ClassID:

219714

H03F2201/3233 - CPC Classification

Classification description:

Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by; Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion

Recent Application in this class:
#1
20260012140
2026-01-08

LINEARIZATION METHOD FOR POWER AMPLIFIER AND ELECTRONIC DEVICE THEREOF

#2
20250274083
2025-08-28

Digital Predistortion Method and Digital Predistortion Apparatus

#3
20250247765
2025-07-31

DISTRIBUTED ANTENNA SYSTEM

#4
20250247057
2025-07-31

PRE-DISTORTION TRAINING FEEDBACK VIA INDUCTIVE COUPLING

#5
20250233561
2025-07-17

HYBRID PREDISTORTION IN A WIRELESS TRANSMISSION CIRCUIT

#6
20250168836
2025-05-22

REMOTELY RECONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHODS

#7
20250126011
2025-04-17

DIGITAL PRE-DISTORTION COMPENSATION IN A WIRELESS COMMUNICATIONS SYSTEM

#8
20250096738
2025-03-20

POWER AMPLIFIER WITH ANALOG PREDISTORTION

#9
20250070725
2025-02-27

APPARATUS AND METHOD FOR DIGITAL PREDISTORTION INITIALIZATION OF HIGH-POWER AMPLIFIERS

#10
20240314668
2024-09-19

Distributed Antenna System

#11
20240313711
2024-09-19

DISTORTION CORRECTION FOR FAST SUPPLY VOLTAGE CHANGES IN POWER AMPLIFIER

#12
20240297621
2024-09-05

METHODS, APPARATUS, AND ARTICLES OF MANUFACTURE TO IMPROVE DIGITAL PRE-DISTORTION

#13
20240291508
2024-08-29

SYSTEMS AND METHODS FOR MULTIBAND LINEARIZATION ARCHITECTURE USING KERNEL REGRESSION

#14
20240283411
2024-08-22

DIGITAL PRE-DISTORTION FOR FREQUENCY RANGE 2 SYSTEMS

#15
20240063760
2024-02-22

PRACTICAL PREDISTORTION ARCHITECTURES FOR MULTIBAND RADIOS

#16
20230396219
2023-12-07

Signal amplification circuitry

#17
20230370937
2023-11-16

METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS

#18
20230319802
2023-10-05

Remotely reconfigurable distributed antenna system and methods

#19
20230308338
2023-09-28

Digital pre-distortion compensation in a wireless communications system

#20
20230216451
2023-07-06

LINEARIZATION OF A NON-LINEAR ELECTRONIC DEVICE

#21
20230118004
2023-04-20

Power Amplifiers and Methods of Controlling Same

#22
20230082415
2023-03-16

PHASE AND AMPLITUDE ERROR CORRECTION IN A TRANSMISSION CIRCUIT

#23
20230057192
2023-02-23

COMPENSATION CIRCUIT MODULE, POWER AMPLIFICATION ASSEMBLY, COMPENSATION METHOD AND DEVICE

#24
20230010043
2023-01-12

MULTI-COMPONENT DIGITAL PREDISTORTION

#25
20220394716
2022-12-08

REMOTELY RECONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHODS

#26
20220368289
2022-11-17

Method for determining filter coefficients and equalizer circuit

#27
20220360232
2022-11-10

Low-power approximate DPD actuator for 5G-new radio

#28
20220295487
2022-09-15

Remotely reconfigurable distributed antenna system and methods

#29
20220216834
2022-07-07

Digitally assisted radio frequency transmitter

#30
20220200540
2022-06-23

MODEL TRAINER FOR DIGITAL PRE-DISTORTER OF POWER AMPLIFIERS

#31
20220173703
2022-06-02

Systems and methods for device specification design and verification by error vector magnitude prediction

#32
20220115990
2022-04-14

POWER AMPLIFIER TIME-DELAY INVARIANT PREDISTORTION METHODS AND APPARATUS

#33
20220052653
2022-02-17

Multi-component digital predistortion

#34
20220007263
2022-01-06

METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS

#35
20210391832
2021-12-16

Machine learning based digital pre-distortion for power amplifiers

#36
20210345330
2021-11-04

REMOTELY RECONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHODS

#37
20210329527
2021-10-21

Distributed antenna system

#38
20210328555
2021-10-21

Low-power approximate DPD actuator for 5G-new radio

#39
20210314210
2021-10-07

SYSTEM AND METHOD FOR DIGITAL MEMORIZED PREDISTORTION FOR WIRELESS COMMUNICATION

#40
20210297294
2021-09-23

METHOD AND DEVICE FOR DIGITAL COMPENSATION OF DYNAMIC DISTORTION IN HIGH-SPEED TRANSMITTERS

#41
20210288682
2021-09-16

Wireless communication apparatus and coefficient updating method

#42
20210249997
2021-08-12

Digital predistortion low power implementation

#43
20210234515
2021-07-29

System and method of baseband linearization for a class G radiofrequency power amplifier

#44
20210226653
2021-07-22

Digital predistortion for advanced antenna system

#45
20210022140
2021-01-21

Remotely reconfigurable distributed antenna system and methods

#46
20200389899
2020-12-10

REMOTELY RECONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHODS

#47
20200373950
2020-11-26

Power adjustment method and apparatus

#48
20200366253
2020-11-19

Multi-band digital compensator for a non-linear system

#49
20200359383
2020-11-12

Remotely reconfigurable distributed antenna system and methods

#50
20200313631
2020-10-01

Power amplifier time-delay invariant predistortion methods and apparatus

#51
20200267732
2020-08-20

Remotely reconfigurable distributed antenna system and methods

#52
20200259465
2020-08-13

Digital predistortion adjustment based on determination of load condition characteristics

#53
20200252032
2020-08-06

Compensating for transmitter nonlinearities

#54
20200186103
2020-06-11

Polyphase digital signal predistortion in radio transmitter

#55
20200169937
2020-05-28

Method and system for baseband predistortion linearization in multi-channel wideband communication systems

#56
20200169277
2020-05-28

Digital pre-distortion technique for a circuit arrangement with a power amplifier

#57
20200169227
2020-05-28

Multi-band digital compensator for a non-linear system

#58
20200146015
2020-05-07

Remotely reconfigurable distributed antenna system and methods

#59
20200145033
2020-05-07

Digital predistortion for advanced antenna system

#60
20200136567
2020-04-30

Digital hybrid mode power amplifier system

#61
20200092787
2020-03-19

Distributed antenna system

#62
20200083914
2020-03-12

HIGH EFFICIENCY LINEARIZATION POWER AMPLIFIER FOR WIRELESS COMMUNICATION

#63
20200076379
2020-03-05

Transmitter, communication system, and method and program for controlling transmitter

#64
20200067466
2020-02-27

Wireless architectures and digital pre-distortion (DPD) techniques using closed loop feedback for phased array transmitters

#65
20200021253
2020-01-16

System and method for RF amplifiers

#66
20190348956
2019-11-14

Digital compensator for a non-linear system

#67
20190326860
2019-10-24

Digital pre-distortion for an amplifier

#68
20190288900
2019-09-19

System and method for digital memorized predistortion for wireless communication

#69
20190280654
2019-09-12

Method and system for linearizing an amplifier using transistor-level dynamic feedback

#70
20190222179
2019-07-18

Distortion compensation apparatus and distortion compensation method

#71
20190208523
2019-07-04

Remotely reconfigurable distributed antenna system and methods

#72
20190181807
2019-06-13

Power amplifier time-delay invariant predistortion methods and apparatus

#73
20190149103
2019-05-16

Stabilization of direct learning algorithm for wideband signals

#74
20190149096
2019-05-16

Closed-loop digital compensation scheme

#75
20190110239
2019-04-11

Distributed antenna system

#76
20190074797
2019-03-07

Linearization circuits and methods for multilevel power amplifier systems

#77
20190058447
2019-02-21

Behavioral Modeling Of Concurrent Multiband Power Amplifiers

#78
20180331662
2018-11-15

Method of reducing memory effect of power amplifier

#79
20180309465
2018-10-25

Mixed-mode digital predistortion

#80
20180287578
2018-10-04

Control system for a power amplifier

#81
20180287564
2018-10-04

Modulated supply amplifier with adjustable input parameter configuration

#82
20180279197
2018-09-27

METHOD AND SYSTEM FOR BASEBAND PREDISTORTION LINEARIZATION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS

#83
20180219578
2018-08-02

Crosstalk correction using pre-compensation

#84
20180175809
2018-06-21

Power amplifier operation

#85
20180138868
2018-05-17

METHOD AND SYSTEM FOR LINEARIZING AN AMPLIFIER USING TRANSISTOR-LEVEL DYNAMIC FEEDBACK

#86
20180123530
2018-05-03

Amplifiers

#87
20180115332
2018-04-26

Transmitter and distortion correction method

#88
20180115288
2018-04-26

ARITHMETIC METHOD, BASE STATION DEVICE, AND ARITHMETIC CIRCUIT

#89
20180102747
2018-04-12

DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM

#90
20180097530
2018-04-05

High efficiency linearization power amplifier for wireless communication

#91
20180054170
2018-02-22

DISTORTION COMPENSATION DEVICE AND COEFFICIENT UPDATE METHOD

#92
20180048267
2018-02-15

AMPLIFICATION DEVICE AND METHOD OF AMPLIFYING SIGNAL

#93
20180026587
2018-01-25

Stabilization of direct learning algorithm for wideband signals

#94
20170359029
2017-12-14

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

#95
20170353163
2017-12-07

Methods and devices for predistortion of signals

#96
20170338842
2017-11-23

Mixed-mode digital predistortion

#97
20170331435
2017-11-16

Radio apparatus and abnormality detecting method

#98
20170317686
2017-11-02

Signal modulation for radiofrequency communications

#99
20170293485
2017-10-12

Direct digital synthesis of signals using maximum likelihood bit-stream encoding

#100
20170279412
2017-09-28

Modulated supply amplifier with adjustable input parameter configuration

#101
20170257251
2017-09-07

Predistortion processing apparatus and method

#102
20170257068
2017-09-07

Systems and methods for linearizing operation of a power amplifier

#103
20170238318
2017-08-17

Remotely reconfigurable distributed antenna system and methods

#104
20170237455
2017-08-17

Analog predistorter core module and analog predistorter system

#105
20170230021
2017-08-10

Control system for a power amplifier

#106
20170133989
2017-05-11

Bias control for stacked transistor configuration

#107
20170111188
2017-04-20

PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor

#108
20170111014
2017-04-20

Modifiable signal adjustment devices for power amplifiers and corresponding methods and apparatus

#109
20170070897
2017-03-09

Remotely reconfigurable distributed antenna system and methods

#110
20170055198
2017-02-23

Distributed antenna system

#111
20170047900
2017-02-16

Adaptive self-bias

#112
20170040954
2017-02-09

Method and system for linearizing an amplifier using transistor-level dynamic feedback

#113
20170033969
2017-02-02

SYSTEM AND METHOD FOR DIGITAL MEMORIZED PREDISTORTION FOR WIRELESS COMMUNICATION

#114
20170005627
2017-01-05

Moving mean and magnitude dual path digital predistortion

#115
20160365950
2016-12-15

Direct digital synthesis of signals using maximum likelihood bit-stream encoding

#116
20160352290
2016-12-01

Circuits for linearizing an output signal of a non-linear component and related devices and methods

#117
20160329927
2016-11-10

Digital pre-distortion parameter obtaining method and pre-distortion system

#118
20160329867
2016-11-10

Amplifiers

#119
20160269210
2016-09-15

Method and system for baseband predistortion linearization in multi-channel wideband communication systems

#120
20160268976
2016-09-15

Sequential broadband doherty power amplifier with adjustable output power back-off

#121
20160268972
2016-09-15

WIRELESS COMMUNICATION DEVICE

#122
20160261241
2016-09-08

Behavioral model and predistorter for modeling and reducing nonlinear effects in power amplifiers

#123
20160241199
2016-08-18

Control systems and methods for power amplifiers operating in envelope tracking mode

#124
20160218675
2016-07-28

Distortion compensation device

#125
20160211810
2016-07-21

Amplifying stage working point determination

#126
20160204750
2016-07-14

Distortion compensation device and distortion compensation method

#127
20160190993
2016-06-30

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

#128
20160190989
2016-06-30

Optimization methods for amplifier with variable supply power

#129
20160164550
2016-06-09

Envelope tracking path delay fine tuning and calibration

#130
20160164469
2016-06-09

Amplifier dynamic bias adjustment for envelope tracking

#131
20160164468
2016-06-09

Amplifier dynamic bias adjustment for envelope tracking

#132
20160134446
2016-05-12

System and method for linearizing power amplifiers

#133
20160094187
2016-03-31

Modifiable signal adjustment devices for power amplifiers and corresponding methods and apparatus

#134
20160080082
2016-03-17

Remotely reconfigurable distributed antenna system and methods

#135
20160080013
2016-03-17

Adaptive ISO-gain pre-distortion for an RF power amplifier operating in envelope tracking

#136
20160072647
2016-03-10

Direct digital synthesis of signals using maximum likelihood bit-stream encoding

#137
20160065147
2016-03-03

Receivers for digital predistortion

#138
20160054995
2016-02-25

Performing lookup table operations on a single-instruction multiple data processor

#139
20160036394
2016-02-04

Power amplifier time-delay invariant predistortion methods and apparatus

#140
20160020791
2016-01-21

Systems and methods for increasing the effectiveness of digital pre-distortion in electronic communications

#141
20160014782
2016-01-14

Distributed antenna system

#142
20150372646
2015-12-24

Linearization circuits and methods for multilevel power amplifier systems

#143
20150358922
2015-12-10

Method and system for updating predistortion coefficient

#144
20150349814
2015-12-03

Distortion-compensation device and distortion-compensation method

#145
20150333710
2015-11-19

High efficiency linearization power amplifier for wireless communication

#146
20150326349
2015-11-12

System and method for digital memorized predistortion for wireless communication

#147
20150326190
2015-11-12

Radio frequency power amplifier non-linearity compensation

#148
20150318880
2015-11-05

Digital pre-distortion for high bandwidth signals

#149
20150280947
2015-10-01

Wireless transmission device

#150
20150280657
2015-10-01

ADAPTIVE DIGITAL PRE-DISTORTION

#151
20150270806
2015-09-24

Bias control for stacked transistor configuration

#152
20150229498
2015-08-13

Systems and methods to compensate for memory effects using enhanced memory polynomials

#153
20150207467
2015-07-23

Method and system for linearizing an amplifier using transistor-level dynamic feedback

#154
20150194936
2015-07-09

POWER AMPLIFIER ENVELOPE TRACKING

#155
20150172081
2015-06-18

Baseband envelope predistorter

#156
20150162881
2015-06-11

Augmented twin nonlinear two-box modeling and predistortion method for power amplifiers and transmitters

#157
20150146822
2015-05-28

Multi-path digital pre-distortion

#158
20150124904
2015-05-07

Distortion compensation apparatus, wireless communication system, and distortion compensation method

#159
20150111511
2015-04-23

Transmission apparatus and transmission method

#160
20150110222
2015-04-23

System and method for amplifying a signal

#161
20150092830
2015-04-02

Method and system for baseband predistortion linearization in multi-channel wideband communication systems

#162
20150077180
2015-03-19

Distortion compensation apparatus and distortion compensation method

#163
20150077179
2015-03-19

Distortion compensation apparatus, transmission apparatus, and distortion compensation method

#164
20150070089
2015-03-12

ADAPTIVE NONLINEAR MODEL LEARNING

#165
20150055731
2015-02-26

Digital Transmitter With Sample Rate Digital Predistortion

#166
20150054585
2015-02-26

Pre-distortion method, associated apparatus and non-transitory machine readable medium

#167
20150054582
2015-02-26

Control system for a power amplifier

#168
20150049843
2015-02-19

Combined Transmission Precompensation and Receiver Nonlinearity Mitigation

#169
20150043678
2015-02-12

Scalable digital predistortion system

#170
20150028947
2015-01-29

Distortion compensation apparatus and method

#171
20150016567
2015-01-15

Digital pre-distortion systems in transmitters

#172
20150015329
2015-01-15

Radio frequency composite Class-S power amplifier having discrete power control

#173
20150015328
2015-01-15

Pre-distortion method and associated apparatus and non-transitory machine readable medium

#174
20150015327
2015-01-15

Controller and method for controlling a signal processor

#175
20140376676
2014-12-25

Methods, devices, and algorithms for the linearization of nonlinear time variant systems and the synchronization of a plurality of such systems

#176
20140327481
2014-11-06

Digital hybrid mode power amplifier system

#177
20140313884
2014-10-23

Daisy-chained ring of remote units for a distributed antenna system

#178
20140306762
2014-10-16

System and method for digital memorized predistortion for wireless communication

#179
20140292406
2014-10-02

Signal predistortion for non-linear amplifier

#180
20140292403
2014-10-02

Power amplifier signal compensation

#181
20140286247
2014-09-25

Remotely reconfigureable distributed antenna system and methods

#182
20140269988
2014-09-18

Radio frequency domain digital pre-distortion

#183
20140266431
2014-09-18

Under-sampling digital pre-distortion architecture

#184
20140254720
2014-09-11

PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor

#185
20140225668
2014-08-14

Digital predistortion apparatus and method using the sum of absolute input signals for a non-identical number of delays

#186
20140219391
2014-08-07

High dynamic range AMAM predistortion

#187
20140187182
2014-07-03

Method and apparatus for calibrating an envelope tracking system

#188
20140184337
2014-07-03

Control systems and methods for power amplifiers operating in envelope tracking mode

#189
20140184336
2014-07-03

Amplifier dynamic bias adjustment for envelope tracking

#190
20140184335
2014-07-03

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

#191
20140184334
2014-07-03

Optimization methods for amplifier with variable supply power

#192
20140179248
2014-06-26

High efficiency linearization power amplifier for wireless communication

#193
20140145788
2014-05-29

Distortion compensation device and distortion compensation method

#194
20140133527
2014-05-15

Digital pre-distortion in a communication network

#195
20140108477
2014-04-17

Vector processor having instruction set with vector convolution function for fir filtering

#196
20140086367
2014-03-27

Maximum likelihood bit-stream generation and detection using M-algorithm and infinite impulse response filtering

#197
20140086356
2014-03-27

Software digital front end (SoftDFE) signal processing

#198
20140075162
2014-03-13

Digital processor having instruction set with complex exponential non-linear function

#199
20140064417
2014-03-06

Direct digital synthesis of signals using maximum likelihood bit-stream encoding

#200
20140050281
2014-02-20

Method and apparatus for controlling update of digital pre-distortion coefficient

#201
20140009224
2014-01-09

Minimum feedback radio architecture with digitally configurable adaptive linearization

#202
20130321078
2013-12-05

Distortion compensation apparatus and distortion compensation method

#203
20130315291
2013-11-28

Method and system for baseband predistortion linearization in multi-channel wideband communications systems

#204
20130272202
2013-10-17

Daisy-chained ring of remote units for a distributed antenna system

#205
20130271212
2013-10-17

Digital Predistorter (DPD) structure based on dynamic deviation reduction (DDR)-based volterra series

#206
20130259159
2013-10-03

Transmitter linearized in response to derivative signal and method therefor

#207
20130257531
2013-10-03

Amplifying device and method for controlling the same

#208
20130257530
2013-10-03

Pre-distortion for a radio frequency power amplifier

#209
20130257529
2013-10-03

Circuitry for reducing power consumption

#210
20130243125
2013-09-19

Transmission apparatus and transmission method

#211
20130243123
2013-09-19

Look up table-based sum predistorter for power amplifification with concurrent dual band inputs

#212
20130223565
2013-08-29

Transmitter linearized using look-up table with unadaptable data and method therefor

#213
20130147550
2013-06-13

Power amplifier time-delay invariant predistortion methods and apparatus

#214
20130147538
2013-06-13

DIGITAL PRE-DISTORTION DEVICE AND PRE-DISTORTION METHOD THEREOF

#215
20130142284
2013-06-06

Predistortion circuit, wireless communication unit and method for coefficient estimation

#216
20130137384
2013-05-30

Communication system with band, mode, impedance and linearization self-adjustment

#217
20130117342
2013-05-09

Combined RF equalizer and I/Q imbalance correction

#218
20130114761
2013-05-09

Multi-stage crest factor reduction (CFR) for multi-channel multi-standard radio

#219
20130076418
2013-03-28

System and Method for Calibration of Timing Mismatch for Envelope Tracking Transmit Systems

#220
20130040587
2013-02-14

Distortion compensation device, distortion compensation method, and radio transmitter

#221
20130015917
2013-01-17

Distortion compensation apparatus, transmitter, and distortion compensation method

#222
20130009702
2013-01-10

Pre-distortion for a radio frequency power amplifier

#223
20130009701
2013-01-10

Power amplifier pre-distortion

#224
20130005283
2013-01-03

Multi-dimensional volterra series transmitter linearization

#225
20120326777
2012-12-27

Amplifier circuit and radio communication apparatus

#226
20120321018
2012-12-20

Digital pre-distortion processing method and apparatus

#227
20120299644
2012-11-29

System and a method for amplifying a signal by multiple non-linear power amplifiers

#228
20120288030
2012-11-15

Distortion compensation device and distortion compensating method

#229
20120286867
2012-11-15

Amplifier apparatus, radio transmitting apparatus including same, and method of adjusting gain of amplifier apparatus

#230
20120286865
2012-11-15

Pre-distortion architecture for compensating non-linear effects

#231
20120286863
2012-11-15

Apparatus and method of digital predistortion for power amplifiers with dynamic nonlinearities

#232
20120281772
2012-11-08

Digital output power measurement in radio communication systems

#233
20120275545
2012-11-01

Distortion compensation apparatus and distortion compensation method

#234
20120269293
2012-10-25

RF transmitter architecture, integrated circuit device, wireless communication unit and method therefor

#235
20120256687
2012-10-11

Pre-distortion for a radio frequency power amplifier

#236
20120230382
2012-09-13

Baseband-derived RF digital predistortion

#237
20120229209
2012-09-13

Power amplification device, transmitter, and power amplification control method

#238
20120229206
2012-09-13

Minimum feedback radio architecture with digitally configurable adaptive linearization

#239
20120219048
2012-08-30

Joint adaptive bias point adjustment and digital pre-distortion for power amplifier

#240
20120202440
2012-08-09

Distortion compensation device, transmitter, and distortion compensation method

#241
20120195352
2012-08-02

Fast envelope system calibration

#242
20120147993
2012-06-14

Method and system for baseband predistortion linearization in multi-channel wideband communication systems

#243
20120147991
2012-06-14

Distortion compensation device, distortion compensation method and wireless apparatus

#244
20120135695
2012-05-31

High efficiency linearization power amplifier for wireless communication

#245
20120128098
2012-05-24

Apparatus and method for digital predistortion of non-linear amplifiers

#246
20120126898
2012-05-24

Amplifying apparatus

#247
20120112847
2012-05-10

Polar modulation transmission circuit and polar modulation transmission method

#248
20120106676
2012-05-03

Transmitter linearized in response to signal magnitude derivative parameter and method therefor

#249
20120098596
2012-04-26

Power amplifier apparatus, distortion compensation coefficient updating method, and transmission apparatus

#250
20120068768
2012-03-22

Transmission apparatus and distortion compensation method

#251
20120039320
2012-02-16

Remotely reconfigurable distributed antenna system and methods

#252
20120039254
2012-02-16

Daisy-chained ring of remote units for a distributed antenna system

#253
20120034887
2012-02-09

Transmitter linearized using cartesian-processed look-up table and method therefor

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