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GB2213006B - Correction of rf errors in quadrature channels of a zero-if transmitter - Google Patents

Correction of rf errors in quadrature channels of a zero-if transmitter

Info

Publication number
GB2213006B
GB2213006B GB8727833A GB8727833A GB2213006B GB 2213006 B GB2213006 B GB 2213006B GB 8727833 A GB8727833 A GB 8727833A GB 8727833 A GB8727833 A GB 8727833A GB 2213006 B GB2213006 B GB 2213006B
Authority
GB
United Kingdom
Prior art keywords
errors
transmitter
correction
zero
quadrature channels
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 - Lifetime
Application number
GB8727833A
Other versions
GB8727833D0 (en
GB2213006A (en
Inventor
Andrew Paul Lewis
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.)
STC PLC
Original Assignee
STC 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 STC PLC filed Critical STC PLC
Priority to GB8727833A priority Critical patent/GB2213006B/en
Publication of GB8727833D0 publication Critical patent/GB8727833D0/en
Publication of GB2213006A publication Critical patent/GB2213006A/en
Application granted granted Critical
Publication of GB2213006B publication Critical patent/GB2213006B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/02—Details
    • H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/60—Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed
GB8727833A 1987-11-27 1987-11-27 Correction of rf errors in quadrature channels of a zero-if transmitter Expired - Lifetime GB2213006B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8727833A GB2213006B (en) 1987-11-27 1987-11-27 Correction of rf errors in quadrature channels of a zero-if transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8727833A GB2213006B (en) 1987-11-27 1987-11-27 Correction of rf errors in quadrature channels of a zero-if transmitter

Publications (3)

Publication Number Publication Date
GB8727833D0 GB8727833D0 (en) 1987-12-31
GB2213006A GB2213006A (en) 1989-08-02
GB2213006B true GB2213006B (en) 1992-01-29

Family

ID=10627649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8727833A Expired - Lifetime GB2213006B (en) 1987-11-27 1987-11-27 Correction of rf errors in quadrature channels of a zero-if transmitter

Country Status (1)

Country Link
GB (1) GB2213006B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265269B (en) * 1992-03-02 1995-08-30 Motorola Ltd Radio transmitter with linearization training sequence
US5371481A (en) * 1993-03-24 1994-12-06 Nokia Mobile Phones Ltd. Tuning techniques for I/Q channel signals in microwave digital transmission systems
US5412352A (en) * 1994-04-18 1995-05-02 Stanford Telecommunications, Inc. Modulator having direct digital synthesis for broadband RF transmission
US5574992A (en) * 1994-04-29 1996-11-12 Motorola, Inc. Method and apparatus for reducing off-channel interference produced by a linear transmitter
DE19635330A1 (en) * 1996-08-30 1998-03-12 Siemens Ag Method and arrangement for modulator-specific compensation of DC voltage deviations of a modulator
US6167247A (en) * 1998-07-15 2000-12-26 Lucent Technologies, Inc. Local oscillator leak cancellation circuit
US6745015B2 (en) * 2001-02-08 2004-06-01 Motorola, Inc. Method for automatic carrier suppression tuning of a wireless communication device
US6763227B2 (en) * 2001-11-07 2004-07-13 Texas Instruments Incorporated Systems and methods for modulator calibration
EP1537744A1 (en) 2002-09-06 2005-06-08 Koninklijke Philips Electronics N.V. Parameter encoding for an improved atsc dtv system
CN100472941C (en) 2003-04-24 2009-03-25 皇家飞利浦电子股份有限公司 Quadrature modulator and calibration method thereof
EP1733524B1 (en) * 2004-03-31 2007-11-07 Nxp B.V. Receiver for a multi-carrier signal
US7660563B2 (en) * 2005-09-26 2010-02-09 Cypress Semiconductor Corporation Apparatus and method for calibrating mixer offset
EP2458729A1 (en) 2010-11-30 2012-05-30 Nxp B.V. A Gilbert mixer including decoupling means

Also Published As

Publication number Publication date
GB8727833D0 (en) 1987-12-31
GB2213006A (en) 1989-08-02

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20071126