Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2011-05-17
2011-05-17
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S343000
Reexamination Certificate
active
07944984
ABSTRACT:
An I/Q calibration system for a quadrature amplitude modulation (QAM) mode transceiver includes a signal generator that generates reference in-phase (I) and quadrature (Q) signals. An I/Q mismatch compensation module generates compensated I and Q signals based on the reference I and Q signals and amplitude and phase correction signals. An I/Q mismatch calibration module generates the amplitude and phase correction signals. A phase stepper module varies a phase of the reference I and Q signals based on the amplitude and phase correction signals.
REFERENCES:
patent: 5371481 (1994-12-01), Tiittanen et al.
patent: 5903823 (1999-05-01), Moriyama et al.
patent: 6044112 (2000-03-01), Koslov
patent: 6340883 (2002-01-01), Nara et al.
patent: 6763227 (2004-07-01), Kramer
patent: 7346122 (2008-03-01), Cao
patent: 7382297 (2008-06-01), Kopikare et al.
patent: 7480348 (2009-01-01), Nakano
patent: 7647026 (2010-01-01), Darabi
patent: 2003/0174783 (2003-09-01), Rahman et al.
patent: 2003/0231723 (2003-12-01), Hansen
patent: 2004/0146120 (2004-07-01), Brown
patent: 2005/0075815 (2005-04-01), Webster et al.
patent: 2005/0148304 (2005-07-01), Jerng
patent: 2005/0152463 (2005-07-01), DeChamps et al.
ANSI/IEEE Std 802.11, 1999 Edition; Information technology—Telecommunications and information exchange between—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications; LAN/MAN Standards Committee of the IEEE Computer Society; 528 pages.
IEEE Std 802.11a-1999 (Supplement to IEEE Std 802.11-1999) [Adopted by ISO/IEC and redesignated as ISO/IEC 8802-11: 1999/Amd 1:2000(E)]; Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications High-speed Physical Layer in the 5 GHz Band; LAN/MAN Standards Committee of the IEEE Computer Society; 91 pages.
IEEE Std 802.11b-1999 (Supplement to IEEE Std 802.11-1999 Edition); Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specificiations: Higher-Speed Physical Layer Extension in the 2.4 GHz Band; LAN/MAN Standards Committee of the IEEE Computer Society; Sep. 16, 1999 IEEE-SA Standards Board; 96 pages.
IEEE P802.11g/D8.2, Apr. 2003 (Supplement to ANSI/IEEE Std 802.11-1999(Reaff 2003)); Draft Supplement to Standard [for] Information Technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Further Higher Data Rate Extension in the 2.4 GHz Band; LAN/MAN Standards Committee of the IEEE Computer Society; 69 pages.
IEEE Std 802.11h—2003 (Amendment to IEEE Std 802.11, 1999 Edition (Reaff 2003)); as amended by IEEE Stds 802.11a-1999, 802.11b-1999, 802.11b-1999/Cor 1-2001, 802.11d-2001, and 802.11g-2003; IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications Amendment 5: Spectrum and Transmit Power Management Extensions in the 5 GHz band in Europe; IEEE Computer Society LAN/MAN Standards Committee; Oct. 14, 2003; 74 pages.
802.11n; IEEE P802.11-04/0889r6; Wireless LANs, TGn Sync Proposal Technical Specification; May 2005; 131 pages.
IEEE Std 802.16-2004 (revision of IEEE Std 802.16-2001) IEE Standard for Local and metropolitan area networks; Part 16: Air Interface for Fixed Broadband Wireless Access Systems; IEEE Computer Society and the IEEE Microwave Theory and Techniquest Society; Oct. 1, 2004; 893 pages.
IEEE 802.20-PD-06, IEEE P 802.20 V14, Jul. 16, 2004, Draft 802.20 Permanent Document, System Requirements for IEEE 802.20 Mobile Broadband Wireless Access Systems—Version 14, 23 pages.
Cho Thomas B.
Lou Hui-Ling
Salhotra Atul
Wu Songping
Zhao Qing
Liu Shuwang
Marvell International Ltd.
Tayong Helene
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