JP2016508300A - 動的な電力及び周波数分配を備えた信号のためのクレストファクタ低減 - Google Patents
動的な電力及び周波数分配を備えた信号のためのクレストファクタ低減 Download PDFInfo
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- JP2016508300A JP2016508300A JP2015544131A JP2015544131A JP2016508300A JP 2016508300 A JP2016508300 A JP 2016508300A JP 2015544131 A JP2015544131 A JP 2015544131A JP 2015544131 A JP2015544131 A JP 2015544131A JP 2016508300 A JP2016508300 A JP 2016508300A
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- 230000009467 reduction Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000003595 spectral effect Effects 0.000 claims description 10
- 230000004044 response Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 description 10
- 238000001228 spectrum Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/2623—Reduction thereof by clipping
- H04L27/2624—Reduction thereof by clipping by soft clipping
-
- 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
- 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
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- 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
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0425—Circuits with power amplifiers with linearisation using predistortion
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Noise Elimination (AREA)
- Amplifiers (AREA)
Abstract
Description
a=[a1,a2,a3,・・・,aN]
w=[w1,w2,w3,・・・,wN]
out=[a1*w1,a2*w2,・・・,aN*wN]
ここで、wは重みベクトルである。
Claims (7)
- クレストファクタ低減(CFR)フィルタを演算する方法であって、
入力信号を受信すること、
選択可能な長さのウィンドウを選択すること、
選択されたウィンドウ内のデータに対し高速フーリエ変換(FFT)を演算すること、
その結果の振幅二乗(magnitude square)を演算すること、
選択可能な数のサンプルを用いて前記結果の平均を演算すること、
前記平均振幅二乗の二乗根を演算すること、
前記二乗根の逆FFTを演算すること、
前記逆FFTの結果を正規化して、CFR相殺パルスを生成すること、及び
前記CFR相殺パルスを前記入力信号に適用すること、
を含む、方法。 - 請求項1に記載の方法であって、128ポイントFFT、256ポイントFFT、又は512ポイントFFTの一つが演算される、方法。
- 請求項1に記載の方法であって、平均化されるべきFFT結果の数が、2の二乗ずつである、方法。
- 請求項1に記載の方法であって、更に、
複数の入力信号を受信する工程、
各ストリームのための前記CFR相殺パルスを独立して演算すること、
前記入力のノイズレベルの変化を許容するために前記複数のCFR相殺パルスをスケーリングする工程、及び
前記複数のスケーリングされた相殺パルスを組み合わせる工程、
を含む、方法。 - 請求項1に記載の方法であって、PSD(パワースペクトル密度)が、
時間ドメインウィンドウをデータの1つのブロックに適用すること、
前記ウィンドウに対しFFT(高速フーリエ変換)を演算すること、
前記FFTの結果の振幅二乗を演算すること、及び
複数のブロックにわたり結果を平均化すること、
により演算される、方法。 - 請求項1に記載の方法であって、次のように重み関数を適用することにより周波数応答がシェーピングされ、
a=[a1,a2,a3,・・・,aN]
w=[w1,w2,w3,・・・,wN]
out=[a1*w1,a2*w2,・・・,aN*wN]
ここで、wが重みベクトルであり、aがPSDである、
方法。 - クレストファクタ低減(CFR)フィルタを演算する方法であって、
複数の入力信号を受信すること、
処理されている前記複数の信号のための初期相殺パルスをストアすること、
各このような信号の周波数位置をストアすること、
前記初期相殺パルスを、前記信号の以前ストアされた周波数位置まで周波数シフトすること、
前記信号の電力を動的に測定すること、
周波数シフトされた相殺パルスを、適用可能な信号の前記動的に測定された電力によって 利得調節すること、
その結果の相殺パルスを合計すること、
その結果の合成相殺パルスを正規化すること、及び
前記相殺パルスを前記入力信号に適用すること、
を含む、方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/683,019 US8971464B2 (en) | 2012-11-21 | 2012-11-21 | Crest factor reduction for signals with dynamic power and frequency distribution |
US13/683,019 | 2012-11-21 | ||
PCT/US2013/071249 WO2014081938A1 (en) | 2012-11-21 | 2013-11-21 | Crest factor reduction for signals with dynamic power and frequency distribution |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2016508300A true JP2016508300A (ja) | 2016-03-17 |
JP2016508300A5 JP2016508300A5 (ja) | 2017-01-05 |
JP6393688B2 JP6393688B2 (ja) | 2018-09-19 |
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JP2015544131A Active JP6393688B2 (ja) | 2012-11-21 | 2013-11-21 | 動的な電力及び周波数分配を備えた信号のためのクレストファクタ低減 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8971464B2 (ja) |
JP (1) | JP6393688B2 (ja) |
CN (1) | CN104769902B (ja) |
WO (1) | WO2014081938A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021164000A (ja) * | 2020-03-30 | 2021-10-11 | 古河電気工業株式会社 | 送信システムおよびピーク抑圧方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9209841B2 (en) * | 2014-01-28 | 2015-12-08 | Scintera Networks Llc | Adaptively controlled digital pre-distortion in an RF power amplifier using an integrated signal analyzer with enhanced analog-to-digital conversion |
US10003489B2 (en) * | 2016-08-12 | 2018-06-19 | Qualcomm Incorporated | Communication device using a spectral shaped low peak-to-average power discrete Fourier transform waveform |
US10594530B2 (en) * | 2018-05-29 | 2020-03-17 | Qualcomm Incorporated | Techniques for successive peak reduction crest factor reduction |
CN108880636A (zh) * | 2018-07-17 | 2018-11-23 | 电子科技大学 | 一种基于混合循环前缀的mimo-ofdm功率分配方法 |
CN109450405B (zh) * | 2018-10-31 | 2022-09-16 | 山东鲁软数字科技有限公司智慧能源分公司 | 一种应用于ad采集中的复合式软件滤波方法及系统 |
CN112477874B (zh) * | 2020-11-26 | 2022-03-15 | 东风商用车有限公司 | 一种方向盘离手检测方法及车道保持辅助驾驶系统 |
US11770284B1 (en) * | 2022-05-23 | 2023-09-26 | Meta Platforms, Inc. | Per carrier scaling of a cancellation pulse of a multi-carrier signal |
Citations (3)
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US20060176969A1 (en) * | 2005-02-10 | 2006-08-10 | Samsung Electronics Co., Ltd. | Apparatus and method for reducing the crest factor of single carrier or multi-carrier signals |
JP2008054193A (ja) * | 2006-08-28 | 2008-03-06 | Nippon Hoso Kyokai <Nhk> | 回り込みキャンセラ |
US20100158166A1 (en) * | 2008-12-23 | 2010-06-24 | Texas Instruments, Inc. | Noise Injection Circuit and Method for Signal Processing |
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US7196257B2 (en) * | 2002-12-13 | 2007-03-27 | William Marsh Rice University | Computer aided piano voicing |
GB2401516A (en) * | 2003-04-17 | 2004-11-10 | Univ Southampton | Peak-to-average power ratio reduction by subtracting shaped pulses from a baseband signal |
US7142831B2 (en) * | 2003-12-18 | 2006-11-28 | Kiomars Anvari | Crest factor reduction and amplitude pre-distortion for multi-carrier signals |
US20070217527A1 (en) | 2006-03-20 | 2007-09-20 | Beceem Communications, Inc. | Method and system for determining channel response in a block transmission system |
US7839951B2 (en) * | 2007-04-05 | 2010-11-23 | Microelectronics Technology Inc. | Dynamic crest factor reduction system |
GB2477986C (en) | 2010-02-22 | 2013-12-25 | Toshiba Res Europ Ltd | Method and apparatus for crest factor reduction |
GB201005162D0 (en) | 2010-03-29 | 2010-05-12 | Cambridge Silicon Radio Ltd | An efficient ofdm peak reduction algorithm |
CN101969423A (zh) * | 2010-10-13 | 2011-02-09 | 新邮通信设备有限公司 | 一种峰值因子消减方法和装置以及一种射频拉远系统 |
US8599961B2 (en) * | 2010-10-14 | 2013-12-03 | KATREIN-Werke KG | Crest factor reduction method and circuit for a multi-carrier signal |
-
2012
- 2012-11-21 US US13/683,019 patent/US8971464B2/en active Active
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2013
- 2013-11-21 JP JP2015544131A patent/JP6393688B2/ja active Active
- 2013-11-21 CN CN201380056827.8A patent/CN104769902B/zh active Active
- 2013-11-21 WO PCT/US2013/071249 patent/WO2014081938A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060176969A1 (en) * | 2005-02-10 | 2006-08-10 | Samsung Electronics Co., Ltd. | Apparatus and method for reducing the crest factor of single carrier or multi-carrier signals |
JP2008054193A (ja) * | 2006-08-28 | 2008-03-06 | Nippon Hoso Kyokai <Nhk> | 回り込みキャンセラ |
US20100158166A1 (en) * | 2008-12-23 | 2010-06-24 | Texas Instruments, Inc. | Noise Injection Circuit and Method for Signal Processing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021164000A (ja) * | 2020-03-30 | 2021-10-11 | 古河電気工業株式会社 | 送信システムおよびピーク抑圧方法 |
Also Published As
Publication number | Publication date |
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US20140140452A1 (en) | 2014-05-22 |
CN104769902B (zh) | 2018-09-21 |
CN104769902A (zh) | 2015-07-08 |
WO2014081938A1 (en) | 2014-05-30 |
JP6393688B2 (ja) | 2018-09-19 |
US8971464B2 (en) | 2015-03-03 |
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