Patents-Review.com
ClassID:

223927 ⎘

H04B10/613 - 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 including phase diversity, e.g., having in-phase and quadrature branches, as in QPSK coherent receivers

Recent Application in this class:
#1
20260121744
2026-04-30

MEASUREMENT SYSTEM AND MEASUREMENT METHOD

 #2
20260106673
2026-04-16

COHERENT OPTICAL RECEIVING METHOD AND RECEIVER

 #3
20260100764
2026-04-09

SIGNAL PROCESSING CIRCUIT, OPTICAL SIGNAL RECEIVING DEVICE, AND SIGNAL PROCESSING METHOD

 #4
20260058733
2026-02-26

DYNAMIC POWER CONSUMPTION MANAGEMENT SYSTEM

 #5
20250385740
2025-12-18

OPTICAL RECEIVER AND OPTICAL RECEIVING METHOD

 #6
20250286619
2025-09-11

FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS

 #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
20250240101
2025-07-24

RECEIVER DEVICE FOR PULSE AMPLITUDE MODULATION SIGNALS

 #11
20250219739
2025-07-03

RECONFIGURABLE DEFRAMER FOR OPTICAL COMMUNICATIONS

 #12
20250211359
2025-06-26

FLEXIBLE FORWARDED CLOCKING ARCHITECTURE FOR DENSE WAVELENGTH DIVISION MULTIPLEXING SYSTEMS

 #13
20250192881
2025-06-12

FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS

 #14
20250167882
2025-05-22

TIME DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS

 #15
20250089382
2025-03-13

OPTICAL SEMICONDUCTOR DEVICE, OPTICAL RECEIVER, AND OPTICAL TRANSCEIVER

 #16
20250016765
2025-01-09

DATA COMMUNICATION METHOD, DEVICE, BASE STATION EQUIPMENT AND COMPUTER-READABLE STORAGE MEDIUM

 #17
20250015897
2025-01-09

OPTICAL COHERENT RECEIVER HAVING AN OPTICAL HYBRID CONFIGURATION WITH REDUCED PHASE ERROR

 #18
20240405870
2024-12-05

Bi-directional optical communication system

 #19
20240396639
2024-11-28

OPTICAL RECEIVING DEVICE

 #20
20240305383
2024-09-12

Optical coherent receiver having an optical hybrid configuration with reduced phase error

 #21
20240267129
2024-08-08

SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD AND COMMUNICATION SYSTEM

 #22
20240137127
2024-04-25

OPTICAL TRANSMITTER THAT TRANSMITS MULTI-LEVEL SIGNAL

 #23
20240121006
2024-04-11

COHERENT DETECTION METHOD AND APPARATUS, AND OPTICAL TRANSMISSION SYSTEM

 #24
20240097782
2024-03-21

Method and system for generating the spectrogram of a signal

 #25
20230216594
2023-07-06

COHERENT OPTICAL RECEIVER DEVICE AND COHERENT OPTICAL RECEIVING METHOD

 #26
20230198630
2023-06-22

Optical receiving device and optical receiving method

 #27
20230120581
2023-04-20

Technology for optical modulator evaluation on basis of phase recovery

 #28
20230092560
2023-03-23

Frequency division multiple access optical subcarriers

 #29
20230061657
2023-03-02

Frequency division multiple access optical subcarriers

 #30
20230013373
2023-01-19

Leveraging coherent detection to measure performance of optical transmitter

 #31
20230006737
2023-01-05

Time division multiple access optical subcarriers

 #32
20220385359
2022-12-01

System and methods for coherent optics based daisy-chaining

 #33
20220376781
2022-11-24

Frequency division multiple access optical subcarriers

 #34
20220376780
2022-11-24

Frequency division multiple access optical subcarriers

 #35
20220337317
2022-10-20

High power handling digitizer using photonics

 #36
20220329322
2022-10-13

Systems, devices, and methods for tuning transceivers

 #37
20220294536
2022-09-15

Optical communication system and optical communication method

 #38
20220171251
2022-06-02

Optical modulator, optical receiver, conversion device, spin orbital direct product state generation device, and quantum computer

 #39
20220166516
2022-05-26

Wide-area sensing of amplitude modulated signals

 #40
20220158748
2022-05-19

Transmission/reception device and transmission/reception method

 #41
20220146304
2022-05-12

Reduced complexity polarization combining method for coherent DAS

 #42
20220123831
2022-04-21

FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS

 #43
20220021451
2022-01-20

Optical receiver and optical space communication system

 #44
20210359764
2021-11-18

OPTICAL TRANSMITTER AND OPTICAL RECEIVER

 #45
20210273777
2021-09-02

Frame synchronization apparatus, optical communication apparatus, and frame synchronization method

 #46
20210266142
2021-08-26

Method and system for secure phase-encoded digital communication over optical channels

 #47
20210218475
2021-07-15

Coherent optical receiver device and coherent optical receiving method

 #48
20210194593
2021-06-24

Adaptive constellation diagram reducing the impact of phase distortions

 #49
20210167939
2021-06-03

Frame synchronization apparatus, optical communication apparatus, and frame synchronization method

 #50
20210124106
2021-04-29

Multiband photonic integrated circuit (PIC) I and Q demodulator

 #51
20210119705
2021-04-22

Apparatus and methods for digital signal constellation transformation

 #52
20210091858
2021-03-25

Optical communication system employing a multidimensional constellation with an increased minimum distance

 #53
20210083779
2021-03-18

Signal processing device and signal processing method

 #54
20210068040
2021-03-04

Method for updating a list of stations that can be received by a radio receiver system

 #55
20210021349
2021-01-21

High power handling digitizer using photonics

 #56
20200413169
2020-12-31

Frequency division multiple access optical subcarriers

 #57
20200403704
2020-12-24

Frequency division multiple access optical subcarriers

 #58
20200403702
2020-12-24

Frequency division multiple access optical subcarriers

 #59
20200382216
2020-12-03

Frequency division multiple access optical subcarriers

 #60
20200313776
2020-10-01

Coherent optical receiver device and coherent optical receiving method

 #61
20200295834
2020-09-17

System and methods for coherent optics based daisy-chaining

 #62
20200287651
2020-09-10

Time division multiple access optical subcarriers

 #63
20200287649
2020-09-10

Code division multiple access optical subcarriers

 #64
20200287648
2020-09-10

Code division multiple access optical subcarriers

 #65
20200287621
2020-09-10

Time division multiple access optical subcarriers

 #66
20200266901
2020-08-20

Apparatus and method for estimating polarization skew

 #67
20200244366
2020-07-30

Apparatus and methods for digital signal constellation transformation

 #68
20200195342
2020-06-18

Implementing a Li-Fi transceiver by reusing elements designed for a Wi-Fi device

 #69
20200153513
2020-05-14

Receiver of coherent optical communication link and method of compensating carrier phase offset in receiver

 #70
20200092000
2020-03-19

Systems and methods for skew detection and pre-compensation in a coherent optical system

 #71
20200064571
2020-02-27

Optical semiconductor device

 #72
20200052793
2020-02-13

Optical receiver, optical reception method, and optical communication system

 #73
20200014466
2020-01-09

Coherent optical receiver device and coherent optical receiving method

 #74
20190372673
2019-12-05

Apparatus and methods for digital signal constellation transformation

 #75
20190349090
2019-11-14

Coherent optical communication with constellations having coordinates on circles

 #76
20190334627
2019-10-31

Clock recovery for band-limited optical channels

 #77
20190326998
2019-10-24

Method and apparatus for transmitter IQ skew and insertion loss detection for coherent optical systems

 #78
20190326856
2019-10-24

Quadrature oscillator, FSK modulator, and optical module

 #79
20190215145
2019-07-11

Signal processing device and signal processing method

 #80
20190207644
2019-07-04

Extended range communications for ultra-wideband network nodes

 #81
20190199443
2019-06-27

Trellis based processing for robust digital multiband transmission

 #82
20190199395
2019-06-27

Extended range communications for ultra-wideb and network nodes

 #83
20190058441
2019-02-21

Quadrature oscillation circuit and CDR circuit

 #84
20180316496
2018-11-01

Simultaneous classical and quantum communication scheme based on coherent detection

 #85
20180309520
2018-10-25

Apparatus and methods for digital signal constellation transformation

 #86
20180302169
2018-10-18

Coherent optical receiver device and coherent optical receiving method

 #87
20180219632
2018-08-02

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

 #88
20180191447
2018-07-05

Optical signal processing method and coherent receiver

 #89
20180183489
2018-06-28

Extended range communications for ultra-wideband network nodes

 #90
20180152242
2018-05-31

Optical receiver that receives polarization multiplexed optical signal

 #91
20180123699
2018-05-03

Optical sparse phased array receiver

 #92
20180102838
2018-04-12

Measuring apparatus and method of frequency response characteristic imbalance of optical receiver

 #93
20180019817
2018-01-18

Scrambler for a multimode optical fiber and optical transmission system using such scrambler systems

 #94
20170180055
2017-06-22

Techniques for receiving DFT spreading modulation signals

 #95
20170163406
2017-06-08

OFDM frame synchronization for coherent and direct detection in an optical fiber telecommunication system

 #96
20170099110
2017-04-06

Optical receiver circuit and adjustment method for same

 #97
20160315714
2016-10-27

Feedback carrier recovery device

 #98
20160269108
2016-09-15

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

 #99
20160204902
2016-07-14

Maximum likelihood decoding

 #100
20160191168
2016-06-30

Intra-transceiver optical superchannel switching via RF sub-band multiplexing technique

 #101
20160182155
2016-06-23

Coherent optical receiver

 #102
20160142153
2016-05-19

Chromatic dispersion estimation for digital coherent optical receivers

 #103
20160105245
2016-04-14

Maximum likelihood sequence estimation of quadrature amplitude modulated signals

 #104
20160065313
2016-03-03

Recovering data from quadrature phase shift keying modulated optical signals

 #105
20160050025
2016-02-18

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

 #106
20160021438
2016-01-21

METHOD OF OPTICAL DATA TRANSMISSION

 #107
20150372765
2015-12-24

Signal processing device and signal processing method

 #108
20150365174
2015-12-17

Robust coherent and self-coherent signal processing techniques

 #109
20150349888
2015-12-03

Multiple-input method and apparatus of free-space optical communication

 #110
20150326319
2015-11-12

Optical transceiver having auxiliary area to install Mach-Zehnder modulator

 #111
20150295660
2015-10-15

Optical receiver, optical receiving device, and method for correcting received optical intensity

 #112
20150270921
2015-09-24

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

 #113
20150249507
2015-09-03

Coherent optical receiver device and coherent optical receiving method

 #114
20150139667
2015-05-21

Optical receiver circuit

 #115
20150043927
2015-02-12

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

 #116
20150030333
2015-01-29

Hamming coded modulation

 #117
20150030330
2015-01-29

Optical transmitter, optical communication system, and optical communication method

 #118
20140341594
2014-11-20

Optical homodyne coherent receiver and method for receiving a multichannel optical signal

 #119
20140270808
2014-09-18

Method and system for a polarization mode dispersion tolerant optical homodyne detection system with optimized transmission modulation

 #120
20140233966
2014-08-21

Recovering data from quadrature phase shift keying modulated optical signals

 #121
20140212149
2014-07-31

Soft decoding of data in a coherent optical receiver

 #122
20140169786
2014-06-19

Apparatus and method for measuring IQ imbalance for optical receiver

 #123
20140161470
2014-06-12

Skew compensation and tracking in communications systems

 #124
20140147111
2014-05-29

Level equalization to compensate for implementation impairments in optical communication systems with high-order modulations

 #125
20140056585
2014-02-27

Next generation optical access network with centralized digital OLT

 #126
20140003813
2014-01-02

Forward error correction for an optical transport system

 #127
20130315609
2013-11-28

Method with improved phase robustness in coherent detected optical system

 #128
20130236172
2013-09-12

Coherent optical receiver device and coherent optical receiving method

 #129
20130216239
2013-08-22

System and method for blind equalization and carrier phase recovery in a quadrature amplitude modulated system

 #130
20130183034
2013-07-18

Method and apparatus of using digital equalizer for cascaded wavelength selective switch compensation

 #131
20130101300
2013-04-25

Power adjustment of in-phase and quadrature components at a coherent optical receiver

 #132
20130089339
2013-04-11

System, method and apparatus for high-sensitivity optical detection

 #133
20130045015
2013-02-21

METHOD AND ARRANGEMENT FOR SIGNAL PROCESSING IN A COMMUNICATION SYSTEM

 #134
20120288286
2012-11-15

OPTICAL RECEIVER FOR AMPLITUDE-MODULATED SIGNALS

 #135
20120251112
2012-10-04

Method and system for coherent equalization of chromatic dispersion of optical signals in a fiber

 #136
20120251111
2012-10-04

OPTOELECTRONIC WAVELENGTH CONVERTER FOR POLARIZATION MULTIPLEXED OPTICAL SIGNALS

 #137
20120237221
2012-09-20

Coherent optical signal processing

 #138
20120235024
2012-09-20

Coherent optical signal processing

 #139
20120224184
2012-09-06

Optical detector for detecting optical signal beams, method to detect optical signals, and use of an optical detector to detect optical signals

 #140
20120213510
2012-08-23

Skew estimator, skew compensator and coherent receiver

 #141
20120207474
2012-08-16

PLC-type demodulator and optical transmission system

 #142
20120189324
2012-07-26

Soft-input generation for soft-decision FEC decoding

 #143
20120189320
2012-07-26

Skew compensation and tracking in communications systems

 #144
20120189319
2012-07-26

Adaptive PMD equalizer and implementation

 #145
20120189299
2012-07-26

Optical receiver

 #146
20120183303
2012-07-19

MULTILEVEL MODULATED OPTICAL TRANSCEIVER AND MULTILEVEL MODULATED OPTICAL TRANSMITTING/RECEIVING METHOD

 #147
20120155887
2012-06-21

Method and apparatus for transmitting and receiving coherent optical OFDM

 #148
20120148235
2012-06-14

CONTROL CIRCUIT, COMMUNICATION SYSTEM, AND CONTROL METHOD

 #149
20120141067
2012-06-07

Optical 90-degree hybrid circuit

 #150
20120134685
2012-05-31

Loop filter

 #151
20120134684
2012-05-31

Adaptive equalizer, optical receiver, and tap coefficient correcting method

 #152
20120128361
2012-05-24

Method and system for a polarization mode dispersion tolerant optical homodyne detection system with optimized transmission modulation

 #153
20120093457
2012-04-19

Optical 90-degree hybrid circuit

 #154
20120082414
2012-04-05

Optical 90-degree hybrid circuit

 #155
20120076507
2012-03-29

Single pin coherent receiver

 #156
20120069854
2012-03-22

COHERENT OPTICAL RECEIVER AND CONTROL METHOD THEREOF

 #157
20120057863
2012-03-08

Frequency-dependent I/Q-signal imbalance correction coherent optical transceivers

 #158
20120039606
2012-02-16

Low power optical transceiver using orthogonal polarization detection technique

 #159
20120033965
2012-02-09

Method and apparatus for broadband carrier frequency and phase recovery in coherent optical system

 #160
20120008961
2012-01-12

Multiple-input method and apparatus of free-space optical communication

 #161
20120008951
2012-01-12

Demodulator and optical transceiver

 #162
20110318017
2011-12-29

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

 #163
20110255870
2011-10-20

Optical transceivers for use in fiber optic communication networks

 #164
20110229137
2011-09-22

Tunable receiver

 #165
20110200339
2011-08-18

Optical receiver

 #166
20110158574
2011-06-30

Optical hybrid circuit, optical receiver, and optical receiving method

 #167
20110150504
2011-06-23

COHERENT OPTICAL RECEIVER SYSTEM AND METHOD FOR DETECTING PHASE MODULATED SIGNALS

 #168
20110150503
2011-06-23

Receiver algorithms for coherent detection of polarization-multiplexed optical signals

 #169
20110103795
2011-05-05

Soft decoding of data in a coherent optical receiver

 #170
20100329698
2010-12-30

Signal processing circuit, optical receiver, detector and method for compensating for waveform distortion

 #171
20100329670
2010-12-30

Receiver for optical transverse-mode-multiplexed signals

 #172
20100303474
2010-12-02

Digital coherent optical receiver

 #173
20100247113
2010-09-30

Phase error correction in a coherent receiver

 #174
20100209121
2010-08-19

Signal processing device and optical receiving device

 #175
20100178065
2010-07-15

Delay processing apparatus, signal amplification apparatus, opto-electric conversion apparatus, analog-digital conversion apparatus, receiving apparatus, and receiving method

 #176
20100178056
2010-07-15

Multi-wavelength coherent receiver with a shared optical hybrid and a multi-wavelength local oscillator

 #177
20100166427
2010-07-01

Optical hybrid circuit, optical receiver and light receiving method

 #178
20100135656
2010-06-03

OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATIONS WITH NONLINEARITY COMPENSATION

 #179
20100111544
2010-05-06

Optical receiver for controlling wavelength of local oscillation light and local oscillation light control method

 #180
20100098438
2010-04-22

Homodyne receiver for optical communications with post processing

 #181
20100046957
2010-02-25

Method and system for a polarization mode dispersion tolerant optical homodyne detection system with optimized transmission modulation

 #182
20100028024
2010-02-04

Secure optical communications system and method with coherent detection

 #183
20100021179
2010-01-28

Optical field receiver and optical transmission system

 #184
20090190929
2009-07-30

Optical orthogonal frequency division multiplexed communications with nonlinearity compensation

 #185
20090185810
2009-07-23

Single chip two-polarization quadrature synthesizer, analyser and optical communications system using the same

 #186
20090142076
2009-06-04

Frequency offset compensating apparatus and method, and optical coherent receiver

 #187
20090142051
2009-06-04

Coherent optical detector and coherent communication system and method

 #188
20090129788
2009-05-21

Optical Receiver For Receiving A Signal With M-Valued Quadrature Amplitude Modulation With Differential Phase Coding And Application Of Same

 #189
20090129787
2009-05-21

Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver

 #190
20090080906
2009-03-26

Frequency offset monitoring device and optical coherent receiver

 #191
20090060511
2009-03-05

Coherent optical receiver

 #192
20080205905
2008-08-28

Digital phase estimator, digital phase locked loop and optical coherent receiver

 #193
20080145066
2008-06-19

Coherent optical receiver

 #194
20070297806
2007-12-27

System and method for receiving coherent, polarization-multiplexed optical signals

 #195
20070274733
2007-11-29

Coherent optical detector and coherent communication system and method

 #196
20070147850
2007-06-28

Digital Compensation for Optical Transmission System

 #197
20070110362
2007-05-17

Coherent optical detector and coherent communication system and method

 #198
20070071456
2007-03-29

Optical heterodyne receiver and method of extracting data from a phase-modulated input optical signal

 #199
17863968
2024-07-09

Coherent optical breakout

 #200
17850620
2023-08-22

Radio frequency (RF) signal processor with photonic local oscillator (LO) phase control

 #201
17827581
2024-01-23

Systems and methods for carrier phase recovery

 #202
17689634
2025-01-07

Differential differencing transimpedance amplifier for coherent applications

 #203
17460905
2022-12-27

Systems and methods for skew detection and pre-compensation in a coherent optical system

 #204
17008402
2022-03-15

Apparatus and method for in-phase and quadrature skew calibration in a coherent transceiver

 #205
16429706
2020-06-16

Monitoring and correcting I/Q imbalance in high-speed optical communications systems

 #206
16290854
2020-07-14

Recovery of phase-modulated data from an optical signal via intensity measurements

 #207
15867269
2019-06-04

High-efficiency self-resetting integrating optical transceiver

 #208
13664576
2016-04-26

Maximum likelihood decoding