JP2014526863A - マルチチャネル広帯域通信システムにおいてデジタルプリディストーションの帯域幅を増大するシステム及び方法 - Google Patents
マルチチャネル広帯域通信システムにおいてデジタルプリディストーションの帯域幅を増大するシステム及び方法 Download PDFInfo
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- 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
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- 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
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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
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
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- 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
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
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- 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
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- 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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Abstract
【選択図】 図2
Description
Claims (21)
- 入力信号を受信するように動作可能なデジタルプリディストータ(DPD)であって、第1の帯域幅により特徴付けられるDPDと、
前記DPDの出力に結合された第2の帯域幅により特徴付けられるフィルタと、
前記フィルタの出力に結合されたデジタルアナログ変換器と、
前記デジタルアナログ変換器の出力に結合された変調器と、
前記変調器の出力に結合された電力増幅器と、
前記電力増幅器の出力に結合された第3の帯域幅により特徴付けられる帯域通過フィルタと、
前記帯域通過フィルタの出力に結合されたダウンコンバータと、
前記ダウンコンバータの出力に結合されたアナログデジタル変換器(ADC)であって、前記第1の帯域幅の値よりも小さいサンプリングレート値により特徴付けられるADCと、
を含む、広帯域通信システム。 - 前記ADCは、前記第1の帯域幅の値の3分の1よりも小さいサンプリングレート値により特徴付けられる、請求項1に記載の広帯域通信システム。
- 前記第3の帯域幅は前記第1の帯域幅よりも小さい、請求項1に記載の広帯域通信システム。
- 前記第3の帯域幅は前記第2の帯域幅とほぼ等しい、請求項3に記載の広帯域通信システム。
- 前記帯域通過フィルタは、低電力狭帯域帯域通過フィルタを備える、請求項1に記載の広帯域通信システム。
- 前記フィルタは、狭帯域デジタルフィルタを備える、請求項1に記載の広帯域通信システム。
- 前記帯域通過フィルタは、無線周波数(RF)フィルタを備える、請求項1に記載の広帯域通信システム。
- 前記帯域通過フィルタは、アナログ低電力狭帯域中間周波数(IF)フィルタを備える、請求項1に記載の広帯域通信システム。
- 入力信号を受信するように動作可能なデジタルプリディストータ(DPD)であって、前記入力信号は20MHzの帯域幅により特徴付けられ、前記DPDは100MHzよりも大きい帯域幅により特徴付けられるDPDと、
前記DPDの出力に結合されたデジタルフィルタであって、30MHzと50MHzの間の帯域幅により特徴付けられるデジタルフィルタと、
前記デジタルフィルタの出力に結合されたデジタルアナログ変換器と、
前記デジタルアナログ変換器の出力に結合された変調器と、
前記変調器の出力に結合された電力増幅器と、
前記電力増幅器の出力に結合され、100MHzよりも小さい帯域幅により特徴付けられる無線周波数(RF)帯域通過フィルタと、
前記RF帯域通過フィルタの出力に結合されたアナログデジタル変換器(ADC)であって、100Msps以下のサンプリングレートにより特徴付けられるADCと、
を備える、通信システム。 - 前記RF帯域通過フィルタの帯域幅は30MHzと50MHzの間である、請求項9に記載の通信システム。
- 前記サンプリングレートは60Mspsと100Mspsの間である、請求項9に記載の通信システム。
- 入力信号を受信するように動作可能なデジタルプリディストータ(DPD)であって、前記入力信号は20MHzの帯域幅により特徴付けられ、前記DPDは100MHzよりも大きい帯域幅により特徴付けられるDPDと、
前記DPDの出力に結合されたデジタルフィルタであって、30MHzと50MHzの間の帯域幅により特徴付けられるデジタルフィルタと、
前記デジタルフィルタの出力に結合されたデジタルアナログ変換器と、
前記デジタルアナログ変換器の出力に結合された変調器と、
前記変調器の出力に結合された電力増幅器と、
前記電力増幅器の出力及び前記ダウンコンバータの出力に結合された中間周波数(IF)帯域通過フィルタであって、100MHzよりも小さい帯域幅により特徴付けられるIF帯域通過フィルタと、
前記IF帯域通過フィルタの出力に結合されたアナログデジタル変換器(ADC)であって、100Msps以下のサンプリングレートにより特徴付けられるADCと、
を備える、通信システム。 - 前記IF帯域通過フィルタの帯域幅は30MHzと50MHzの間である、請求項12に記載の通信システム。
- 前記サンプリングレートは60Mspsと100Mspsの間である、請求項12に記載の通信システム。
- 通信システムを動作させる方法であって、
デジタルプリディストータ(DPD)において信号を受信するステップと、
前記DPDを使用して前記信号にプリディストーションを導入するステップと、
デジタルフィルタを使用して前記プリディストーションを導入された信号をフィルタリングするステップと、
前記フィルタリングされた信号をアナログ信号に変換するステップと、
前記アナログ信号を変調するステップと、
前記変調された信号を増幅するステップと、
前記増幅された信号の一部を結合してフィードバック信号を供給するステップと、
帯域通過フィルタを使用して前記フィードバック信号をフィルタリングするステップと、
前記フィルタリングされたフィードバック信号をダウンコンバートするステップと、
前記ダウンコンバートされた信号をデジタル信号に変換するステップと、
前記デジタル信号を前記DPDに供給するステップと、
を備える、方法。 - 前記プリディストーションを導入された信号をフィルタリングするステップは、前記DPDの帯域幅よりも小さいフィルタ帯域幅にわたり実行される、請求項15に記載の方法。
- 前記フィルタ帯域幅は30MHzと50MHzの間である、請求項16に記載の方法。
- 帯域通過フィルタを使用して前記フィードバック信号をフィルタリングするステップは、前記DPDの帯域幅よりも小さい帯域通過帯域幅にわたり実行される、請求項17に記載の方法。
- 前記帯域通過帯域幅は30MHzと50MHzの間である、請求項16に記載の方法。
- 前記ダウンコンバートされた信号を変換するステップは、前記DPDの帯域幅の2倍よりも小さいサンプリングレートで実行される、請求項15に記載の方法。
- 前記サンプリングレートは60Mspsと100Mspsの間である、請求項20に記載の方法。
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PCT/US2012/056918 WO2013044238A1 (en) | 2011-09-22 | 2012-09-24 | System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems |
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US9197259B2 (en) | 2015-11-24 |
JP6080854B2 (ja) | 2017-02-15 |
KR20140067143A (ko) | 2014-06-03 |
US20200021319A1 (en) | 2020-01-16 |
US20140376661A1 (en) | 2014-12-25 |
US20220231714A1 (en) | 2022-07-21 |
CN103858337B (zh) | 2017-05-03 |
EP2759056A4 (en) | 2015-06-03 |
US20200358466A1 (en) | 2020-11-12 |
EP2759056A1 (en) | 2014-07-30 |
US11245429B2 (en) | 2022-02-08 |
US20160191087A1 (en) | 2016-06-30 |
WO2013044238A1 (en) | 2013-03-28 |
US10749553B2 (en) | 2020-08-18 |
US10256853B2 (en) | 2019-04-09 |
KR102011161B1 (ko) | 2019-08-14 |
CN103858337A (zh) | 2014-06-11 |
US8873674B2 (en) | 2014-10-28 |
US20130077713A1 (en) | 2013-03-28 |
US20230370098A1 (en) | 2023-11-16 |
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