GB0217219D0 - Constellation error vector usage through gain and phase impairments in QAM demodulators - Google Patents
Constellation error vector usage through gain and phase impairments in QAM demodulatorsInfo
- Publication number
- GB0217219D0 GB0217219D0 GB0217219A GB0217219A GB0217219D0 GB 0217219 D0 GB0217219 D0 GB 0217219D0 GB 0217219 A GB0217219 A GB 0217219A GB 0217219 A GB0217219 A GB 0217219A GB 0217219 D0 GB0217219 D0 GB 0217219D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- gain
- error vector
- constellation error
- qam demodulators
- vector usage
- 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.)
- Ceased
Links
- 230000006735 deficit Effects 0.000 title 1
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0217219A GB0217219D0 (en) | 2002-07-25 | 2002-07-25 | Constellation error vector usage through gain and phase impairments in QAM demodulators |
PCT/GB2003/003282 WO2004012409A1 (en) | 2002-07-25 | 2003-07-25 | Detection and compensation of constellation impairments |
AU2003255733A AU2003255733A1 (en) | 2002-07-25 | 2003-07-25 | Detection and compensation of constellation impairments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0217219A GB0217219D0 (en) | 2002-07-25 | 2002-07-25 | Constellation error vector usage through gain and phase impairments in QAM demodulators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB0217219D0 true GB0217219D0 (en) | 2002-09-04 |
Family
ID=9941057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0217219A Ceased GB0217219D0 (en) | 2002-07-25 | 2002-07-25 | Constellation error vector usage through gain and phase impairments in QAM demodulators |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003255733A1 (en) |
GB (1) | GB0217219D0 (en) |
WO (1) | WO2004012409A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683578A (en) * | 1985-07-05 | 1987-07-28 | Paradyne Corporation | Automatic gain control using the extreme points of a constellation |
EP0324581A3 (en) * | 1988-01-13 | 1990-11-07 | Hewlett-Packard Company | Calibration of vector demodulator using statistical analysis |
US5705949A (en) * | 1996-09-13 | 1998-01-06 | U.S. Robotics Access Corp. | Compensation method for I/Q channel imbalance errors |
FI117494B (en) * | 1996-11-29 | 2006-10-31 | Nokia Corp | Procedure in a digital quadrature modulator and in a quadrature demodulator, digital quadrature modulator and quadrature demodulator |
US6044112A (en) * | 1997-07-03 | 2000-03-28 | Hitachi America, Ltd. | Methods and apparatus for correcting amplitude and phase imbalances in demodulators |
US6222878B1 (en) * | 1999-09-27 | 2001-04-24 | Sicom, Inc. | Communication system with end-to-end quadrature balance control |
US7991044B1 (en) * | 2000-11-22 | 2011-08-02 | Sunrise Telecom Incorporated | System and method for automatic diagnosis of impairments in a digital quadrature amplitude modulated signal |
US7061994B2 (en) * | 2001-06-21 | 2006-06-13 | Flarion Technologies, Inc. | Methods and apparatus for I/Q imbalance compensation |
KR100441616B1 (en) * | 2001-12-14 | 2004-07-23 | 한국전자통신연구원 | Method for detecting and correcting applitude and phase imbalances between in-phase and quadrature-phase components of a receiving signal in demodulators, and quadrature demodulator using the same method |
-
2002
- 2002-07-25 GB GB0217219A patent/GB0217219D0/en not_active Ceased
-
2003
- 2003-07-25 AU AU2003255733A patent/AU2003255733A1/en not_active Abandoned
- 2003-07-25 WO PCT/GB2003/003282 patent/WO2004012409A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
AU2003255733A1 (en) | 2004-02-16 |
WO2004012409A1 (en) | 2004-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AT | Applications terminated before publication under section 16(1) |