JP5250636B2 - ベースバンド導出rfデジタルプリディストーション - Google Patents
ベースバンド導出rfデジタルプリディストーション Download PDFInfo
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- JP5250636B2 JP5250636B2 JP2010536550A JP2010536550A JP5250636B2 JP 5250636 B2 JP5250636 B2 JP 5250636B2 JP 2010536550 A JP2010536550 A JP 2010536550A JP 2010536550 A JP2010536550 A JP 2010536550A JP 5250636 B2 JP5250636 B2 JP 5250636B2
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- 238000013459 approach Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
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- 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
-
- 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
- H03F1/3294—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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/204—A hybrid coupler being used at the output of an amplifier circuit
-
- 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
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/57—Separate feedback of real and complex signals being present
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03356—Baseband transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
- H04L2025/03439—Fixed structures
- H04L2025/03445—Time domain
- H04L2025/03471—Tapped delay lines
- H04L2025/03477—Tapped delay lines not time-recursive
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Amplifiers (AREA)
Description
F1{z}=α11+α12z+α13z2+...+α1NzN−1
および
F2{z}=α11+α12z+α13z2+...+α1NzN−1
と表現されることができる。
F(t-τd)=a1+a3|Xe(t-τd)|2=a1+1/2a3+1/2a3cos[(ω2-ω1)t+ω1τd] (1)
ここでXe(t)は入力信号のエンベロープ、aは多項式の複素係数、τdは遅延ミスマッチ、と記載することができる。プリディストーション関数は、3次相互変調ディストーション(IMD)までを補償するために周波数間隔と同じ帯域幅を要求することを(1)から見ることができる。プリディストーション入力RF信号XPD(t)はそれから、
XPD(t)=X(t)F(t-τd) (2)
と表現することができる。
XPD(t)=b1S+b3SU_IMD3∠-(ω2-ω1)τd+b3SL_IMD3∠(ω2-ω1)τd (3)
ここでbは複素係数であり、S、SU_IMD3、SL_IMD3はそれぞれ2トーンRF入力信号、3次上位IMDおよび下位IMD成分を表記する、と式で表すことができる。(3)から、τdに依って、上位IMD成分の位相は(ω2−ω1)τdで減少し、下位IMD部分の位相は同量で増加する。
Claims (3)
- ベースバンド信号を受け取るベースバンド入力と、
RFパワー増幅器に信号を提供するRF出力と、
ベースバンド信号からプリディストーション関数を導出し、プリディストーション信号を生成するロジックであって、生成されたプリディストーション信号は、複数の複素係数、少なくとも1つの2トーンRF入力信号、3次上位相互変調ディストーション成分、下位相互変調成分、および遅延ミスマッチ成分に、少なくとも部分的に基づいているものと、
プリディストーション関数に応答し、RF出力に接続され、プリディストーション信号をRF出力に印加するベクトル変調器と、
を含む、RFパワー増幅器と共に用いるための広帯域プリディストーションシステム。 - ロジックがルックアップテーブルを含む、請求項1の広帯域プリディストーションシステム。
- ロジックが多項式計算を含む、請求項1の広帯域プリディストーションシステム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1241607P | 2007-12-07 | 2007-12-07 | |
US61/012,416 | 2007-12-07 | ||
PCT/IB2008/003944 WO2009109808A2 (en) | 2007-12-07 | 2008-12-08 | Baseband-derived rf digital predistortion |
Publications (2)
Publication Number | Publication Date |
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JP2011511493A JP2011511493A (ja) | 2011-04-07 |
JP5250636B2 true JP5250636B2 (ja) | 2013-07-31 |
Family
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JP2010536550A Active JP5250636B2 (ja) | 2007-12-07 | 2008-12-08 | ベースバンド導出rfデジタルプリディストーション |
Country Status (6)
Country | Link |
---|---|
US (3) | US8213884B2 (ja) |
EP (1) | EP2248255A4 (ja) |
JP (1) | JP5250636B2 (ja) |
KR (1) | KR101669173B1 (ja) |
CN (1) | CN102150361B (ja) |
WO (1) | WO2009109808A2 (ja) |
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US20120230382A1 (en) | 2012-09-13 |
US8548403B2 (en) | 2013-10-01 |
JP2011511493A (ja) | 2011-04-07 |
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WO2009109808A3 (en) | 2011-04-28 |
CN102150361A (zh) | 2011-08-10 |
US8213884B2 (en) | 2012-07-03 |
KR101669173B1 (ko) | 2016-10-25 |
KR20100108546A (ko) | 2010-10-07 |
US8401499B2 (en) | 2013-03-19 |
US20130214861A1 (en) | 2013-08-22 |
CN102150361B (zh) | 2016-11-09 |
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