Patents-Review.com
ClassID:

225867 ⎘

H04L25/4921 - CPC Classification

Classification description:

Baseband systems; Synchronous or start-stop systems, e.g. for Baudot code; Transmitting circuits; Receiving circuits using 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 using multilevel codes using balanced multilevel codes using quadrature encoding, e.g. carrierless amplitude-phase coding

Recent Application in this class:
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System And Method for Multiple Supply IQ Sharing in Digital to Analog Signal Conversion

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2025-07-24

MULTI-LEVEL SIGNALING IN MEMORY WITH WIDE SYSTEM INTERFACE

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20250233782
2025-07-17

METHOD OF CORRECTING ERRORS IN AN IQ SIGNAL GENERATOR SYSTEM

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20250226945
2025-07-10

OPTIMIZATION OF MAPPING AND DEMAPPING FOR WIRELESS COMMUNICATION CHANNELS

 #6
20250141721
2025-05-01

FREQUENCY MODULATION IN A COMMUNICATIONS NETWORK

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20230188386
2023-06-15

Transceiver and driving method thereof

 #8
20230164010
2023-05-25

IQ clock phase calibration

 #9
20220173948
2022-06-02

Communication system using shape-shifted sinusoidal waveforms

 #10
20220123974
2022-04-21

Multi-level signaling in memory with wide system interface

 #11
20210050734
2021-02-18

Multi-level encoding for battery management system field

 #12
20200412423
2020-12-31

Base station for communicating using plurality of antennas and operation method therefor

 #13
20200382355
2020-12-03

High spectral efficiency data communications system

 #14
20200267032
2020-08-20

Multi-level signaling in memory with wide system interface

 #15
20200233827
2020-07-23

Bus decode and triggering on digital down converted data in a test and measurement instrument

 #16
20200028720
2020-01-23

Multi-level signaling in memory with wide system interface

 #17
20190173705
2019-06-06

High spectral efficiency data communications system using encoded sinusoidal waveforms

 #18
20190173586
2019-06-06

PAM-4 transmitter precoder for 1+0.5D PR channels

 #19
20190165973
2019-05-30

Receiver for high spectral efficiency data communications system using encoded sinusoidal waveforms

 #20
20190140882
2019-05-09

Narrowband sinewave modulation system

 #21
20190140873
2019-05-09

Receiver for high spectral efficiency data communications system using encoded sinusoidal waveforms

 #22
20190132175
2019-05-02

Multi-carrier data communications system having high spectral efficiency

 #23
20190132174
2019-05-02

High spectral efficiency data communications system using encoded sinusoidal waveforms

 #24
20190132167
2019-05-02

System for encoding multi-bit features into sinusoidal waveforms at selected phase angles

 #25
20190132166
2019-05-02

High spectral efficiency data communications system using energy-balanced modulation

 #26
20190044764
2019-02-07

Multi-level signaling in memory with wide system interface

 #27
20170222750
2017-08-03

Encoding modulation method and transmitter

 #28
20160261439
2016-09-08

Modulating system adapted to generate a multi-level quadrature amplitude modulation

 #29
20160112235
2016-04-21

Signal modulation method, signal demodulation method, signal modulation apparatus, signal demodulation apparatus and signal transmission system

 #30
20150125160
2015-05-07

Method and apparatus for directly detected optical transmission systems based on carrierless amplitude-phase modulation

 #31
20140320182
2014-10-30

Geographic locating remote endpoint monitor device, system, and methodology thereof

 #32
20130195040
2013-08-01

Geographic locating remote endpoint monitor device, system, and methodology thereof

 #33
20090103509
2009-04-23

Geographic locating remote endpoint monitor device, system, and methodology thereof

 #34
20090021320
2009-01-22

Cartesian modulation system via multi-level pulse width modulation

 #35
20070071114
2007-03-29

Mobile multifrequency transmitter transmitting on frequencies based on geographic locations and a method thereof

 #36
20070002943
2007-01-04

Suppressed carrier quadrature pulse modulator

 #37
20050129138
2005-06-16

Method and apparatus for implementing adaptive tomlinson-harashima precoding in a digital data link

 #38
20050094723
2005-05-05

Adaptive FIR filter and method

 #39
17991747
2025-02-04

Clock recovery for PAM4 signaling using bin-map

 #40
16417455
2020-06-16

Digital RF-DAC

 #41
15601183
2019-07-09

Apparatus, system, and method for mitigating crosstalk among SerDes devices

 #42
15195167
2017-10-24

Transmitter (TX) dead-time modulation