Patents-Review.com
ClassID:

223926 ⎘

H04B10/612 - CPC Classification

Classification description:

Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication; Receivers; Coherent receivers for optical signals modulated with a format different from binary or higher-order PSK [X-PSK], e.g. QAM, DPSK, FSK, MSK, ASK

Recent Application in this class:
#1
20260106673
2026-04-16

COHERENT OPTICAL RECEIVING METHOD AND RECEIVER

 #2
20260088906
2026-03-26

TRANSMISSION METHOD AND RECEPTION METHOD FOR OPTICAL COMMUNICATION, AND CORRESPONDING DEVICE

 #3
20260012265
2026-01-08

FLEXIBLE BAUD RATE

 #4
20250385740
2025-12-18

OPTICAL RECEIVER AND OPTICAL RECEIVING METHOD

 #5
20250309994
2025-10-02

RECONFIGURABLE ADAPTIVE EQUALIZATION AND CARRIER PHASE RECOVERY

 #6
20250279835
2025-09-04

METHODS AND APPARATUSES FOR DUAL POLARIZATION QUADRATURE AMPLITUDE MODULATION TRANSMISSION AND COHERENT RECEPTION

 #7
20250279830
2025-09-04

OPTICAL COMMUNICATION SYSTEM FOR PASSIVE OPTICAL NETWORKS AND HIGH DATA RATE COMMUNICATION

 #8
20250279829
2025-09-04

BIDIRECTIONAL SYSTEM FOR OPTICAL PROCESSING

 #9
20250253947
2025-08-07

METHOD AND SYSTEM FOR BIDIRECTIONAL OPTICAL COMMUNICATION WITH PHASE SHIFTING

 #10
20250219740
2025-07-03

COHERENT RECEPTION OF ON/OFF KEYING AND PULSE POSITION MODULATIONS

 #11
20250175253
2025-05-29

APPARATUS AND METHODS FOR MONITORING OPTICAL NETWORKS

 #12
20250132837
2025-04-24

OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMISSION APPARATUS, OPTICAL TRANSMISSION SYSTEM, FEEDBACK METHOD AND ADJUSTMENT METHOD

 #13
20240421912
2024-12-19

SYSTEMS AND METHODS FOR COHERENT BURST RECEPTION

 #14
20240405870
2024-12-05

Bi-directional optical communication system

 #15
20240388366
2024-11-21

OPTICAL COHERENT RECEIVER ON A CHIP

 #16
20240297720
2024-09-05

COHERENT OPTICAL RECEIVER

 #17
20240178920
2024-05-30

TRANSMISSION METHOD AND RECEPTION METHOD FOR OPTICAL COMMUNICATION, AND CORRESPONDING DEVICE

 #18
20240121009
2024-04-11

WAVEGUIDE DELAY BASED EQUALIZATION WITH CURRENT SUMMING IN A DIFFERENTIAL TRANSIMPEDANCE AMPLIFIER

 #19
20240097782
2024-03-21

Method and system for generating the spectrogram of a signal

 #20
20240056195
2024-02-15

Coefficient update amount output device, coefficient update device, coefficient update amount output method, and recording medium

 #21
20240039639
2024-02-01

FLEXIBLE BAUD RATE

 #22
20230420998
2023-12-28

Wireless Power Systems With Frequency-Shift-Keying Communications

 #23
20230388041
2023-11-30

Clock recovery for digital subcarriers for optical networks

 #24
20230216594
2023-07-06

COHERENT OPTICAL RECEIVER DEVICE AND COHERENT OPTICAL RECEIVING METHOD

 #25
20230179302
2023-06-08

Apparatus and methods for monitoring optical networks

 #26
20230135594
2023-05-04

Clock recovery for digital subcarriers for optical networks

 #27
20230071063
2023-03-09

Optical transmission system, optical transmitting apparatus and optical receiving apparatus

 #28
20220385359
2022-12-01

System and methods for coherent optics based daisy-chaining

 #29
20220190930
2022-06-16

Reception apparatus and non-transitory computer readable medium

 #30
20220158743
2022-05-19

Methods and apparatus for coherent signal amplification and detection

 #31
20220131617
2022-04-28

SYSTEMS AND METHODS FOR CREATING IN A TRANSMITTER A STREAM OF SYMBOL FRAMES CONFIGURED FOR EFFICIENT PROCESSING IN A RECEIVER

 #32
20220116119
2022-04-14

Individually routable subcarriers

 #33
20220116118
2022-04-14

Individually routable subcarriers

 #34
20220094439
2022-03-24

Polarization-diversity Kramers-Kronig heterodyne receiver and method

 #35
20220077927
2022-03-10

Signal transmission and reception method and device in wireless communication system

 #36
20220043320
2022-02-10

Automatic bias control circuit

 #37
20220038327
2022-02-03

Communication device for transmitting data by using multilevel coding, and communication system

 #38
20220021451
2022-01-20

Optical receiver and optical space communication system

 #39
20210320724
2021-10-14

Flexible baud rate

 #40
20210273732
2021-09-02

Phase variation compensation device, phase variation compensation method and communication device

 #41
20210218475
2021-07-15

Coherent optical receiver device and coherent optical receiving method

 #42
20210203420
2021-07-01

Digital resampling method and apparatus

 #43
20210135755
2021-05-06

Monitoring leakage in aeronautical band of high split HFC

 #44
20210119710
2021-04-22

Optical coherent receiver on a chip

 #45
20210119709
2021-04-22

Clock recovery for digital subcarriers for optical networks

 #46
20210105073
2021-04-08

Methods and apparatus for frequency shift keying for optical communication

 #47
20210021350
2021-01-21

Systems and methods for creating in a transmitter a stream of symbol frames configured for efficient processing in a receiver

 #48
20210013972
2021-01-14

Reflection-type coherent optical communication system combined with unidirectional optical signal amplification

 #49
20200382217
2020-12-03

Coherent optical receiver

 #50
20200366376
2020-11-19

Network architecture for independently routable digital subcarriers for optical communication networks

 #51
20200313776
2020-10-01

Coherent optical receiver device and coherent optical receiving method

 #52
20200313775
2020-10-01

Individually routable digital subcarriers

 #53
20200313705
2020-10-01

Echo cancellation (EC) training for a full duplex (FDX) amplifier

 #54
20200304360
2020-09-24

Technique for coherent data communication

 #55
20200295834
2020-09-17

System and methods for coherent optics based daisy-chaining

 #56
20200235842
2020-07-23

Systems and methods for carrier phase recovery

 #57
20200213009
2020-07-02

OPTICAL COMMUNICATION APPARATUS, SERVER APPARATUS, OPTICAL TRANSPORT SYSTEM, AND OPTICAL COMMUNICATION METHOD

 #58
20200204265
2020-06-25

Flexible baud rate

 #59
20200186257
2020-06-11

Optical communication systems, devices, and methods including high performance optical receivers

 #60
20200169326
2020-05-28

Digital resampling method and apparatus

 #61
20200119831
2020-04-16

Methods and apparatus for improving the skew tolerance of a coherent optical transponder in an optical communication system

 #62
20200119815
2020-04-16

PHASE DEMODULATION METHOD AND CIRCUIT

 #63
20200092009
2020-03-19

Methods of converting or reconverting a data signal and method and system for data transmission and/or data reception

 #64
20200092008
2020-03-19

Systems and methods for creating in a transmitter a stream of symbol frames configured for efficient processing in a receiver

 #65
20200028592
2020-01-23

Adaptive digital filtering in an optical receiver

 #66
20200014466
2020-01-09

Coherent optical receiver device and coherent optical receiving method

 #67
20190372675
2019-12-05

Optical communication systems, devices, and methods including high performance optical receivers

 #68
20190363800
2019-11-28

Modulation systems and methods in optical transceivers

 #69
20190342028
2019-11-07

Methods and apparatus for improving the skew tolerance of a coherent optical transponder in an optical communication system

 #70
20190326856
2019-10-24

Quadrature oscillator, FSK modulator, and optical module

 #71
20190319714
2019-10-17

Phase change detection in optical signals

 #72
20190280778
2019-09-12

Pilot-aided digital signal processing for reception of coherent optical communication

 #73
20190253152
2019-08-15

MULTI-RATE OPTICAL NETWORK

 #74
20190245643
2019-08-08

Clock recovery for digital subcarriers for optical networks

 #75
20190245627
2019-08-08

Independently routable digital subcarriers with configurable spacing for optical communication networks

 #76
20190245626
2019-08-08

Independently routable digital subcarriers for optical communication networks

 #77
20190182082
2019-06-13

Partially disjoint equalization and carrier recovery

 #78
20190181960
2019-06-13

Individually routable digital subcarriers

 #79
20190173580
2019-06-06

SYSTEM AND METHOD FOR HIGH SPEED SATELLITE-BASED FREE-SPACE LASER COMMUNICATIONS USING AUTOMATIC GAIN CONTROL

 #80
20190165869
2019-05-30

Phase demodulation method and circuit

 #81
20190149393
2019-05-16

Nonlinearity pre-compensation of high order modulation transmissions

 #82
20190149243
2019-05-16

Orthogonal frequency division multiplexing single sideband transmission over a waveguide

 #83
20190115983
2019-04-18

Optical signal reception apparatus, optical communication system, and method of generating compensation signal of optical signal reception apparatus

 #84
20190074903
2019-03-07

Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus

 #85
20190028198
2019-01-24

Chromatic dispersion management

 #86
20180351644
2018-12-06

Optical communication system, optical receiver, optical receiver control method, and non-transitory computer readable medium

 #87
20180316496
2018-11-01

Simultaneous classical and quantum communication scheme based on coherent detection

 #88
20180302169
2018-10-18

Coherent optical receiver device and coherent optical receiving method

 #89
20180278338
2018-09-27

Decoding a combined amplitude modulated and frequency modulated signal

 #90
20180278337
2018-09-27

Optical communication systems, devices, and methods including high performance optical receivers

 #91
20180269985
2018-09-20

Feedforward decision-free pilot-aided phase noise estimation for coherent optical M-QAM systems

 #92
20180248643
2018-08-30

Reception device and method of detecting supervisory control signal

 #93
20180227161
2018-08-09

Modulation systems and methods in optical transceivers

 #94
20180227056
2018-08-09

Receiving device and receiving method

 #95
20180219632
2018-08-02

Optical relaying apparatus, optical transmission system, and optical-signal reproducing and relaying method

 #96
20180198547
2018-07-12

Systems and methods for network signaling

 #97
20180198525
2018-07-12

Techniques for optical wireless communication

 #98
20180145766
2018-05-24

Phase demodulation method and circuit

 #99
20180123701
2018-05-03

Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method

 #100
20180102853
2018-04-12

Systems and methods for demodulation of PSK modulated optical signals

 #101
20180091225
2018-03-29

Joint source and LDPC coding based coding modulation for ultra-high-speed optical transport

 #102
20180069636
2018-03-08

Hybrid Direct-Detection Differential Phase Shift Keying-Multipulse Pulse Position Modulation Techniques for Optical Communication Systems

 #103
20170353247
2017-12-07

CONSTELLATION DESIGN FOR USE IN COMMUNICATION SYSTEMS

 #104
20170346564
2017-11-30

System and method for high speed satellite-based free-space laser communications using automatic gain control

 #105
20170294972
2017-10-12

Method and system for decoding a modulated signal

 #106
20170237485
2017-08-17

Free-space optical communication system and method in scattering environments

 #107
20170222729
2017-08-03

All-optical silicon-photonic constellation conversion of amplitude-phase modulation formats

 #108
20170214485
2017-07-27

Imaging cancellation in high-speed intensity modulation and direct detection system with dual single sideband modulation

 #109
20170187455
2017-06-29

Techniques for optical wireless communication

 #110
20170180055
2017-06-22

Techniques for receiving DFT spreading modulation signals

 #111
20170134120
2017-05-11

Cycle slip resilient coded modulation for fiber-optic communications

 #112
20160352432
2016-12-01

Decoding a combined amplitude modulated and frequency modulated signal

 #113
20160323040
2016-11-03

Methods and systems for optical detection

 #114
20160315714
2016-10-27

Feedback carrier recovery device

 #115
20160269108
2016-09-15

Method and device for estimation of chromatic dispersion in optical coherent communication

 #116
20160204902
2016-07-14

Maximum likelihood decoding

 #117
20160164610
2016-06-09

Optical communication system, optical receiver, optical receiver control method, and non-transitory computer readable medium

 #118
20160142153
2016-05-19

Chromatic dispersion estimation for digital coherent optical receivers

 #119
20160134261
2016-05-12

Signal processing apparatus, signal processing method, and signal processing system

 #120
20160127048
2016-05-05

SIGNAL PROCESSING METHOD, DETECTION METHOD, AND DETECTION DEVICE

 #121
20160112143
2016-04-21

Blind equalization of dual subcarrier OFDM signals

 #122
20160105245
2016-04-14

Maximum likelihood sequence estimation of quadrature amplitude modulated signals

 #123
20160065313
2016-03-03

Recovering data from quadrature phase shift keying modulated optical signals

 #124
20160050025
2016-02-18

Signal processing device, optical communication system, and signal processing method

 #125
20160028577
2016-01-28

Reception of 2-subcarriers coherent orthogonal frequency division multiplexed signals

 #126
20160006512
2016-01-07

Optical transmission device

 #127
20150365174
2015-12-17

Robust coherent and self-coherent signal processing techniques

 #128
20150270921
2015-09-24

Techniques for blind equalization of high-order quadrature amplitude modulation signals

 #129
20150249507
2015-09-03

Coherent optical receiver device and coherent optical receiving method

 #130
20150188641
2015-07-02

Power-efficient maximum likelihood decoding for 5 bits per dual-pol-symbol modulation

 #131
20150117866
2015-04-30

QUADRATURE AMPLITUDE MODULATION SYMBOL MAPPING

 #132
20150043927
2015-02-12

Combining I-Q and/or PolMux optical receiver to enable single detector

 #133
20150030333
2015-01-29

Hamming coded modulation

 #134
20140376418
2014-12-25

ENHANCED MODULATOR AND DEMODULATOR

 #135
20140308039
2014-10-16

Equalizing a signal modulated using a 5QAM modulation format

 #136
20140286638
2014-09-25

Signal processing apparatus and signal processing method

 #137
20140147112
2014-05-29

Transmission device, transmission method, and communication system

 #138
20140003814
2014-01-02

Processing three-quadrature amplitude modulation (3QAM) traffic using a four-bit phase modulation scheme

 #139
20130315607
2013-11-28

Low cost direct modulation and coherent detection optical OFDM

 #140
20130236172
2013-09-12

Coherent optical receiver device and coherent optical receiving method

 #141
20130230312
2013-09-05

Correction of a local-oscillator phase error in a coherent optical receiver

 #142
20130188971
2013-07-25

Compact polarization-insensitive optical receiver

 #143
20130108276
2013-05-02

Optical receiver and optical transmission system

 #144
20130004158
2013-01-03

Channel de-skewing for a coherent optical receiver

 #145
20120294630
2012-11-22

Blind carrier frequency offset detection for coherent receivers using quadrature amplitude modulation formats

 #146
20120257896
2012-10-11

Coded multidimensional pulse amplitude modulation for ultra-high-speed optical transport

 #147
20120224812
2012-09-06

90-degree hybrid

 #148
20120148235
2012-06-14

CONTROL CIRCUIT, COMMUNICATION SYSTEM, AND CONTROL METHOD

 #149
20110318017
2011-12-29

Method, system, and apparatus for carrier synchronization of QAM modulated signals

 #150
20100232805
2010-09-16

Local oscillator frequency offset compensation in a coherent optical signal receiver

 #151
20100232788
2010-09-16

Dual stage carrier phase estimation in a coherent optical signal receiver

 #152
20070206963
2007-09-06

Optical quadrature-amplitude modulation receiver

 #153
18370492
2024-01-30

Polarization independent DQPSK demodulation integrated optical chip

 #154
18076414
2023-05-09

Analog front-end module of ultra-wideband optical receiver

 #155
17896541
2024-08-27

Systems and methods for coherent burst reception

 #156
17409878
2023-05-09

Systems and methods for carrier phase recovery

 #157
16456767
2020-05-05

Methods and apparatus for adaptive compensation of signal bandwidth narrowing through finite impulse response filters

 #158
16293033
2020-08-04

Optical phase sensitivity enhancement for reduced power

 #159
16287409
2020-01-07

Probabilistic constellation shaping for optical networks with diverse transmission media

 #160
16119032
2019-08-13

Methods and apparatus for adaptive compensation of signal bandwidth narrowing through finite impulse response filters

 #161
16100409
2019-12-17

Reducing variance in reach of WDM channels in an optical network

 #162
15395753
2018-09-04

Methods and apparatus for adaptive compensation of signal bandwidth narrowing through finite impulse response filters

 #163
15258829
2018-03-06

Optical radio-frequency down-conversion and remoting

 #164
15161052
2017-12-12

Photonic direct sampling digital receiver

 #165
14754410
2017-08-08

Receiver architecture for constant envelope OFDM

 #166
13664576
2016-04-26

Maximum likelihood decoding