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Frequency-division multiplex systems
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Parent Industries
H
ELECTRICITY
H04
Electric communication
H04J
MULTIPLEX COMMUNICATION
Current Industry
H04J1/00
Frequency-division multiplex systems
Sub Industries
H04J1/02
Details
H04J1/04
Frequency-transposition arrangements
H04J1/045
Filters applied to frequency transposition
H04J1/05
using digital techniques
H04J1/06
Arrangements for supplying the carrier waves Arrangements for supplying synchronisation signals
H04J1/065
Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station
H04J1/08
Arrangements for combining channels
H04J1/085
Terminal station; Combined modulator and demodulator circuits
H04J1/10
Intermediate station arrangements
H04J1/12
Arrangements for reducing cross-talk between channels
H04J1/14
Arrangements providing for calling or supervisory signals
H04J1/16
Monitoring arrangements
H04J1/18
in which all the carriers are amplitude-modulated
H04J1/20
in which at least one carrier is angle-modulated
Industries
Overview
Organizations
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Impact
Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for downlink multi-user with DFT-s-OFDM waveform
Patent number
12,368,526
Issue date
Jul 22, 2025
RAKUTEN SYMPHONY, INC.
Erdem Bala
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method for transmitting uplink data in wireless communication syste...
Patent number
12,369,150
Issue date
Jul 22, 2025
LG Electronics Inc.
Seokmin Shin
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
DWDM path outage prediction and alternative path recommendation
Patent number
12,368,507
Issue date
Jul 22, 2025
AT&T Intellectual Property I, L.P.
Mritunjay Pandey
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Quantum probability encoding for path identification, quantum relay...
Patent number
12,368,516
Issue date
Jul 22, 2025
General Dynamics MIssion Systems, Inc.
Todd Hodges
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Orchestration control protocol
Patent number
12,368,525
Issue date
Jul 22, 2025
Infinera Corp
Ashok Kunjidhapatham
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for multiplexing signals
Patent number
12,367,409
Issue date
Jul 22, 2025
PSIQUANTUM, CORP.
Mihir Pant
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and apparatus for reciprocity based CSI-RS transmission and...
Patent number
12,368,485
Issue date
Jul 22, 2025
Samsung Electronics Co., Ltd.
Md. Saifur Rahman
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method for accessing a cellular communications network in unlicense...
Patent number
12,369,193
Issue date
Jul 22, 2025
Telefonaktiebolaget LM Ericsson (publ)
Johan Axnäs
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Satellite communications using spread signals
Patent number
12,362,796
Issue date
Jul 15, 2025
Viasat, Inc.
Peter S. Wyckoff
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus, method, and computer program
Patent number
12,362,849
Issue date
Jul 15, 2025
Nokia Technologies Oy
Kari Pajukoski
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical frequency spectral optimization in dense wavelength divisio...
Patent number
12,362,826
Issue date
Jul 15, 2025
Level 3 Communications, LLC
James E. Shearer
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Replicated grant-free transmissions utilizing multiple configurations
Patent number
12,363,685
Issue date
Jul 15, 2025
DISH Wireless L.L.C.
Mehdi Alasti
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Channel quality information feedback techniques
Patent number
12,363,777
Issue date
Jul 15, 2025
Apple Inc.
Alexei Davydov
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for transmitting reference signal for frequenc...
Patent number
12,362,980
Issue date
Jul 15, 2025
KT Corporation
Ki-tae Kim
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Next level enhancements for 5G NR to improve UE performance
Patent number
12,356,228
Issue date
Jul 8, 2025
QUALCOMM Incorporated
Hargovind Prasad Bansal
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wireless communication system, wireless communication method, trans...
Patent number
12,355,549
Issue date
Jul 8, 2025
Nippon Telegraph and Telephone Corporation
Kazuo Osaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Set of servers for “machine-to-machine” communications using public...
Patent number
12,355,872
Issue date
Jul 8, 2025
Network-1 Technologies, Inc.
John A. Nix
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Broadcast signal frame generating apparatus and broadcast signal fr...
Patent number
12,355,605
Issue date
Jul 8, 2025
Electronics and Telecommunications Research Institute
Sung-Ik Park
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method for transmitting and receiving demodulation reference signal...
Patent number
12,355,696
Issue date
Jul 8, 2025
Datang Mobile Communications Equipment Co., Ltd.
Xiaotao Ren
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Dynamically switching queueing schemes for network switches
Patent number
12,355,552
Issue date
Jul 8, 2025
Infinera Corporation
Steven J. Hand
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Fast secondary cell activation with temporary reference signals
Patent number
12,356,490
Issue date
Jul 8, 2025
Apple Inc.
Hong He
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal transmission power adjustment in a wireless device
Patent number
12,356,336
Issue date
Jul 8, 2025
Comcast Cable Communications, LLC
Esmael Hejazi Dinan
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Broadband wavelength division multiplexing for free space optical c...
Patent number
12,355,551
Issue date
Jul 8, 2025
ATTOCHRON, LLC
Thomas M. Chaffee
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
User equipment assistance for resource selection in new radio vehic...
Patent number
12,356,405
Issue date
Jul 8, 2025
Samsung Electronics Co., Ltd.
Yaser Mohamed Mostafa Kamal Fouad
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Methods and systems for monitoring optical networks
Patent number
12,355,486
Issue date
Jul 8, 2025
Comcast Cable Communications, LLC
Venk Mutalik
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Scalable add/drop colorless, directionless, and contentionless opti...
Patent number
12,355,550
Issue date
Jul 8, 2025
Ciena Corporation
Paul Chedore
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Overlapping basic service set status indication for an access point...
Patent number
12,349,046
Issue date
Jul 1, 2025
Avalon Technology Solutions LLC
Heejung Yu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Tunable optical wedge for reducing crosstalk in wavelength selectiv...
Patent number
12,345,998
Issue date
Jul 1, 2025
II-VI DELAWARE, INC.
Helen Chen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Crosspoint switch with μLED IO ports and imaging fiber cables
Patent number
12,348,913
Issue date
Jul 1, 2025
Ciena Corporation
Daniel Rivaud
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optimization of spectrum sharing in optical line systems
Patent number
12,348,265
Issue date
Jul 1, 2025
Ciena Corporation
Priyanth Mehta
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
RING RESONATOR FILTER BASED WDM RECEIVER AND OPERATING METHOD THEREOF
Publication number
20250237816
Publication date
Jul 24, 2025
UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
Woo Young CHOI
G02 - OPTICS
Information
Patent Application
COMMUNICATION APPARATUS AND COMMUNICATION METHOD
Publication number
20250240062
Publication date
Jul 24, 2025
Panasonic Intellectual Property Corporation of America
Yutaka MURAKAMI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND T...
Publication number
20250240097
Publication date
Jul 24, 2025
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND T...
Publication number
20250240098
Publication date
Jul 24, 2025
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND METHOD OF SIGNAL TRANSMISSION
Publication number
20250233662
Publication date
Jul 17, 2025
Taiwan Semiconductor Manufacturing company Ltd.
YOU-CHENG LU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL ADD DROP MULTIPLEXERS WITH ASYMMETRICAL FILTERING
Publication number
20250233681
Publication date
Jul 17, 2025
EQUINIX, INC.
Qiang Wang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PERFORMANCE MONITORING DATA INTEGRATED ROUTE PLANNING TOOL FOR RECO...
Publication number
20250233682
Publication date
Jul 17, 2025
AT&T INTELLECTUAL PROPERTY I, L.P.
Guodong Zhang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION CONTROL APPARATUS AND COMMUNICATION CONTROL METHOD
Publication number
20250233683
Publication date
Jul 17, 2025
Nippon Telegraph and Telephone Corporation
Shin KANEKO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION APPARATUS AND OPTICAL PATH OPENING METHOD
Publication number
20250233667
Publication date
Jul 17, 2025
Nippon Telegraph and Telephone Corporation
Shin KANEKO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL RECEIVER, OPTICAL TRANSMISSION METHOD...
Publication number
20250233670
Publication date
Jul 17, 2025
Nippon Telegraph and Telephone Corporation
Fukutaro HAMAOKA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SPATIAL MULTIPLEXING OPTICAL RECEIVER, SPATIAL MULTIPLEXING OPTICAL...
Publication number
20250233684
Publication date
Jul 17, 2025
NEC Corporation
Manabu Arikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TERMINAL, RADIO COMMUNICATION METHOD, AND BASE STATION
Publication number
20250226951
Publication date
Jul 10, 2025
NTT DoCoMo, Inc.
Naoya Shibaike
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WIRELESS COMMUNICATION METHOD, BASE STATION EQUIPMENT, AND WIRELESS...
Publication number
20250226885
Publication date
Jul 10, 2025
Nippon Telegraph and Telephone Corporation
Yasuyoshi YAMAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DEVICES AND METHODS FOR STEERING AN ELECTROMAGNETIC BEAM HAVING ONE...
Publication number
20250226909
Publication date
Jul 10, 2025
Huawei Technologies Co., Ltd
Mohammad Akbari CHOUBAR
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
TRANSPORT BLOCK SIZE DETERMINATION IN COMMUNICATION NETWORKS
Publication number
20250227689
Publication date
Jul 10, 2025
Sharp Kabushiki Kaisha
Tomoki Yoshimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Time-Division Multiplexing (TDM) Scheduling in a Network Adapter
Publication number
20250226910
Publication date
Jul 10, 2025
MELLANOX TECHNOLOGIES, LTD.
Dotan David Levi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method, System, and Computer Program Product for Containerized Opti...
Publication number
20250226907
Publication date
Jul 10, 2025
II-VI Delaware, Inc.
Yajun Wang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SYSTEM AND METHOD FOR DETERMINING LAUNCH ENERGY, POWER AND EFFICIEN...
Publication number
20250226908
Publication date
Jul 10, 2025
AT&T Communications Services India Private Limited
Mritunjay Pandey
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION METHOD, AND RELAY...
Publication number
20250219733
Publication date
Jul 3, 2025
Nippon Telegraph and Telephone Corporation
Megumi HOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL PROCESSING DEVICES, SYSTEMS AND METHOD, AND SIGNAL TRANSMISS...
Publication number
20250219754
Publication date
Jul 3, 2025
CHINA TELECOM CORPORATION LIMITED
Xiaowei LOU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
APPARATUS AND METHOD FOR OPTICAL COMMUNICATION IN CODE-DIVISIONAL M...
Publication number
20250219755
Publication date
Jul 3, 2025
Kookmin University Industry Academy Cooperation Foundation
Yeong Min Jang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHODS, DEVICES, AND SYSTEMS FOR MANAGEMENT OF WIRELESS COMMUNICAT...
Publication number
20250219731
Publication date
Jul 3, 2025
LUMEOVA, INC.
William Joseph Croughwell
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
FIBER SHUFFLE BOX, DATA PROCESSING METHOD AND COMPUTER STORAGE MEDIUM
Publication number
20250219756
Publication date
Jul 3, 2025
CLOUD INTELLIGENCE ASSETS HOLDING (SINGAPORE) PRIVATE LIMITED
Huan ZHANG
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
APPLICATION OF ORBITAL ANGULAR MOMENTUM TO FIBER, FSO AND RF
Publication number
20250211335
Publication date
Jun 26, 2025
NXGEN PARTNERS IP, LLC
SOLYMAN ASHRAFI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SHORT WAVELENGTH DIVISION MULTIPLEXING SYSTEM
Publication number
20250211357
Publication date
Jun 26, 2025
Cisco Technology, Inc.
Fabrizio Forghieri
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Spectrum assignment in optical networks utilizing a minimum represe...
Publication number
20250211881
Publication date
Jun 26, 2025
CIENA CORPORATION
Zach Dunnigan
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WIND TURBINE WITH CONTROL NETWORK AND MONITORING NETWORK
Publication number
20250207559
Publication date
Jun 26, 2025
VESTAS WIND SYSTEMS A/S
Peter Delgado GROVE
F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information
Patent Application
TRANSMISSION OF SOUNDING REFERENCE SIGNALS USING A PLURALITY OF POR...
Publication number
20250211389
Publication date
Jun 26, 2025
Centre of Excellence in Wireless Technology
Pardhasarathy JYOTHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, OPTICAL SIGNAL CONTROL METHOD, AND OP...
Publication number
20250211358
Publication date
Jun 26, 2025
NEC Corporation
Kenji MORIMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION SYSTEM
Publication number
20250211356
Publication date
Jun 26, 2025
Fujitsu Limited
Kentaro KAWANISHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE