le bloc logique peut effectuer un décodage 4-PAM à binaire sur la base des signaux de données émis par les éminceurs de données et de la récupération d'horloge et de données sur la base des signaux numériques émis par l'éminceur de bord.
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