WO2009076563A3 - Method and apparatus for compensating dc offsets in communication systems - Google Patents

Method and apparatus for compensating dc offsets in communication systems Download PDF

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Publication number
WO2009076563A3
WO2009076563A3 PCT/US2008/086489 US2008086489W WO2009076563A3 WO 2009076563 A3 WO2009076563 A3 WO 2009076563A3 US 2008086489 W US2008086489 W US 2008086489W WO 2009076563 A3 WO2009076563 A3 WO 2009076563A3
Authority
WO
WIPO (PCT)
Prior art keywords
averaged
time
offset
offsets
compensating
Prior art date
Application number
PCT/US2008/086489
Other languages
French (fr)
Other versions
WO2009076563A2 (en
Inventor
Helena Deirdre O'shea
Original Assignee
Qualcomm Inc
Helena Deirdre O'shea
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 Inc, Helena Deirdre O'shea filed Critical Qualcomm Inc
Priority to JP2010538171A priority Critical patent/JP5199388B2/en
Priority to CN2008801198099A priority patent/CN101889416A/en
Priority to EP08859190A priority patent/EP2223484A2/en
Priority to KR1020107012575A priority patent/KR101127781B1/en
Publication of WO2009076563A2 publication Critical patent/WO2009076563A2/en
Publication of WO2009076563A3 publication Critical patent/WO2009076563A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
    • H04L25/063—Setting decision thresholds using feedback techniques only

Abstract

A communications system receiver incorporates a time-averaged DC component subtracter to subtract a time-averaged DC offset component from a received, processed signal. The time-averaged DC offset is selectably calculated from a moving average or a running average. The selection of the time-averaged DC offset can be done depending on whether the receiver operates in a frequency hop mode or not.
PCT/US2008/086489 2007-12-12 2008-12-11 Method and apparatus for compensating dc offsets in communication systems WO2009076563A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2010538171A JP5199388B2 (en) 2007-12-12 2008-12-11 Method and apparatus for compensating for DC offset in a communication system
CN2008801198099A CN101889416A (en) 2007-12-12 2008-12-11 Method and apparatus for compensating DC offsets in communication systems
EP08859190A EP2223484A2 (en) 2007-12-12 2008-12-11 Method and apparatus for compensating dc offsets in communication systems
KR1020107012575A KR101127781B1 (en) 2007-12-12 2008-12-11 Method and apparatus for compensating dc offsets in communication systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/955,159 US8559559B2 (en) 2002-06-20 2007-12-12 Method and apparatus for compensating DC offsets in communication systems
US11/955,159 2007-12-12

Publications (2)

Publication Number Publication Date
WO2009076563A2 WO2009076563A2 (en) 2009-06-18
WO2009076563A3 true WO2009076563A3 (en) 2009-07-30

Family

ID=40568451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/086489 WO2009076563A2 (en) 2007-12-12 2008-12-11 Method and apparatus for compensating dc offsets in communication systems

Country Status (7)

Country Link
US (1) US8559559B2 (en)
EP (1) EP2223484A2 (en)
JP (1) JP5199388B2 (en)
KR (1) KR101127781B1 (en)
CN (1) CN101889416A (en)
TW (1) TW200950427A (en)
WO (1) WO2009076563A2 (en)

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See also references of EP2223484A2 *

Also Published As

Publication number Publication date
US8559559B2 (en) 2013-10-15
KR101127781B1 (en) 2012-03-27
CN101889416A (en) 2010-11-17
JP5199388B2 (en) 2013-05-15
KR20100074337A (en) 2010-07-01
TW200950427A (en) 2009-12-01
JP2011507408A (en) 2011-03-03
US20080089391A1 (en) 2008-04-17
WO2009076563A2 (en) 2009-06-18
EP2223484A2 (en) 2010-09-01

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