WO2009079441A3 - I-q mismatch calibration and method - Google Patents

I-q mismatch calibration and method Download PDF

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Publication number
WO2009079441A3
WO2009079441A3 PCT/US2008/086793 US2008086793W WO2009079441A3 WO 2009079441 A3 WO2009079441 A3 WO 2009079441A3 US 2008086793 W US2008086793 W US 2008086793W WO 2009079441 A3 WO2009079441 A3 WO 2009079441A3
Authority
WO
WIPO (PCT)
Prior art keywords
bias
techniques
voltages
channel
separate
Prior art date
Application number
PCT/US2008/086793
Other languages
French (fr)
Other versions
WO2009079441A2 (en
Inventor
Ojas M. Choksi
Frederic Bossu
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to JP2010539673A priority Critical patent/JP2011507456A/en
Priority to CN200880121005.2A priority patent/CN101904145A/en
Priority to KR1020107015958A priority patent/KR101147891B1/en
Priority to EP08862284.0A priority patent/EP2223485B1/en
Publication of WO2009079441A2 publication Critical patent/WO2009079441A2/en
Publication of WO2009079441A3 publication Critical patent/WO2009079441A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing
    • H03M1/1009—Calibration
    • H03M1/1014—Calibration at one point of the transfer characteristic, i.e. by adjusting a single reference value, e.g. bias or gain error
    • H03M1/1019—Calibration at one point of the transfer characteristic, i.e. by adjusting a single reference value, e.g. bias or gain error by storing a corrected or correction value in a digital look-up table
    • 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
    • H04L2027/0018—Arrangements at the transmitter end
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are applied to bias the gates or bulks of the transistors in a mixer of the I channel versus a mixer of the Q channel. In another exemplary embodiment, separate voltages are applied to bias the common-mode reference voltage of a transimpedance amplifier associated with each channel. Techniques are further provided for deriving bias voltages to minimize a measured residual sideband in a received or transmitted signal, or to optimize other parameters of the received or transmitted signal. Techniques for generating separate bias voltages using a bidirectional and unidirectional current digital-to-analog converter (DAC) are also disclosed.
PCT/US2008/086793 2007-12-18 2008-12-15 I-q mismatch calibration and method WO2009079441A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2010539673A JP2011507456A (en) 2007-12-18 2008-12-15 I-Q mismatch calibration and method
CN200880121005.2A CN101904145A (en) 2007-12-18 2008-12-15 I-Q mismatch calibration and method
KR1020107015958A KR101147891B1 (en) 2007-12-18 2008-12-15 I-q mismatch calibration and method
EP08862284.0A EP2223485B1 (en) 2007-12-18 2008-12-15 I-q mismatch calibration and method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1466207P 2007-12-18 2007-12-18
US61/014,662 2007-12-18
US12/259,178 US8615205B2 (en) 2007-12-18 2008-10-27 I-Q mismatch calibration and method
US12/259,178 2008-10-27

Publications (2)

Publication Number Publication Date
WO2009079441A2 WO2009079441A2 (en) 2009-06-25
WO2009079441A3 true WO2009079441A3 (en) 2009-11-26

Family

ID=40753242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/086793 WO2009079441A2 (en) 2007-12-18 2008-12-15 I-q mismatch calibration and method

Country Status (7)

Country Link
US (3) US8615205B2 (en)
EP (2) EP2223485B1 (en)
JP (2) JP2011507456A (en)
KR (1) KR101147891B1 (en)
CN (2) CN101904145A (en)
TW (1) TW200950433A (en)
WO (1) WO2009079441A2 (en)

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