JP3826147B2 - デジタル直角変調器 - Google Patents
デジタル直角変調器 Download PDFInfo
- Publication number
- JP3826147B2 JP3826147B2 JP2004233425A JP2004233425A JP3826147B2 JP 3826147 B2 JP3826147 B2 JP 3826147B2 JP 2004233425 A JP2004233425 A JP 2004233425A JP 2004233425 A JP2004233425 A JP 2004233425A JP 3826147 B2 JP3826147 B2 JP 3826147B2
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- JP
- Japan
- Prior art keywords
- amplitude
- modulator
- quadrature
- direction angle
- output 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.)
- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 15
- 238000012937 correction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Images
Classifications
-
- 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
- H04L27/3863—Compensation for quadrature error in the received signal
-
- 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
- H04L27/0014—Carrier regulation
- H04L2027/0016—Stabilisation of local oscillators
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
A.直角変調器のI及び/又はQチャンネルに現われるオフセット電圧。この電圧は、搬送波を出力信号へと漏洩させる。
B.増幅度の差、ひいては、信号レベルの差がI及びQチャンネルに現われて、出力信号の振幅値によりI/Q平面に発生されるコンステレーションに歪を生じさせる。この歪は受信の妨げとなる。
C.所望の90°位相シフトからのずれがI及びQチャンネル間に現われて、受信においてI及びQチャンネル間にクロストークを生じさせ、ひいては、受信を妨げる。
D.変調器(又は全送信器)の出力電力が変化する。
dUI=(A0−A4)*K1
dUQ=(A2−A6)*K1
但し、dUI=I信号オフセットである。
dUQ=Q信号オフセットである。
An=半軸(正又は負の半分)数nに近いコンステレーション点に対して測定さ
れた出力振幅の平均である。軸は、正のI軸から45°の間隔で反時計方
向に番号付けされる(n=0、…7)。
Km=装置の実現に基づく倍率係数である。
AI−AQ=(A0+A4−A2−A6)*K2
但し、AI−AQ=I信号とQ信号との間の振幅差である(変調器ミクサ等の応答も考慮
するのが効果的である)。
この場合も、この式では他の不完全さの影響が著しく打ち消される。
Adis=(A1+A5−A3−A7)/4
dθ=2*(arccos((Adis/Anom+1)/√2)−45°)
但し、Adis=平均振幅歪である。
Anom=公称振幅である。
Aerr=(A0+A1+A2+A3+A4+A5+A6+A7)/8−Anom
但し、Aerr=所望値からの出力振幅歪である。
dUI=(Ah+Aa−Ad−Ae)/2*K1
dUQ=(Ab−Ac−Af−Ag)2*K1
AI−AQ=(Ah+Aa−Ad−Ae−Ab−Ac+Af+Ag)/2*K2
Adis=(Aa+Ab−Ae−Af−Ac−Ad+Ag+Ah)/8
dθ=2*(arccos((Adis/Anom+1)/√2)−45°)
Aerr=(Aa+Ab+Ac+Ad+Ae+Af+Ag+Ah)/8−Anom
dθ=2*(arccos((Adis/Anom+1)/√2)−45°)
は、次の近似式と置き換えることができる。
dθ=Adis*K3
12 振幅検出器
13 歪計算器
14 フィードバック回路
15 基本帯域プロセッサ
16 局部発振器
21 直角ミクサ
22 振幅及び位相計算器
23 歪計算器
24 フィードバック回路
25 基本帯域プロセッサ
26 局部発振器
Claims (1)
- 直角位相のI成分とQ成分とを含む出力信号を発生するように直角位相I入力信号とQ入力信号とを変調する手段と、変調器の出力信号から、変調器の記号クロックに基づくレートで、瞬時振幅サンプルを取り出す手段(12)とを備えたデジタル直角変調器において、
同じ公称振幅を有する振幅サンプルを計算用に選択する手段(13もしくは23)と、
特定の時間に変調しようとする記号の方向角度を特定の方向角度セクターに分類する手段(13)と、
特定の時間に送信しようとする記号に対応する方向角度セクターに前記の選択された振幅サンプルをリンクする手段(13)と、
特定の方向角度セクターに属するサンプルの振幅を他方の方向角度セクターもしくは理想的な値と比較して、変調器の出力信号から、局部発振器の搬送波漏れ、IチャンネルとQチャンネルとの間の振幅不平衡、IチャンネルとQチャンネルとの間の直角エラー、そして振幅エラーを含む動作歪みを決定する手段(13)と、
決定されたすべての動作歪を繰り返し同時に修正するフィードバックループを形成することにより、動作歪みに応答して変調器の調整パラメータを修正する手段(14)と、
を備えたことを特徴とするデジタル直角変調器。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI964793A FI117494B (fi) | 1996-11-29 | 1996-11-29 | Menetelmä digitaalisessa kvadratuurimodulaattorissa ja kvadratuuridemodulaattorissa, digitaalinen kvadratuurimodulaattori ja kvadratuuridemodulaattori |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52433698A Division JP3611862B2 (ja) | 1996-11-29 | 1997-11-28 | デジタル直角変調及び復調方法、並びにデジタル直角変調器及び復調器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004343806A JP2004343806A (ja) | 2004-12-02 |
JP3826147B2 true JP3826147B2 (ja) | 2006-09-27 |
Family
ID=8547175
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52433698A Expired - Fee Related JP3611862B2 (ja) | 1996-11-29 | 1997-11-28 | デジタル直角変調及び復調方法、並びにデジタル直角変調器及び復調器 |
JP2004233425A Expired - Fee Related JP3826147B2 (ja) | 1996-11-29 | 2004-08-10 | デジタル直角変調器 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52433698A Expired - Fee Related JP3611862B2 (ja) | 1996-11-29 | 1997-11-28 | デジタル直角変調及び復調方法、並びにデジタル直角変調器及び復調器 |
Country Status (8)
Country | Link |
---|---|
US (2) | US6570933B1 (ja) |
EP (1) | EP0941593B1 (ja) |
JP (2) | JP3611862B2 (ja) |
CN (1) | CN1172500C (ja) |
AU (1) | AU5056398A (ja) |
DE (1) | DE69736188T2 (ja) |
FI (1) | FI117494B (ja) |
WO (1) | WO1998024209A1 (ja) |
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FI117494B (fi) * | 1996-11-29 | 2006-10-31 | Nokia Corp | Menetelmä digitaalisessa kvadratuurimodulaattorissa ja kvadratuuridemodulaattorissa, digitaalinen kvadratuurimodulaattori ja kvadratuuridemodulaattori |
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FI107212B (fi) | 1999-03-26 | 2001-06-15 | Nokia Networks Oy | I/Q-modulaattorin tasajännitesiirtymän korjaus |
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FR2844412B1 (fr) * | 2002-09-05 | 2004-12-03 | Thomson Licensing Sa | Procede et dispositif de modulation d'une porteuse avec compensation d'erreur d'amplitude et de phase |
CN1296012C (zh) * | 2002-10-01 | 2007-01-24 | 深圳迈瑞生物医疗电子股份有限公司 | 全数字超声频谱多普勒成像方法及装置 |
JP4344357B2 (ja) * | 2003-03-24 | 2009-10-14 | 株式会社アドバンテスト | 直交変調装置、方法、プログラム、記録媒体および変調装置 |
DE10348846B4 (de) * | 2003-10-21 | 2010-07-08 | Infineon Technologies Ag | Verfahren zur Schätzung eines Frequenzversatzes eines modulierten Bandpass-Signals |
JP4341418B2 (ja) * | 2004-01-30 | 2009-10-07 | 日本電気株式会社 | 直交変調器の調整装置及び調整方法並びに通信装置とプログラム |
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JP4376689B2 (ja) * | 2004-04-21 | 2009-12-02 | 富士通株式会社 | 直交変調システム |
US7181205B1 (en) | 2004-05-11 | 2007-02-20 | Rf Micro Devices, Inc. | I/Q calibration |
DE102004029932A1 (de) * | 2004-06-21 | 2006-01-05 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren und Vorrichtung zur gleichzeitigen Kompensation von Signalfehlern in IQ-Modulatoren |
US7197087B2 (en) * | 2004-07-09 | 2007-03-27 | Powerwave Technologies, Inc. | System and method for differential IQ delay compensation in a communications system utilizing adaptive AQM compensation |
US7327803B2 (en) | 2004-10-22 | 2008-02-05 | Parkervision, Inc. | Systems and methods for vector power amplification |
US7355470B2 (en) | 2006-04-24 | 2008-04-08 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning |
JP4595509B2 (ja) * | 2004-11-26 | 2010-12-08 | ソニー株式会社 | 無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
US7564893B2 (en) * | 2005-03-22 | 2009-07-21 | Agilent Technologies, Inc. | Test system and method for parallel modulation error measurement of transceivers |
JP5028002B2 (ja) * | 2005-09-29 | 2012-09-19 | 富士フイルム株式会社 | 電子内視鏡システム |
US8013675B2 (en) | 2007-06-19 | 2011-09-06 | Parkervision, Inc. | Combiner-less multiple input single output (MISO) amplification with blended control |
US7911272B2 (en) | 2007-06-19 | 2011-03-22 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments |
US9106316B2 (en) | 2005-10-24 | 2015-08-11 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification |
CN101310498B (zh) * | 2006-02-03 | 2012-01-11 | 安立股份有限公司 | 相位控制器设备、以及使用相位控制器设备的脉冲模式生成器和误差检测器 |
CN101043269B (zh) * | 2006-03-22 | 2011-01-05 | 富士通株式会社 | I-q正交调制发射机及其i-q路间相位偏置的监测装置和方法 |
US8031804B2 (en) | 2006-04-24 | 2011-10-04 | Parkervision, Inc. | Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
US7937106B2 (en) | 2006-04-24 | 2011-05-03 | ParkerVision, Inc, | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
US7801245B2 (en) * | 2006-12-28 | 2010-09-21 | Alcatel-Lucent Usa Inc. | Increased reliability of data captures for signal predistortion |
US7809080B2 (en) * | 2006-12-28 | 2010-10-05 | Alcatel-Lucent Usa Inc. | Strategically selecting data captures for signal predistortion |
WO2008144017A1 (en) | 2007-05-18 | 2008-11-27 | Parkervision, Inc. | Systems and methods of rf power transmission, modulation, and amplification |
JP5161877B2 (ja) * | 2007-06-11 | 2013-03-13 | 株式会社アドバンテスト | 測定装置およびプログラム |
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CN101246507B (zh) * | 2007-12-29 | 2010-09-29 | 湖南大学 | 一种∑δ调制器开关电流集成电路的参数设计优化方法 |
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CN101912277B (zh) * | 2010-08-06 | 2013-03-27 | 深圳市蓝韵实业有限公司 | 一种基于流水线设计的实时数字正交解调的方法与装置 |
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KR20160058855A (ko) | 2013-09-17 | 2016-05-25 | 파커비전, 인크. | 정보를 포함하는 시간의 함수를 렌더링하기 위한 방법, 장치 및 시스템 |
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-
1996
- 1996-11-29 FI FI964793A patent/FI117494B/fi active IP Right Grant
-
1997
- 1997-11-28 CN CNB971801797A patent/CN1172500C/zh not_active Expired - Fee Related
- 1997-11-28 WO PCT/FI1997/000738 patent/WO1998024209A1/en active IP Right Grant
- 1997-11-28 AU AU50563/98A patent/AU5056398A/en not_active Abandoned
- 1997-11-28 JP JP52433698A patent/JP3611862B2/ja not_active Expired - Fee Related
- 1997-11-28 US US09/308,709 patent/US6570933B1/en not_active Expired - Lifetime
- 1997-11-28 EP EP97913230A patent/EP0941593B1/en not_active Expired - Lifetime
- 1997-11-28 DE DE69736188T patent/DE69736188T2/de not_active Expired - Lifetime
-
2003
- 2003-01-10 US US10/339,554 patent/US6714601B2/en not_active Expired - Lifetime
-
2004
- 2004-08-10 JP JP2004233425A patent/JP3826147B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1998024209A1 (en) | 1998-06-04 |
DE69736188D1 (de) | 2006-08-03 |
EP0941593A1 (en) | 1999-09-15 |
AU5056398A (en) | 1998-06-22 |
DE69736188T2 (de) | 2006-11-09 |
US20030118121A1 (en) | 2003-06-26 |
FI117494B (fi) | 2006-10-31 |
JP2004343806A (ja) | 2004-12-02 |
CN1172500C (zh) | 2004-10-20 |
US6570933B1 (en) | 2003-05-27 |
US6714601B2 (en) | 2004-03-30 |
FI964793A0 (fi) | 1996-11-29 |
EP0941593B1 (en) | 2006-06-21 |
JP3611862B2 (ja) | 2005-01-19 |
JP2001505016A (ja) | 2001-04-10 |
CN1238878A (zh) | 1999-12-15 |
FI964793A (fi) | 1998-05-30 |
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