CN1280433A - 幅值计算电路 - Google Patents
幅值计算电路 Download PDFInfo
- Publication number
- CN1280433A CN1280433A CN00109774.1A CN00109774A CN1280433A CN 1280433 A CN1280433 A CN 1280433A CN 00109774 A CN00109774 A CN 00109774A CN 1280433 A CN1280433 A CN 1280433A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- signal
- phase rotation
- absolute value
- 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.)
- Granted
Links
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
- H04L27/36—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
-
- 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
-
- 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
- H03F1/3294—Acting on the real and imaginary components of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3233—Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP192473/1999 | 1999-07-07 | ||
JP19247399A JP3834166B2 (ja) | 1999-07-07 | 1999-07-07 | 振幅計算回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1280433A true CN1280433A (zh) | 2001-01-17 |
CN1154311C CN1154311C (zh) | 2004-06-16 |
Family
ID=16291888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB001097741A Expired - Fee Related CN1154311C (zh) | 1999-07-07 | 2000-07-06 | 幅值计算电路 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6570914B1 (zh) |
JP (1) | JP3834166B2 (zh) |
CN (1) | CN1154311C (zh) |
AU (1) | AU764136B2 (zh) |
GB (1) | GB2352103B (zh) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7142811B2 (en) * | 2001-03-16 | 2006-11-28 | Aura Communications Technology, Inc. | Wireless communication over a transducer device |
EP1502362B1 (en) * | 2002-03-19 | 2011-06-22 | Powerwave Technologies, Inc. | System and method for eliminating signal zero crossings in single and multiple channel communication systems |
AU2004212605A1 (en) * | 2003-09-26 | 2005-04-14 | Nec Australia Pty Ltd | Computation of soft bits for a turbo decoder in a communication receiver |
WO2005055541A1 (en) * | 2003-12-04 | 2005-06-16 | Koninklijke Philips Electronics N.V. | Avoidance of discontinuities when switching between modulation schemes |
JP4566892B2 (ja) * | 2005-11-18 | 2010-10-20 | シャープ株式会社 | 複素信号の振幅計算装置および振幅計算方法 |
US9363469B2 (en) | 2008-07-17 | 2016-06-07 | Ppc Broadband, Inc. | Passive-active terminal adapter and method having automatic return loss control |
US9647851B2 (en) | 2008-10-13 | 2017-05-09 | Ppc Broadband, Inc. | Ingress noise inhibiting network interface device and method for cable television networks |
US8832767B2 (en) | 2008-10-16 | 2014-09-09 | Ppc Broadband, Inc. | Dynamically configurable frequency band selection device between CATV distribution system and CATV user |
US8385219B2 (en) * | 2009-10-09 | 2013-02-26 | John Mezzalingua Associates, Inc. | Upstream bandwidth level measurement device |
US8510782B2 (en) | 2008-10-21 | 2013-08-13 | Ppc Broadband, Inc. | CATV entry adapter and method for preventing interference with eMTA equipment from MoCA Signals |
US11910052B2 (en) | 2008-10-21 | 2024-02-20 | Ppc Broadband, Inc. | Entry device for communicating external network signals and in-home network signals |
US8479247B2 (en) | 2010-04-14 | 2013-07-02 | Ppc Broadband, Inc. | Upstream bandwidth conditioning device |
US8561125B2 (en) | 2010-08-30 | 2013-10-15 | Ppc Broadband, Inc. | Home network frequency conditioning device and method |
US10021343B2 (en) | 2010-12-21 | 2018-07-10 | Ppc Broadband, Inc. | Method and apparatus for reducing isolation in a home network |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2220315A (en) | 1988-07-01 | 1990-01-04 | Philips Electronic Associated | Signal amplitude-determining apparatus |
JP2655107B2 (ja) * | 1994-12-09 | 1997-09-17 | 日本電気株式会社 | スペクトラム拡散受信機 |
DE69728651T2 (de) * | 1996-11-19 | 2004-08-19 | Matsushita Electric Industrial Co., Ltd., Kadoma | Sender mit linearisiertem Verstärker |
JP3171157B2 (ja) * | 1997-12-10 | 2001-05-28 | 松下電器産業株式会社 | 非線形歪補償装置 |
-
1999
- 1999-07-07 JP JP19247399A patent/JP3834166B2/ja not_active Expired - Fee Related
-
2000
- 2000-06-29 US US09/607,144 patent/US6570914B1/en not_active Expired - Lifetime
- 2000-07-06 GB GB0016673A patent/GB2352103B/en not_active Expired - Fee Related
- 2000-07-06 CN CNB001097741A patent/CN1154311C/zh not_active Expired - Fee Related
- 2000-07-06 AU AU45065/00A patent/AU764136B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
JP3834166B2 (ja) | 2006-10-18 |
CN1154311C (zh) | 2004-06-16 |
JP2001024715A (ja) | 2001-01-26 |
AU764136B2 (en) | 2003-08-14 |
GB2352103A (en) | 2001-01-17 |
US6570914B1 (en) | 2003-05-27 |
GB2352103B (en) | 2001-09-19 |
GB0016673D0 (en) | 2000-08-23 |
AU4506500A (en) | 2001-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1154311C (zh) | 幅值计算电路 | |
CN1172500C (zh) | 数字正交调制器和解调器中的方法,以及数字正交调制器和解调器 | |
CN1158826C (zh) | 在调制系统限制信号幅度的方法 | |
CN1144437C (zh) | 调相信号载波恢复方法及装置 | |
CN1663214A (zh) | 正交调制器幅度失衡补偿 | |
CN1092231A (zh) | 用户使用的解调器 | |
CN1879295A (zh) | 预失真控制设备和方法,以及包含该预失真控制设备的组合体 | |
CN1747460A (zh) | 延迟同步环电路,数字预失真型发射机以及无线基站 | |
CN1430390A (zh) | 模拟积分调制器误差补偿的装置和方法 | |
CN1665232A (zh) | 高阶正交幅度调制中软解调软调制的快速实现方法 | |
CN1922842A (zh) | 正交调制装置、方法、程序、记录媒体 | |
CN1227878C (zh) | 用于信号的数字频率校正的方法和电路 | |
EP3588887B1 (en) | O-qpsk symbol timing estimation | |
US20090213953A1 (en) | Bit Log Likelihood Ratio (LLR) Computation of a 32-QAM System | |
CN1135803C (zh) | 非相干6端口接收机 | |
CN1148009C (zh) | 零差无线电接收机 | |
CN1905542A (zh) | 补偿直流偏移、增益偏移与相位偏移的方法及校正系统 | |
CN1400755A (zh) | 使用极坐标系的正交频分复用接收机及其方法 | |
CN1729617A (zh) | 传输器级 | |
CN1207846A (zh) | 在接收机中利用对数极坐标信号处理法滤波 | |
CN1131627C (zh) | 频率偏移量检测装置及方法 | |
JPWO2011033571A1 (ja) | 受信機 | |
CN1622449A (zh) | 数字变频器 | |
CN1514660A (zh) | 调制无线通讯信号的装置 | |
CN1993958A (zh) | 用于调相和/或调幅信号的复信号定标 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: LENOVO INNOVATION CO., LTD. (HONGKONG) Free format text: FORMER OWNER: NEC CORP. Effective date: 20141209 |
|
C41 | Transfer of patent application or patent right or utility model | ||
COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; TO: HONG KONG, CHINA |
|
TR01 | Transfer of patent right |
Effective date of registration: 20141209 Address after: Hongkong, China Patentee after: LENOVO INNOVATIONS Co.,Ltd.(HONG KONG) Address before: Tokyo, Japan Patentee before: NEC Corp. |
|
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040616 Termination date: 20160706 |