JP6415825B2 - Iq変調器内のdcオフセットを決定する方法及び装置 - Google Patents
Iq変調器内のdcオフセットを決定する方法及び装置 Download PDFInfo
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- JP6415825B2 JP6415825B2 JP2014033356A JP2014033356A JP6415825B2 JP 6415825 B2 JP6415825 B2 JP 6415825B2 JP 2014033356 A JP2014033356 A JP 2014033356A JP 2014033356 A JP2014033356 A JP 2014033356A JP 6415825 B2 JP6415825 B2 JP 6415825B2
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- Prior art keywords
- modulator
- offset
- input
- determining
- polynomial function
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/104—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof of other parameters, e.g. DC offset, delay or propagation times
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
- H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
-
- 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
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
- H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
-
- 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
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
610…IQ変調器
652…電圧オフセット測定器
658…プロセッサ
659…メモリ
Claims (6)
- IQ変調器の第1入力用に第1及び第2電圧を選択する処理と、
上記第1及び第2電圧の各々に対して、上記IQ変調器の第2入力へ複数の入力信号を供給し、上記IQ変調器の出力から測定された搬送波パワーの組を各々生成する処理と、
上記IQ変調器の上記第1入力の上記第1電圧に関連する上記測定された搬送波パワーの組から第1の2次多項式関数を生成する処理と、
上記IQ変調器の上記第1入力の上記第2電圧に関連する上記測定された搬送波パワーの組から第2の2次多項式関数を生成する処理と、
上記第1及び第2の2次多項式関数のパワー・レベルを比較して、上記第1及び第2の2次多項式関数の互いの関係を決定する処理と、
上記第1及び第2の2次多項式関数の上記決定した関係からDCオフセットを決定する処理と
を備えたIQ変調器内のDCオフセットを決定する方法。 - 上記第1及び第2の2次多項式関数の最小値から上記パワー・レベルを決定することを更に備えた請求項1に記載のIQ変調器内のDCオフセットを決定する方法。
- 上記決定された関係が、上記第1及び第2の2次多項式関数の上記最小値から決定された上記パワー・レベルの比である請求項2に記載のIQ変調器内のDCオフセットを決定する方法。
- 第1と第2電圧を受けるIQ変調器の第1入力と、
上記第1及び第2電圧の各々に関して、複数の入力信号が供給される上記IQ変調器の第2入力と、
複数の上記入力信号に対して、上記IQ変調器の出力から測定された搬送波パワーの組を各々生成するように構成された検出器と、
上記測定された搬送波パワーから複数の多項式関数を生成するように構成された関数発生器と、
生成された複数の上記多項式関数のパワー・レベルを互いに比較して、上記測定された搬送波パワーの組の間の関係を生成する比較器と、
上記決定された関係からDCオフセットを決定するように構成されたオフセット計算器と
を備えたIQ変調器内のDCオフセットを決定する装置。 - 上記多項式関数の最小値から上記パワー・レベルを決定するように構成されたパワー検出器を更に備える請求項4に記載のIQ変調器内のDCオフセットを決定する装置。
- 上記多項式関数の上記最小値から決定される上記パワー・レベルの比を決定するようにパワー検出器が構成された請求項5に記載のIQ変調器内のDCオフセットを決定する装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/774,565 US9025648B2 (en) | 2013-02-22 | 2013-02-22 | Measurement of DC offsets in IQ modulators |
US13/774,565 | 2013-02-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014165922A JP2014165922A (ja) | 2014-09-08 |
JP6415825B2 true JP6415825B2 (ja) | 2018-10-31 |
Family
ID=50156607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014033356A Expired - Fee Related JP6415825B2 (ja) | 2013-02-22 | 2014-02-24 | Iq変調器内のdcオフセットを決定する方法及び装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9025648B2 (ja) |
EP (1) | EP2770632B1 (ja) |
JP (1) | JP6415825B2 (ja) |
KR (1) | KR20140105409A (ja) |
CN (1) | CN104022834B (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9742600B2 (en) | 2015-02-05 | 2017-08-22 | Samsung Electronics Co., Ltd. | Method and system for estimating and compensating for direct current (DC) offset in ultra-low power (ULP) receiver |
US10470070B1 (en) * | 2018-06-20 | 2019-11-05 | Viavi Solutions Inc. | Radio frequency (RF) power measurements in common public radio interface (CPRI) spectrum analysis |
CN112737610B (zh) * | 2020-12-29 | 2023-07-07 | 芯翼信息科技(上海)有限公司 | 直流偏移的估计和校准方法及装置 |
US11683026B1 (en) | 2022-08-30 | 2023-06-20 | International Business Machines Corporation | Calibrating signal currents in a radio frequency signal generator |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2785111B1 (fr) * | 1998-10-23 | 2004-08-20 | St Microelectronics Sa | Procede et systeme de reglage du niveau des raies parasites du spectre frequentiel de sortie d'un dispositif de transposition de frequence a bande laterale unique, en particulier incorpore dans un telephone mobile |
US6298096B1 (en) * | 1998-11-19 | 2001-10-02 | Titan Corporation | Method and apparatus for determination of predistortion parameters for a quadrature modulator |
US6421398B1 (en) * | 2000-01-28 | 2002-07-16 | Alcatel Canada Inc. | Modulation system having on-line IQ calibration |
US6801581B1 (en) | 2000-09-13 | 2004-10-05 | Intel Corporation | DC offset cancellation |
US7003263B2 (en) | 2003-05-12 | 2006-02-21 | Lucent Technologies Inc. | Telecommunications receiver and a transmitter |
US7369813B2 (en) * | 2003-05-14 | 2008-05-06 | Telefonaktiebolaget L M Ericsson (Publ) | Fast calibration of electronic components |
US7376200B2 (en) * | 2003-06-06 | 2008-05-20 | Interdigital Technology Corporation | Method and apparatus for suppressing carrier leakage |
US7280619B2 (en) * | 2003-12-23 | 2007-10-09 | Intel Corporation | Method and apparatus for compensating I/Q imbalance in receivers |
WO2006064435A1 (en) * | 2004-12-16 | 2006-06-22 | Philips Intellectual Property & Standards Gmbh | Calibrating amplitude and phase imbalance and dc offset of an analog i /q modulator in a high-frequency transmitter |
CN101129039A (zh) | 2005-02-24 | 2008-02-20 | 艾利森电话股份有限公司 | Iq调制器预失真 |
CN101518014A (zh) * | 2006-09-20 | 2009-08-26 | Nxp股份有限公司 | 发射机的模拟i/q调制器的i/q不均衡和dc偏移校准 |
EP2067335B1 (en) * | 2006-09-20 | 2013-01-09 | Nxp B.V. | Method and system for calibrating an analogue I/Q-modulator of a transmitter |
US8224269B2 (en) * | 2006-10-16 | 2012-07-17 | Agilent Technologies, Inc. | Vector modulator calibration system |
US8010064B2 (en) | 2008-03-13 | 2011-08-30 | Samsung Electro—Mechanics Company, Ltd. | Systems and methods for transmitter calibration |
JP2012085100A (ja) * | 2010-10-12 | 2012-04-26 | Nec Casio Mobile Communications Ltd | 無線通信装置およびキャリアリーク低減方法 |
US20130128931A1 (en) * | 2011-11-17 | 2013-05-23 | Aviacomm Inc. | On-chip radio calibration |
-
2013
- 2013-02-22 US US13/774,565 patent/US9025648B2/en active Active
-
2014
- 2014-02-21 KR KR20140020445A patent/KR20140105409A/ko unknown
- 2014-02-21 CN CN201410059681.9A patent/CN104022834B/zh not_active Expired - Fee Related
- 2014-02-21 EP EP14156198.5A patent/EP2770632B1/en not_active Not-in-force
- 2014-02-24 JP JP2014033356A patent/JP6415825B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN104022834B (zh) | 2018-06-01 |
EP2770632A1 (en) | 2014-08-27 |
EP2770632B1 (en) | 2015-09-09 |
JP2014165922A (ja) | 2014-09-08 |
US9025648B2 (en) | 2015-05-05 |
US20140241407A1 (en) | 2014-08-28 |
KR20140105409A (ko) | 2014-09-01 |
CN104022834A (zh) | 2014-09-03 |
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