JP2014523171A - プレディストーション回路、無線通信ユニット、及び係数推定のための方法 - Google Patents
プレディストーション回路、無線通信ユニット、及び係数推定のための方法 Download PDFInfo
- Publication number
- JP2014523171A JP2014523171A JP2014517440A JP2014517440A JP2014523171A JP 2014523171 A JP2014523171 A JP 2014523171A JP 2014517440 A JP2014517440 A JP 2014517440A JP 2014517440 A JP2014517440 A JP 2014517440A JP 2014523171 A JP2014523171 A JP 2014523171A
- Authority
- JP
- Japan
- Prior art keywords
- digital
- correction
- output
- input signal
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 37
- 238000004891 communication Methods 0.000 title claims description 33
- 230000009021 linear effect Effects 0.000 claims abstract description 52
- 238000012937 correction Methods 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000013598 vector Substances 0.000 claims description 5
- 230000003446 memory effect Effects 0.000 claims description 4
- 238000012549 training Methods 0.000 description 14
- 230000003595 spectral effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000009795 derivation Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009022 nonlinear effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229920005994 diacetyl cellulose Polymers 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000006993 memory improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3258—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits based on polynomial terms
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3294—Acting on the real and imaginary components of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
- H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
- H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3212—Using a control circuit to adjust amplitude and phase of a signal in a signal path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3224—Predistortion being done for compensating memory effects
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Algebra (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Abstract
Description
本願は、2011年10月20日付けで出願された米国特許仮出願第61/549508号及び2012年9月13日付けで出願された米国特許出願第13/612872号に基づく優先権を主張する。優先権の基礎となるそれらの出願の内容は、参照により本願に援用される。
Claims (20)
- 高調波の存在下で歪み補正を提供するプレディストーション回路であって、
デジタル入力信号を受信する入力部と、
非線形デバイスへ動作上結合されて高調波項を生成するアップコンバージョン要素へデジタル出力信号を供給する出力部と、
前記非線形デバイスの出力へ動作上結合されて該非線形デバイスから出力無線周波数信号を受信し、前記デジタル入力信号へ適用されるデジタル補正を決定するよう配置されるプロセッサと
を有し、
前記プロセッサは更に、同じ次数の項が異なる係数を有するところの前記デジタル入力信号の複数の同相及び直交の交差項を有する前記デジタル補正を決定するよう配置される、
プレディストーション回路。 - 前記プロセッサから前記デジタル補正を受け取り、該補正を前記デジタル入力信号に適用するプレディストータ
を更に有する請求項1に記載のプレディストーション回路。 - 前記非線形デバイスは、前記出力無線周波数信号が前記アップコンバージョン要素によって生成される高調波項を有するような広帯域非線形増幅器である、
請求項2に記載のプレディストーション回路。 - 前記アップコンバージョン要素は、パッシブミキサ、ハードスイッチドミキサを含むグループの中の少なくとも1つである、
請求項1に記載のプレディストーション回路。 - 前記プロセッサは更に、前記非線形デバイスの少なくとも1つのメモリ効果を更に利用する前記デジタル補正を決定するよう配置される、
請求項1に記載のプレディストーション回路。 - 夫々の奇数次高調波項へ適用される前記複数の異なる係数は、同相補正係数と直交補正係数との間の対称関係を有する、
請求項6に記載のプレディストーション回路。 - デジタル入力信号を受信するミキサと、
前記ミキサへ動作上結合され、複数の高調波項を有するミキサ出力信号を受信して該ミキサ出力信号から非線形出力信号を生成する少なくとも1つの非線形デバイスと、
前記非線形デバイスの出力へ動作上結合され、該非線形デバイスから出力無線周波数信号を受信し、前記デジタル入力信号へ適用されるデジタル補正を決定するよう配置されるプロセッサと
を有するプレディストーション回路を有し、
前記プロセッサは更に、同じ次数の項が異なる係数を有するところの前記デジタル入力信号の複数の同相及び直交の交差項を有する前記デジタル補正を決定するよう配置される、
無線通信ユニット。 - 前記プレディストーション回路は、前記プロセッサから前記デジタル補正を受け取り、該補正を前記デジタル入力信号に適用するプレディストータを更に有する、
請求項8に記載の無線通信ユニット。 - 前記非線形デバイスは、前記出力無線周波数信号が前記アップコンバージョン要素によって生成される高調波項を有するような広帯域非線形増幅器である、
請求項9に記載の無線通信ユニット。 - 前記アップコンバージョン要素は、パッシブミキサ、ハードスイッチドミキサを含むグループの中の少なくとも1つである、
請求項8に記載の無線通信ユニット。 - 前記プロセッサは更に、前記非線形デバイスの少なくとも1つのメモリ効果を更に利用する前記デジタル補正を決定するよう配置される、
請求項8に記載の無線通信ユニット。 - 夫々の奇数次高調波項へ適用される前記複数の異なる係数は、同相補正係数と直交補正係数との間の対称関係を有する、
請求項13に記載の無線通信ユニット。 - デジタル入力信号を受信するステップと、
非線形デバイスへ動作上結合されるミキサへデジタル出力信号を供給するステップと、
前記非線形デバイスから出力無線周波数信号を受信するステップと、
前記デジタル入力信号へ適用されるデジタル補正を決定するステップと、
前記デジタル補正が、同じ次数の項が異なる係数を有するところの前記デジタル入力信号の複数の同相及び直交の交差項を有するかどうかを決定するステップと
を有する、回路において高調波歪みを補正する方法。 - 前記回路は、前記プロセッサから前記デジタル補正を受け取り、該補正を前記デジタル入力信号に適用するプレディストータを更に有する、
請求項15に記載の方法。 - 前記非線形デバイスは、前記出力無線周波数信号が前記アップコンバージョン要素によって生成される高調波項を有するような広帯域非線形増幅器である、
請求項16に記載の方法。 - 前記非線形デバイスの少なくとも1つのメモリ効果を更に利用する前記デジタル補正を決定するステップ
を更に有する請求項15に記載の方法。 - 夫々の奇数次高調波項へ適用される前記複数の異なる係数は、同相補正係数と直交補正係数との間の対称関係を有する、
請求項19に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161549508P | 2011-10-20 | 2011-10-20 | |
US61/549,508 | 2011-10-20 | ||
US13/612,872 US9093958B2 (en) | 2011-10-20 | 2012-09-13 | Predistortion circuit, wireless communication unit and method for coefficient estimation |
US13/612,872 | 2012-09-13 | ||
PCT/CN2012/083151 WO2013056660A1 (en) | 2011-10-20 | 2012-10-18 | Predistortion circuit, wireless communication unit and method for coefficient estimation |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014523171A true JP2014523171A (ja) | 2014-09-08 |
JP5801481B2 JP5801481B2 (ja) | 2015-10-28 |
Family
ID=48140357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014517440A Active JP5801481B2 (ja) | 2011-10-20 | 2012-10-18 | プレディストーション回路、無線通信ユニット、及び係数推定のための方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9093958B2 (ja) |
EP (1) | EP2740212A4 (ja) |
JP (1) | JP5801481B2 (ja) |
CN (1) | CN103117971B (ja) |
TW (1) | TW201328171A (ja) |
WO (1) | WO2013056660A1 (ja) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105099972B (zh) * | 2012-12-11 | 2018-05-04 | 华为技术有限公司 | 发射机的发射通道间干扰消除方法及装置 |
TWI560998B (en) * | 2013-07-11 | 2016-12-01 | Realtek Semiconductor Corp | Pre-distortion method, pre-distortion apparatus and machine readable medium |
US9184784B2 (en) * | 2014-03-10 | 2015-11-10 | Texas Instruments Incorporated | Method and apparatus for digital predistortion for a switched mode power amplifier |
JP2016001846A (ja) * | 2014-06-12 | 2016-01-07 | 富士通株式会社 | 歪み補償装置及び歪み補償方法 |
BR112017008705A2 (pt) * | 2014-11-22 | 2018-02-27 | Ericsson Telefon Ab L M | circuito, dispositivo de processamento de sinal digital, transceptor de ligação por rádio, método para linearizar um sinal de saída, e, programa de computador. |
DE102014119625A1 (de) * | 2014-12-23 | 2016-06-23 | Intel IP Corporation | Schaltung und Verfahren zum Bereitstellen eines Radiofrequenzsignals |
CN108141184B (zh) * | 2015-05-29 | 2021-08-31 | Qorvo美国公司 | 线性功率放大器 |
TWI604699B (zh) | 2015-12-31 | 2017-11-01 | 瑞昱半導體股份有限公司 | 具牽引效應補償機制的發射器 |
US10419046B2 (en) * | 2016-05-26 | 2019-09-17 | Mediatek Singapore Pte. Ltd | Quadrature transmitter, wireless communication unit, and method for spur suppression |
CN108540242B (zh) * | 2018-01-05 | 2021-06-25 | 中国传媒大学广州研究院 | 一种广播发射机谐波失真指标测量方法及装置 |
US10432240B1 (en) | 2018-05-22 | 2019-10-01 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise |
US11063623B2 (en) * | 2018-11-28 | 2021-07-13 | Texas Instruments Incorporated | Baseband corrector for RF non-linearity in zero-IF receiver |
US10763905B1 (en) * | 2019-06-07 | 2020-09-01 | Micron Technology, Inc. | Wireless devices and systems including examples of mismatch correction scheme |
CN110611534B (zh) * | 2019-09-10 | 2021-03-23 | 三维通信股份有限公司 | 光纤直放站及其无源互调信号的检测方法、系统 |
US10972139B1 (en) | 2020-04-15 | 2021-04-06 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise with neural networks or recurrent neural networks |
US11496341B2 (en) | 2020-08-13 | 2022-11-08 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating I/Q imbalance with neural networks or recurrent neural networks |
TWI819917B (zh) * | 2022-12-07 | 2023-10-21 | 緯創資通股份有限公司 | 前置補償方法及其前置補償電路 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002026998A (ja) * | 2000-07-11 | 2002-01-25 | Matsushita Electric Ind Co Ltd | 歪補償回路及び方法 |
JP2003174332A (ja) * | 2001-12-05 | 2003-06-20 | Hitachi Ltd | プリディストーション型増幅装置 |
JP2006279780A (ja) * | 2005-03-30 | 2006-10-12 | Matsushita Electric Ind Co Ltd | 歪み補償装置及び歪み補償方法 |
JP2010157898A (ja) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | 歪補償装置及び方法 |
JP2011182068A (ja) * | 2010-02-26 | 2011-09-15 | Ntt Docomo Inc | べき級数型ディジタルプリディストータとその歪補償制御方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI990680A (fi) * | 1999-03-26 | 2000-09-27 | Nokia Networks Oy | I/Q-modulaattorin epälineaarisuuden korjaus |
US6246286B1 (en) * | 1999-10-26 | 2001-06-12 | Telefonaktiebolaget Lm Ericsson | Adaptive linearization of power amplifiers |
GB2376613B (en) | 2001-06-15 | 2005-01-05 | Wireless Systems Int Ltd | Methods and apparatus for signal distortion correction |
US7203247B2 (en) | 2001-07-23 | 2007-04-10 | Agere Systems Inc. | Digital predistortion technique for WCDMA wireless communication system and method of operation thereof |
US7026871B2 (en) | 2003-07-03 | 2006-04-11 | Icefyre Semiconductor, Inc. | Adaptive predistortion for a transmit system |
US7139536B2 (en) | 2003-12-02 | 2006-11-21 | Mediatek Inc. | Method and apparatus for I/Q imbalance calibration of a transmitter system |
US7469491B2 (en) | 2004-01-27 | 2008-12-30 | Crestcom, Inc. | Transmitter predistortion circuit and method therefor |
US7113036B2 (en) | 2004-04-15 | 2006-09-26 | Agere Systems Inc. | Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters |
DE102005006162B3 (de) | 2005-02-10 | 2006-08-17 | Infineon Technologies Ag | Sende-/Empfangseinrichtung mit einem eine einstellbare Vorverzerrung aufweisenden Polar-Modulator |
US8639197B2 (en) | 2008-03-25 | 2014-01-28 | Broadcom Corporation | Method and system to prevent harmonics from causing distortion in a communications system |
US8000661B2 (en) | 2008-08-26 | 2011-08-16 | Mediatek Inc. | Communication system with frequency-adaptive predistorter design |
US8670501B2 (en) | 2009-12-09 | 2014-03-11 | Texas Instruments Incorporated | Digital pre-distortion of non-linear systems with reduced bandwidth feedback |
CN102118334B (zh) | 2010-11-29 | 2013-04-10 | 大唐移动通信设备有限公司 | 一种数字预失真处理方法及装置 |
-
2012
- 2012-09-13 US US13/612,872 patent/US9093958B2/en active Active
- 2012-10-16 CN CN201210392227.6A patent/CN103117971B/zh active Active
- 2012-10-18 JP JP2014517440A patent/JP5801481B2/ja active Active
- 2012-10-18 WO PCT/CN2012/083151 patent/WO2013056660A1/en unknown
- 2012-10-18 EP EP12842489.2A patent/EP2740212A4/en not_active Withdrawn
- 2012-10-19 TW TW101138815A patent/TW201328171A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002026998A (ja) * | 2000-07-11 | 2002-01-25 | Matsushita Electric Ind Co Ltd | 歪補償回路及び方法 |
JP2003174332A (ja) * | 2001-12-05 | 2003-06-20 | Hitachi Ltd | プリディストーション型増幅装置 |
JP2006279780A (ja) * | 2005-03-30 | 2006-10-12 | Matsushita Electric Ind Co Ltd | 歪み補償装置及び歪み補償方法 |
JP2010157898A (ja) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | 歪補償装置及び方法 |
JP2011182068A (ja) * | 2010-02-26 | 2011-09-15 | Ntt Docomo Inc | べき級数型ディジタルプリディストータとその歪補償制御方法 |
Also Published As
Publication number | Publication date |
---|---|
US9093958B2 (en) | 2015-07-28 |
EP2740212A4 (en) | 2015-06-10 |
JP5801481B2 (ja) | 2015-10-28 |
CN103117971B (zh) | 2016-09-07 |
WO2013056660A1 (en) | 2013-04-25 |
EP2740212A1 (en) | 2014-06-11 |
TW201328171A (zh) | 2013-07-01 |
US20130142284A1 (en) | 2013-06-06 |
CN103117971A (zh) | 2013-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5801481B2 (ja) | プレディストーション回路、無線通信ユニット、及び係数推定のための方法 | |
CN102948071B (zh) | 调制不可知的数字混合模式功率放大器系统及方法 | |
JP6023205B2 (ja) | デュアルバンド送信機におけるデジタル事前歪みのためのシステム及び方法 | |
US9374044B2 (en) | Architecture of nonlinear RF filter-based transmitter | |
US20030035494A1 (en) | Digital predistortion technique for WCDMA wireless communication system and method of operation thereof | |
US9306506B1 (en) | Apparatus and methods for dual loop power amplifier digital pre-distortion systems | |
US8649745B2 (en) | Adaptive predistortion for a non-linear subsystem based on a model as a concatenation of a non-linear model followed by a linear model | |
US9935590B2 (en) | Mixer impairment correction based on volterra series | |
CN101459636A (zh) | 自适应预失真方法 | |
JP2006509378A (ja) | ベースバンド変換を使用して送信機の性能を改善する方法および装置 | |
WO2012175041A1 (en) | Rf transmitter architecture, integrated circuit device, wireless communication unit and method therefor | |
Abi Hussein et al. | Digital predistortion for RF power amplifiers: State of the art and advanced approaches | |
Boo et al. | Digitally assisted feedforward compensation of Cartesian-feedback power-amplifier systems | |
TWI390839B (zh) | 功率放大器的失真校正裝置與方法 | |
Collados et al. | A low-current digitally predistorted direct-conversion transmitter with 25% duty-cycle passive mixer | |
US9819318B2 (en) | Architecture of a low bandwidth predistortion system for non-linear RF components | |
Chung et al. | Open-loop digital predistortion using Cartesian feedback for adaptive RF power amplifier linearization | |
Yu | Contributions to digital predistortion of radio-frequency power amplifiers for wireless applications | |
WO2019035841A1 (en) | TRANSCEIVERS FOR WIRELESS COMMUNICATION SYSTEM, MOBILE DEVICE, AND METHOD FOR IMPROVING TRANSMITTER-BUTTOCK CLAMP CALIBRATION ACCURACY | |
Pham | Contribution to dimensionality reduction of digital predistorter behavioral models for RF power amplifier linearization | |
Ceylan | Linearization of power amplifiers by means of digital predistortion | |
EP2104998B1 (en) | Wireless communication unit, linearised transmitter circuit and method of linearising therein | |
Chatrath | Behavioral Modeling of Mixerless Three-Way Amplitude Modulator-Based Transmitter | |
Coelho et al. | Implementation and simulation of the impact of mixer phase mismatch in Cartesian feedback linearization systems | |
TWI847814B (zh) | 數位預失真電路以及用來在數位預失真電路中減少裁切雜訊的方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20141121 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20141224 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20150312 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150728 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150826 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5801481 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |