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1. WO2020186037 - CONSTANT ENVELOPE PATH-DEPENDENT PHASE MODULATION

Publication Number WO/2020/186037
Publication Date 17.09.2020
International Application No. PCT/US2020/022354
International Filing Date 12.03.2020
IPC
H04L 27/20 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
18Phase-modulated carrier systems, i.e. using phase-shift keying
20Modulator circuits; Transmitter circuits
H04B 10/516 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
CPC
H04B 10/505
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
501Structural aspects
503Laser transmitters
505using external modulation
H04B 10/516
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
H04B 10/5561
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
548Phase or frequency modulation
556Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
5561Digital phase modulation
H04L 27/2096
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
18Phase-modulated carrier systems, i.e. using phase-shift keying
20Modulator circuits
2096Arrangements for directly or externally modulating an optical carrier
Applicants
  • RAYTHEON COMPANY [US]/[US]
Inventors
  • KOWALEVICZ, Andrew
  • DOLGIN, Benjamin, P.
  • GRACEFFO, Gary, M.
Agents
  • ANASTASI, John, N.
  • NOE, Keith, F.
Priority Data
16/352,28413.03.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONSTANT ENVELOPE PATH-DEPENDENT PHASE MODULATION
(FR) MODULATION DE PHASE DÉPENDANT DU TRAJET À ENVELOPPE CONSTANTE
Abstract
(EN)
Optical transmitters configured to modulate optical signals with a path-dependent phase modulation scheme. In certain examples, an optical transmitter includes an optical source (450) that emits a carrier waveform, a modulator (460) configured to modulate the carrier waveform according to a path-dependent phase modulation scheme to produce a modulated optical signal, a mapping module (430) configured to map a data payload to the path-dependent phase modulation scheme, each symbol in the path-dependent phase modulation scheme including a concatenation of at least one location bit and a path bit, the at least one location bit identifying an amount of a phase transition in the modulated optical signal and the path bit identifying a direction of the phase transition, and a pulse- shaping filter (440) configured to control the modulator, based on an output from the mapping module, to impose the path-dependent phase modulation scheme on the carrier waveform to generate the modulated optical signal.
(FR)
L'invention concerne des émetteurs optiques configurés pour moduler des signaux optiques selon un schéma de modulation de phase dépendant du trajet. Dans certains exemples, un émetteur optique comprend une source optique (450) qui émet une forme d'onde porteuse, un modulateur (460) configuré pour moduler la forme d'onde porteuse selon un schéma de modulation de phase dépendant du trajet pour produire un signal optique modulé, un module de mappage (430) configuré pour mapper une charge utile de données sur le schéma de modulation de phase dépendant du trajet, chaque symbole du schéma de modulation de phase dépendant du trajet comprenant une concaténation d'au moins un bit de position et d'un bit de trajet, le ou les bits de position identifiant une quantité d'une transition de phase dans le signal optique modulé et le bit de trajet identifiant une direction de la transition de phase, et un filtre de mise en forme d'impulsion (440) configuré pour commander au modulateur, sur la base d'une sortie du module de mappage, d’appliquer le schéma de modulation de phase dépendant du trajet à la forme d'onde porteuse pour générer le signal optique modulé.
Also published as
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