JP4606441B2 - 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 - Google Patents
位相偏移変調受信装置および振幅および位相の不平衡の補正方法 Download PDFInfo
- Publication number
- JP4606441B2 JP4606441B2 JP2007188695A JP2007188695A JP4606441B2 JP 4606441 B2 JP4606441 B2 JP 4606441B2 JP 2007188695 A JP2007188695 A JP 2007188695A JP 2007188695 A JP2007188695 A JP 2007188695A JP 4606441 B2 JP4606441 B2 JP 4606441B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- component
- components
- amplitude
- 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
- 238000000034 method Methods 0.000 title claims description 14
- 230000010363 phase shift Effects 0.000 title description 3
- 238000012937 correction Methods 0.000 claims description 12
- 238000012935 Averaging Methods 0.000 claims 2
- 230000002596 correlated effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 8
- 238000013139 quantization Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- PXFBZOLANLWPMH-UHFFFAOYSA-N 16-Epiaffinine Natural products C1C(C2=CC=CC=C2N2)=C2C(=O)CC2C(=CC)CN(C)C1C2CO PXFBZOLANLWPMH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013642 negative control Substances 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000011144 upstream manufacturing 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
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
Description
fp=fS logL M (式1)
(ここで、fSはシンボル周波数、Mはメッセージ数、Lは変調元数を表す)で表されるので、Lが大きいほどパルス繰返し周波数は小さくなり、周波数帯域幅も小さくなる。
量子化レベル数=2n−1 (式2)
のnが6に等しい場合であり、精細度63レベルをもたらす。所望の信号精細度でnが定まる。
動している 場合は、このシステム17は補正に影響を及ぼさない。下流側の自動利得制御(AGC)(図示してない)は後段の信号処理(図示してない)に備えてシステム出力51Iおよび51Qを等化する。
I=x−ry (式3)
−I=−x−ry (式4)
(ここでrは相互相関に比例)の演算を行い両者から相互相関寄与分を除去する。相互相関を生ずる信号部分を除去すると、加算器69Iおよび69Qの出力71Iおよび71Qは無相関となり信号空間で互いに直交関係になる。
21I,21Q 入力端子
23I,23Q 入来シンボル
25I,25Q 可変利得増幅器
29I,29Q 絶対値算出器
33I,33Q 低域フィルタ
37 加算器
41 ハードリミタ
45 累算器
49I,49Q 利得制御信号入力端子
63I,63Q 入力端子
69I,69Q 加算器
93I,93Q 可変利得増幅器
75 ミキサ
79 積分器
83 ハードリミタ
87 累算器
101 振幅平衡化および位相平衡化組合せシステム
Claims (5)
- デジタル変調された信号のI成分およびQ成分を平衡化する方法において、
補正係数に従って、前記信号のI成分およびQ成分を増幅するステップと、
前記信号の前記I成分および前記信号の前記増幅されたQ成分を加えて、前記信号の位相平衡化されたI成分を生成するステップと、
前記信号の前記Q成分および前記信号の前記増幅されたI成分を加えて、前記信号の位相平衡化されたQ成分を生成するステップと、
前記信号の前記位相平衡化されたI成分およびQ成分を相関化するステップと、
前記相関化した結果から、前記補正係数を生成するステップと
を備えることを特徴とする方法。 - 前記相関化した結果を時間平均するステップであって、前記補正係数は前記時間平均された値から生成されるステップをさらに備えることを特徴とする請求項1に記載の方法。
- 前記信号の前記位相平衡化されたI成分およびQ成分を、ゲイン係数に従って増幅して、前記信号の振幅平衡化されたI成分およびQ成分をそれぞれ生成するステップと、
前記信号の前記振幅平衡化されたI成分およびQ成分を比較することによって、前記ゲイン係数を生成するステップと、
前記信号のI成分およびQ成分を増幅する前記ゲイン係数をフィードバックするステップと
をさらに備えることを特徴とする請求項1に記載の方法。 - 前記増幅されたI成分およびQ成分の絶対値を生成するステップであって、前記ゲイン係数は前記絶対値から生成されるステップをさらに備えることを特徴とする請求項3に記載の方法。
- 前記信号の前記増幅されたI成分およびQ成分の出力を平均化するステップであって、前記ゲイン係数は前記時間平均値から生成されるステップをさらに備えることを特徴とする請求項4に記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/233,791 US6377620B1 (en) | 1999-01-19 | 1999-01-19 | Balancing amplitude and phase |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005316066A Division JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010120543A Division JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007267430A JP2007267430A (ja) | 2007-10-11 |
JP4606441B2 true JP4606441B2 (ja) | 2011-01-05 |
Family
ID=22878712
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000595470A Expired - Fee Related JP4140943B2 (ja) | 1999-01-19 | 1999-12-07 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2005316066A Expired - Fee Related JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2007188695A Expired - Fee Related JP4606441B2 (ja) | 1999-01-19 | 2007-07-19 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
JP2010120543A Expired - Fee Related JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000595470A Expired - Fee Related JP4140943B2 (ja) | 1999-01-19 | 1999-12-07 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP2005316066A Expired - Fee Related JP4343166B2 (ja) | 1999-01-19 | 2005-10-31 | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010120543A Expired - Fee Related JP4802288B2 (ja) | 1999-01-19 | 2010-05-26 | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 |
Country Status (12)
Country | Link |
---|---|
US (3) | US6377620B1 (ja) |
EP (2) | EP1458158B9 (ja) |
JP (4) | JP4140943B2 (ja) |
KR (1) | KR100403751B1 (ja) |
CN (1) | CN1142667C (ja) |
AT (2) | ATE281730T1 (ja) |
AU (1) | AU2588200A (ja) |
CA (3) | CA2351761C (ja) |
DE (2) | DE69921693T2 (ja) |
ES (1) | ES2232204T3 (ja) |
HK (2) | HK1040583B (ja) |
WO (1) | WO2000044143A1 (ja) |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100508508C (zh) * | 1999-01-19 | 2009-07-01 | 交互数字技术公司 | 相移键控接收机中振幅和相位不平衡的校正方法及相应信号平衡器 |
US6377620B1 (en) * | 1999-01-19 | 2002-04-23 | Interdigital Technology Corporation | Balancing amplitude and phase |
US6792054B1 (en) * | 1999-03-30 | 2004-09-14 | Texas Instruments Incorporated | Method for reducing complex frequency down-conversion impairments |
JP3531571B2 (ja) * | 2000-03-15 | 2004-05-31 | 日本電気株式会社 | 振幅偏差補正回路 |
EP1168597A1 (en) * | 2000-06-23 | 2002-01-02 | NTT DoCoMo, Inc. | Quadrature Receiver with Orthogonality Correction |
DE10036889C1 (de) * | 2000-07-28 | 2002-04-18 | Infineon Technologies Ag | Verfahren und Einrichtung zur Bestimmung eines in einem differentiellen Sendesignalabschnitt eines Funkgerätes auftretenden Offsetwerts |
US7050778B1 (en) * | 2000-09-18 | 2006-05-23 | Broadcom Corporation | Direct conversion turner |
US20020127982A1 (en) * | 2001-03-07 | 2002-09-12 | Nokia Mobile Phones Ltd | Mobile station receiver operable for both single and multi-carrier reception |
JP2002271428A (ja) * | 2001-03-08 | 2002-09-20 | Sony Corp | 通信装置および通信方法、並びにプログラムおよび記録媒体 |
KR100414362B1 (ko) * | 2001-05-29 | 2004-01-07 | 엘지전자 주식회사 | 디지털 변조에서의 아이/큐 에러 보상 장치 및 방법 |
US7061994B2 (en) * | 2001-06-21 | 2006-06-13 | Flarion Technologies, Inc. | Methods and apparatus for I/Q imbalance compensation |
ES2323856T3 (es) * | 2001-06-29 | 2009-07-27 | Nokia Corporation | Desequilibrio de la fase iq. |
US7233629B2 (en) * | 2001-06-29 | 2007-06-19 | Nokia Corporation | Adjusting a receiver |
US7158586B2 (en) * | 2002-05-03 | 2007-01-02 | Atheros Communications, Inc. | Systems and methods to provide wideband magnitude and phase imbalance calibration and compensation in quadrature receivers |
US6917241B2 (en) * | 2002-05-13 | 2005-07-12 | Matsushita Electric Industrial Co., Ltd. | Amplifier circuit, transmission device, amplification method, and transmission method |
US20040013204A1 (en) * | 2002-07-16 | 2004-01-22 | Nati Dinur | Method and apparatus to compensate imbalance of demodulator |
WO2004015853A1 (en) * | 2002-08-02 | 2004-02-19 | Nokia Corporation | Quadrature demodulator using a fft-processor |
JP3967226B2 (ja) * | 2002-08-07 | 2007-08-29 | 三星電子株式会社 | 無線機 |
AU2002321365A1 (en) * | 2002-09-05 | 2004-03-29 | Nokia Corporation | Correction of quadrature error |
US7274750B1 (en) * | 2002-09-27 | 2007-09-25 | 3Com Corporation | Gain and phase imbalance compensation for OFDM systems |
DE10245686B3 (de) * | 2002-09-30 | 2004-06-03 | Advanced Micro Devices, Inc., Sunnyvale | Phasenfehlerkorrektor und Verfahren |
TWI226154B (en) * | 2003-01-20 | 2005-01-01 | Mediatek Inc | Method and related apparatus for erasing image cross talk in a low-IF receiver |
US6950480B2 (en) * | 2003-01-24 | 2005-09-27 | Texas Instruments Incorporated | Receiver having automatic burst mode I/Q gain and phase balance |
CN100420157C (zh) * | 2003-02-19 | 2008-09-17 | 联发科技股份有限公司 | 用于低中频接收机中消除镜像干扰的方法及相关装置 |
US7412222B2 (en) * | 2003-05-20 | 2008-08-12 | Broadcom Corporation | Quadrature correction method for analog television reception using direct-conversion tuners |
GB2406984B (en) * | 2003-06-18 | 2005-12-21 | Motorola Inc | Method and arrangement for I-Q balancing and radio receiver incorporating same |
DE10332584B3 (de) * | 2003-07-17 | 2005-04-28 | Infineon Technologies Ag | Kompensation der IQ-Phasenunsymmetrie bei Quadraturmodulations- und -demodulations-Verfahren |
US7298793B2 (en) * | 2003-08-21 | 2007-11-20 | Mediatek Inc. | Method and apparatus for I/Q mismatch calibration of transmitter |
US7280619B2 (en) * | 2003-12-23 | 2007-10-09 | Intel Corporation | Method and apparatus for compensating I/Q imbalance in receivers |
JP2005197968A (ja) * | 2004-01-06 | 2005-07-21 | Fujitsu Ltd | 信号処理回路並びに直交復調装置およびその誤差推定方法 |
US7333423B2 (en) * | 2004-03-31 | 2008-02-19 | Intel Corporation | Transceiver with calibrated I and Q paths and methods for deconvolved calibration |
US7349677B2 (en) * | 2004-04-08 | 2008-03-25 | Broadcom Corporation | Hardware efficient RF transceiver I/Q imbalance compensation based upon taylor approximation |
GB2419483B (en) * | 2004-09-17 | 2008-12-24 | Motorola Inc | Demodulator for use in wireless communucations and receiver, method and terminal using it |
US7570710B1 (en) * | 2004-12-15 | 2009-08-04 | Rf Magic, Inc. | In-phase and quadrature-phase signal amplitude and phase calibration |
JP4466861B2 (ja) * | 2005-06-27 | 2010-05-26 | 横河電機株式会社 | Qpsk光変調装置 |
FR2888429A1 (fr) * | 2005-07-06 | 2007-01-12 | St Microelectronics Sa | Correction des defauts d'appariement entre deux voies i et q |
CN101390360A (zh) * | 2006-02-22 | 2009-03-18 | Nxp股份有限公司 | 同相和正交路径失衡补偿 |
US7653124B2 (en) * | 2006-10-03 | 2010-01-26 | Fujitsu Limited | Monitoring differential phase-shifted keying demodulation |
CN101388729B (zh) * | 2007-09-14 | 2012-05-09 | 富士通株式会社 | 相位失衡监测装置、振幅失衡监测装置及使用它们的装置 |
JP5102738B2 (ja) * | 2008-10-27 | 2012-12-19 | シャープ株式会社 | Iqミスマッチ補正回路 |
US8050350B2 (en) * | 2008-12-30 | 2011-11-01 | Nxp. B.V. | Receiver I-Q balance calibration |
US8270849B2 (en) * | 2009-03-31 | 2012-09-18 | Alcatel Lucent | Phase error correction in a coherent receiver |
US8416895B2 (en) * | 2009-06-24 | 2013-04-09 | Broadcom Corporation | Apparatus and method for IQ imbalance calibration in a receiver |
CN102118174A (zh) * | 2009-12-30 | 2011-07-06 | 上海华虹集成电路有限责任公司 | Cmmb接收机中i/q不平衡补偿装置及方法 |
CN102484633B (zh) * | 2010-03-29 | 2014-11-26 | 旭化成微电子株式会社 | 相位调整电路、相位调整方法 |
JP5361927B2 (ja) * | 2011-03-14 | 2013-12-04 | 株式会社東芝 | 無線受信装置 |
WO2012153373A1 (ja) * | 2011-05-10 | 2012-11-15 | パナソニック株式会社 | 振幅・直交度誤差補償装置 |
US8670738B2 (en) * | 2011-09-19 | 2014-03-11 | Mediatek Inc. | Imbalance compensator for correcting mismatch between in-phase branch and quadrature branch, and related imbalance compensation method and direct conversion receiving apparatus thereof |
JP5591853B2 (ja) | 2012-03-19 | 2014-09-17 | 株式会社東芝 | 直交誤差補償回路 |
JP2015154154A (ja) * | 2014-02-12 | 2015-08-24 | 国立大学法人東京工業大学 | 相補Golay符号を用いた直交変復調方法及び装置 |
CN108169715B (zh) * | 2017-11-23 | 2021-12-10 | 北京遥感设备研究所 | 一种同相和正交通道相位不平衡度确定方法及系统 |
US11374803B2 (en) * | 2020-10-16 | 2022-06-28 | Analog Devices, Inc. | Quadrature error correction for radio transceivers |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0568056A1 (en) * | 1992-05-01 | 1993-11-03 | Grumman Aerospace Corporation | Arrangement for correction of synchronous demodulator quadrature phase errors |
JPH08307465A (ja) * | 1995-04-28 | 1996-11-22 | Mitsubishi Electric Corp | 受信装置の補償方法・受信装置及び送受信装置 |
JPH09186729A (ja) * | 1996-01-08 | 1997-07-15 | Hitachi Denshi Ltd | 直交変調器および直交復調器の振幅誤差制御方法 |
JPH1093478A (ja) * | 1996-09-12 | 1998-04-10 | Uniden Corp | スペクトラム拡散信号受信装置 |
WO1998032221A1 (en) * | 1997-01-17 | 1998-07-23 | Ericsson Inc. | Method and apparatus for compensating for imbalances between quadrature signals |
JPH10341267A (ja) * | 1997-06-06 | 1998-12-22 | Nec Corp | Agc回路 |
JP2006067625A (ja) * | 1999-01-19 | 2006-03-09 | Interdigital Technol Corp | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP4085378B2 (ja) * | 2003-03-28 | 2008-05-14 | 東洋建設株式会社 | 底泥覆土工法 |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5220753A (en) | 1975-06-11 | 1977-02-16 | Motorola Inc | Quadrature phase shift keying demodulator |
US4729110A (en) * | 1984-12-24 | 1988-03-01 | General Electric Company | Correction of offset and gain errors in RF receivers |
US4736390A (en) * | 1986-10-15 | 1988-04-05 | Itt Avionics, A Division Of Itt Corporation | Zero IF radio receiver apparatus |
DE3784717T2 (de) * | 1987-09-03 | 1993-08-26 | Philips Nv | Phasen- und verstaerkungsregelung fuer einen empfaenger mit zwei zweigen. |
JPH01317010A (ja) | 1988-06-16 | 1989-12-21 | Fujitsu Ltd | 自動利得制御回路 |
US5134634A (en) * | 1989-08-31 | 1992-07-28 | Nec Corporation | Multilevel quadrature amplitude demodulator capable of compensating for a quadrature phase deviation of a carrier signal pair |
JPH0485378A (ja) * | 1990-07-27 | 1992-03-18 | Toshiba Chem Corp | ポリエステルイミドウレタン塗料 |
US5263196A (en) | 1990-11-19 | 1993-11-16 | Motorola, Inc. | Method and apparatus for compensation of imbalance in zero-if downconverters |
US5105195A (en) * | 1990-12-10 | 1992-04-14 | Hughes Aircraft Company | System and method for compensation of in-phase and quadrature phase and gain imbalance |
US5249203A (en) * | 1991-02-25 | 1993-09-28 | Rockwell International Corporation | Phase and gain error control system for use in an i/q direct conversion receiver |
JPH04275746A (ja) | 1991-03-01 | 1992-10-01 | Toshiba Corp | 直交変調器 |
FR2689712B1 (fr) * | 1992-04-03 | 1994-08-19 | Alcatel Telspace | Dispositif de démodulation de signaux numériques modulés selon une technique à constellations de modulation alternées. |
JPH0678006A (ja) | 1992-08-27 | 1994-03-18 | Sanyo Electric Co Ltd | 直交変調回路 |
JP2636132B2 (ja) * | 1993-03-09 | 1997-07-30 | 日鉱金属株式会社 | 鉄製品の着色処理方法 |
US5351016A (en) * | 1993-05-28 | 1994-09-27 | Ericsson Ge Mobile Communications Inc. | Adaptively self-correcting modulation system and method |
US5369411A (en) * | 1993-06-01 | 1994-11-29 | Westinghouse Electric Corporation | Imbalance correction of in-phase and quadrature phase return signals |
JP3552254B2 (ja) | 1993-10-25 | 2004-08-11 | ソニー株式会社 | 4相位相変調回路 |
US5604929A (en) * | 1995-04-21 | 1997-02-18 | Rockwell International | System for correcting quadrature gain and phase errors in a direct conversion single sideband receiver independent of the character of the modulated signal |
KR0166877B1 (ko) * | 1995-08-28 | 1999-02-01 | 구자홍 | 큐피에스케이 위상복조장치 |
US5721756A (en) * | 1996-03-26 | 1998-02-24 | Sicom, Inc. | Digital receiver with tunable analog parameters and method therefor |
US5949821A (en) * | 1996-08-05 | 1999-09-07 | Motorola, Inc. | Method and apparatus for correcting phase and gain imbalance between in-phase (I) and quadrature (Q) components of a received signal based on a determination of peak amplitudes |
CN1101091C (zh) * | 1996-09-06 | 2003-02-05 | 皇家菲利浦电子有限公司 | 零中频接收机 |
US5705949A (en) * | 1996-09-13 | 1998-01-06 | U.S. Robotics Access Corp. | Compensation method for I/Q channel imbalance errors |
CN1069007C (zh) | 1997-04-11 | 2001-07-25 | 庄睛光 | 宽频带低噪音低互调失真接收机 |
US6044112A (en) * | 1997-07-03 | 2000-03-28 | Hitachi America, Ltd. | Methods and apparatus for correcting amplitude and phase imbalances in demodulators |
JPH1198212A (ja) | 1997-09-19 | 1999-04-09 | Yokogawa Electric Corp | 直交変調器 |
US6330290B1 (en) * | 1998-09-25 | 2001-12-11 | Lucent Technologies, Inc. | Digital I/Q imbalance compensation |
US6118322A (en) * | 1998-11-03 | 2000-09-12 | Motorola, Inc. | Method and apparatus for reducing even order distortion in differential circuits |
CN100508508C (zh) * | 1999-01-19 | 2009-07-01 | 交互数字技术公司 | 相移键控接收机中振幅和相位不平衡的校正方法及相应信号平衡器 |
US6222878B1 (en) * | 1999-09-27 | 2001-04-24 | Sicom, Inc. | Communication system with end-to-end quadrature balance control |
PL2082167T3 (pl) | 2006-10-16 | 2017-08-31 | Philips Lighting Holding B.V. | Urządzenie oświetlające diodą emitującą światło |
-
1999
- 1999-01-19 US US09/233,791 patent/US6377620B1/en not_active Expired - Lifetime
- 1999-12-07 AU AU25882/00A patent/AU2588200A/en not_active Abandoned
- 1999-12-07 CA CA002351761A patent/CA2351761C/en not_active Expired - Fee Related
- 1999-12-07 CN CNB99814861XA patent/CN1142667C/zh not_active Expired - Fee Related
- 1999-12-07 CA CA2671999A patent/CA2671999C/en not_active Expired - Fee Related
- 1999-12-07 EP EP04013363A patent/EP1458158B9/en not_active Expired - Lifetime
- 1999-12-07 KR KR10-2001-7008514A patent/KR100403751B1/ko not_active IP Right Cessation
- 1999-12-07 AT AT99968466T patent/ATE281730T1/de not_active IP Right Cessation
- 1999-12-07 ES ES99968466T patent/ES2232204T3/es not_active Expired - Lifetime
- 1999-12-07 DE DE69921693T patent/DE69921693T2/de not_active Expired - Lifetime
- 1999-12-07 DE DE69943301T patent/DE69943301D1/de not_active Expired - Lifetime
- 1999-12-07 WO PCT/US1999/029002 patent/WO2000044143A1/en active IP Right Grant
- 1999-12-07 JP JP2000595470A patent/JP4140943B2/ja not_active Expired - Fee Related
- 1999-12-07 EP EP99968466A patent/EP1145517B1/en not_active Expired - Lifetime
- 1999-12-07 AT AT04013363T patent/ATE503330T1/de not_active IP Right Cessation
- 1999-12-07 CA CA002505751A patent/CA2505751C/en not_active Expired - Fee Related
-
2002
- 2002-03-05 HK HK02101693.6A patent/HK1040583B/zh not_active IP Right Cessation
- 2002-04-15 US US10/122,992 patent/US6895045B2/en not_active Expired - Fee Related
-
2004
- 2004-11-10 HK HK04108831.2A patent/HK1066121A1/xx not_active IP Right Cessation
-
2005
- 2005-10-31 JP JP2005316066A patent/JP4343166B2/ja not_active Expired - Fee Related
-
2007
- 2007-07-19 JP JP2007188695A patent/JP4606441B2/ja not_active Expired - Fee Related
-
2009
- 2009-01-12 US US12/352,303 patent/US8792545B2/en not_active Expired - Fee Related
-
2010
- 2010-05-26 JP JP2010120543A patent/JP4802288B2/ja not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0568056A1 (en) * | 1992-05-01 | 1993-11-03 | Grumman Aerospace Corporation | Arrangement for correction of synchronous demodulator quadrature phase errors |
JPH08307465A (ja) * | 1995-04-28 | 1996-11-22 | Mitsubishi Electric Corp | 受信装置の補償方法・受信装置及び送受信装置 |
JPH09186729A (ja) * | 1996-01-08 | 1997-07-15 | Hitachi Denshi Ltd | 直交変調器および直交復調器の振幅誤差制御方法 |
JPH1093478A (ja) * | 1996-09-12 | 1998-04-10 | Uniden Corp | スペクトラム拡散信号受信装置 |
WO1998032221A1 (en) * | 1997-01-17 | 1998-07-23 | Ericsson Inc. | Method and apparatus for compensating for imbalances between quadrature signals |
JPH10341267A (ja) * | 1997-06-06 | 1998-12-22 | Nec Corp | Agc回路 |
JP2006067625A (ja) * | 1999-01-19 | 2006-03-09 | Interdigital Technol Corp | 位相偏移変調受信装置における振幅および位相の不平衡の補正 |
JP4085378B2 (ja) * | 2003-03-28 | 2008-05-14 | 東洋建設株式会社 | 底泥覆土工法 |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4606441B2 (ja) | 位相偏移変調受信装置および振幅および位相の不平衡の補正方法 | |
CN102355720B (zh) | 无线发送装置及无线发送方法 | |
US7061994B2 (en) | Methods and apparatus for I/Q imbalance compensation | |
US7477687B2 (en) | Balancing amplitude and phase | |
JP4241765B2 (ja) | 送信機及びキャリアリーク検出方法 | |
JP3316744B2 (ja) | Afc回路、それを備えた受信機、及び自動周波数制御通信システム | |
JPH11331300A (ja) | 復調装置 | |
US5517535A (en) | Numerically controlled oscillator with complex exponential outputs using recursion technique | |
US6678337B1 (en) | Method and device for demodulating receive signal including a pilot signal | |
US5640125A (en) | Digital PSK-type demodulator having clock recovery before carrier recovery | |
EP0851640B1 (en) | Correction of DC and phase offsets in PSK receivers | |
US8514977B2 (en) | Transmission apparatus, reception apparatus, transmission method, and reception method of wireless communication system | |
MXPA01006193A (en) | Correction of amplitude and phase imbalance in psk receivers | |
US20030112061A1 (en) | Method for demodulating signal | |
WO2002073920A1 (en) | Distortion pre-corrector for communication apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070817 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A132 Effective date: 20100126 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20100426 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20100430 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100526 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20100907 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20101005 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131015 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |