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 demodulators

Info

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
Application number
GB0217219A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arris Global Ltd
Original Assignee
Pace Micro Technology PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pace Micro Technology PLC filed Critical Pace Micro Technology PLC
Priority to GB0217219A priority Critical patent/GB0217219D0/en
Publication of GB0217219D0 publication Critical patent/GB0217219D0/en
Priority to PCT/GB2003/003282 priority patent/WO2004012409A1/en
Priority to AU2003255733A priority patent/AU2003255733A1/en
Ceased legal-status Critical Current

Links

GB0217219A 2002-07-25 2002-07-25 Constellation error vector usage through gain and phase impairments in QAM demodulators Ceased GB0217219D0 (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
AU2003255733A1 (en) 2004-02-16
WO2004012409A1 (en) 2004-02-05

Similar Documents

Publication Publication Date Title
AU2003264741A1 (en) Magnitude and phase imbalance calibration and compensation in quadrature receivers
AU2002321694A1 (en) Quadrature demodulator using a fft-processor
AU2001237059A1 (en) Phase noise and additive noise estimation in a qam carrier recovery circuit
AU4469500A (en) Backpack having removable, re-positionable carrying straps
AU2003240535A1 (en) Luer-actuated connector with membrane and container using the connector
AU2003280499A8 (en) Improving hierarchical 8psk performance
AUPR440901A0 (en) Error detection and correction
EP1614149A4 (en) Sample and hold circuits and methods with offset error correction and systems using the same
AU2003238456A1 (en) Viral vector
IL165136A0 (en) Data packet flow error correcting methods and devices
AU2003258210A8 (en) Fuel-cell integral multifunction heater and methods
GB0031771D0 (en) Bit reduction using dither,rounding and error feedback
AU2003248522A8 (en) Microporous, mixed polymer phase membrane
GB0217219D0 (en) Constellation error vector usage through gain and phase impairments in QAM demodulators
GB2380949B (en) Improvements in and relating to camming devices
GB2387284B (en) High-efficiency circuit for demodulating carriers in quadrature
GB0009302D0 (en) Quadrature amplitude modulation demodulation and receiver
GB0026624D0 (en) Error detection and correction
AU7745900A (en) Timing recovery circuit in qam modems
GB2392354B (en) Integrated modulators and demodulators
AU2002316759A1 (en) Phase-locked loop with analog phase rotator
AU2003214764A1 (en) Quadrature phase control loop
AU2003243422A8 (en) Quadratic video demodulation with baseband nyquist filter
EP1241790A3 (en) Full digital phase locked loop and circuitry for utilizing the same
AU2002358918A1 (en) Surfing handcart for jointly transporting an assembled sail and a surfboard

Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)