WO2013126302A3 - Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators - Google Patents
Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators Download PDFInfo
- Publication number
- WO2013126302A3 WO2013126302A3 PCT/US2013/026572 US2013026572W WO2013126302A3 WO 2013126302 A3 WO2013126302 A3 WO 2013126302A3 US 2013026572 W US2013026572 W US 2013026572W WO 2013126302 A3 WO2013126302 A3 WO 2013126302A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impairments
- transmitter
- mechanisms
- signals
- receiver
- Prior art date
Links
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
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
- H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
-
- 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
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3863—Compensation for quadrature error in the received signal
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Transceivers (AREA)
Abstract
Mechanisms for reducing I/Q impairments in communication devices are described. A transmitter performs pre-correction on digital I/Q signals before converting them into analog I/Q signals, to pre-compensate for I/Q impairments which will subsequently be introduced during digital-to-analog conversion, I/Q modulation, or other processing that occurs to produce a transmission signal. A receiver receives a transmission signal, produces digital I/Q signals from it, and performs filtering on the digital I/Q signals to correct I/Q impairments at a plurality of frequency offsets. Furthermore, mechanisms for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators or using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, for computing DC properties of a signal path between the transmitter and receiver, and for transforming I/Q impairments through a linear system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380004425.3A CN104040982B (en) | 2012-02-24 | 2013-02-18 | The mechanism of correction is detracted for I/Q and detracts measurement using the transmitter for offseting local oscillator |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/404,896 | 2012-02-24 | ||
US13/404,851 US8638893B2 (en) | 2012-02-24 | 2012-02-24 | Mechanisms for the correction of I/Q impairments |
US13/404,851 | 2012-02-24 | ||
US13/404,896 US8442150B1 (en) | 2012-02-24 | 2012-02-24 | Measurement of transmitter impairments using offset local oscillators |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013126302A2 WO2013126302A2 (en) | 2013-08-29 |
WO2013126302A3 true WO2013126302A3 (en) | 2014-01-03 |
Family
ID=47833373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2013/026572 WO2013126302A2 (en) | 2012-02-24 | 2013-02-18 | Mechanisms for the correction of i/q impairments, and measurement of transmitter impairments using offset local oscillators |
Country Status (2)
Country | Link |
---|---|
CN (2) | CN107579941B (en) |
WO (1) | WO2013126302A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3485588A1 (en) * | 2016-07-14 | 2019-05-22 | Cisco Technology, Inc. | Optical transceiver compensation, monitoring and alarming |
CN110708084B (en) * | 2019-10-15 | 2022-04-29 | 成都振芯科技股份有限公司 | Envelope detection based originating IQ correction circuit and method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030072393A1 (en) * | 2001-08-02 | 2003-04-17 | Jian Gu | Quadrature transceiver substantially free of adverse circuitry mismatch effects |
WO2005029798A1 (en) * | 2003-09-15 | 2005-03-31 | Intel Corporation | Adaptive iq imbalance correction for multicarrier wireless communication systems |
US6940916B1 (en) * | 2000-01-27 | 2005-09-06 | Pmc-Sierra, Inc. | Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction |
US20090323861A1 (en) * | 2008-06-30 | 2009-12-31 | Saeid Safavi | System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver |
US7706475B1 (en) * | 2005-04-15 | 2010-04-27 | Marvell International Ltd. | Compensation of I/Q mismatch in a communication system using I/Q modulation |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7269394B2 (en) * | 2002-10-02 | 2007-09-11 | Agere Systems Inc. | Frequency offset compensation for communication systems |
US7962113B2 (en) * | 2005-10-31 | 2011-06-14 | Silicon Laboratories Inc. | Receiver with multi-tone wideband I/Q mismatch calibration and method therefor |
US7881402B2 (en) * | 2006-09-07 | 2011-02-01 | Via Technologies, Inc. | Compensation for gain imbalance, phase imbalance and DC offsets in a transmitter |
CN101188430B (en) * | 2006-11-15 | 2012-05-16 | 中兴通讯股份有限公司 | A frequency deviation pre-compensation device and method for broadband code division multiple address user device |
US7848450B2 (en) * | 2007-03-22 | 2010-12-07 | Texas Instruments Incorporated | Methods and apparatus to pre-compensate for I/Q distortion in quadrature transmitters |
US8532237B2 (en) * | 2010-02-09 | 2013-09-10 | Provigent Ltd | Correction of alternating I/Q imbalance and frequency offset impairments |
-
2013
- 2013-02-18 WO PCT/US2013/026572 patent/WO2013126302A2/en active Application Filing
- 2013-02-18 CN CN201710967762.2A patent/CN107579941B/en active Active
- 2013-02-18 CN CN201380004425.3A patent/CN104040982B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6940916B1 (en) * | 2000-01-27 | 2005-09-06 | Pmc-Sierra, Inc. | Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction |
US20030072393A1 (en) * | 2001-08-02 | 2003-04-17 | Jian Gu | Quadrature transceiver substantially free of adverse circuitry mismatch effects |
WO2005029798A1 (en) * | 2003-09-15 | 2005-03-31 | Intel Corporation | Adaptive iq imbalance correction for multicarrier wireless communication systems |
US7706475B1 (en) * | 2005-04-15 | 2010-04-27 | Marvell International Ltd. | Compensation of I/Q mismatch in a communication system using I/Q modulation |
US20090323861A1 (en) * | 2008-06-30 | 2009-12-31 | Saeid Safavi | System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver |
Also Published As
Publication number | Publication date |
---|---|
WO2013126302A2 (en) | 2013-08-29 |
CN104040982A (en) | 2014-09-10 |
CN107579941A (en) | 2018-01-12 |
CN104040982B (en) | 2017-10-24 |
CN107579941B (en) | 2020-05-19 |
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