WO2002091104A3 - Self-correlation detection and in-band and out-of-band signal detection for automatic gain calibration systems - Google Patents

Self-correlation detection and in-band and out-of-band signal detection for automatic gain calibration systems Download PDF

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Publication number
WO2002091104A3
WO2002091104A3 PCT/US2002/010868 US0210868W WO02091104A3 WO 2002091104 A3 WO2002091104 A3 WO 2002091104A3 US 0210868 W US0210868 W US 0210868W WO 02091104 A3 WO02091104 A3 WO 02091104A3
Authority
WO
WIPO (PCT)
Prior art keywords
band
signal
automatic gain
self
new
Prior art date
Application number
PCT/US2002/010868
Other languages
French (fr)
Other versions
WO2002091104A2 (en
Inventor
Paul J Husted
Lars E Thon
William Mcfarland
Tao-Fei Samuel Ng
Original Assignee
Atheros Comm Inc
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
Priority claimed from US09/849,595 external-priority patent/US6785523B2/en
Priority claimed from US09/849,442 external-priority patent/US6721547B2/en
Application filed by Atheros Comm Inc filed Critical Atheros Comm Inc
Priority to AU2002340525A priority Critical patent/AU2002340525A1/en
Publication of WO2002091104A2 publication Critical patent/WO2002091104A2/en
Publication of WO2002091104A3 publication Critical patent/WO2002091104A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/165—Equalizers; Volume or gain control in limited frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

An embodiment of the present invention provides an automatic gain control system for a wireless receiver that quickly differentiates desired in-band signals from high power out-of-band signals that overlap into the target band. The system measures power before and after passing a received signal through a pair of finite impulse response filteres (205-IP), (210-IP), (205-Q), (210-Q) and (220) that largely restrict the signal's power to that which is in-band. By comprising the in-band energy of the received signal after filtering to the total signal energy prior to filtering (215), it is possible to determine whether a new in-band signal has arrived. The presence of this new in-band signal is then verified by a multi-threshold comparison of the normalized self-correlation (225) to verify the presence of a new, desired in-band signal.
PCT/US2002/010868 2001-05-04 2002-04-05 Self-correlation detection and in-band and out-of-band signal detection for automatic gain calibration systems WO2002091104A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002340525A AU2002340525A1 (en) 2001-05-04 2002-04-05 Self-correlation detection and in-band and out-of-band signal detection for automatic gain calibration systems

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/849,595 US6785523B2 (en) 2001-05-04 2001-05-04 Self-correlation detection in automatic gain calibration
US09/849,442 2001-05-04
US09/849,442 US6721547B2 (en) 2001-05-04 2001-05-04 In-band and out-of-band signal detection for automatic gain calibration systems
US09/849,595 2001-05-04

Publications (2)

Publication Number Publication Date
WO2002091104A2 WO2002091104A2 (en) 2002-11-14
WO2002091104A3 true WO2002091104A3 (en) 2003-02-06

Family

ID=27126847

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/010868 WO2002091104A2 (en) 2001-05-04 2002-04-05 Self-correlation detection and in-band and out-of-band signal detection for automatic gain calibration systems

Country Status (3)

Country Link
AU (1) AU2002340525A1 (en)
TW (1) TW577197B (en)
WO (1) WO2002091104A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047323A1 (en) * 2002-11-18 2004-06-03 Koninklijke Philips Electronics N.V. Automatic gain control using signal and interference power to obtain extended blocking performance
US7522669B2 (en) * 2003-02-21 2009-04-21 Atheros Communications, Inc. Method and apparatus for selective disregard of co-channel transmissions on a medium
KR100519968B1 (en) * 2003-12-09 2005-10-13 삼성전자주식회사 Digital cable receiver capable of improving a reception performance for addition signal in Out-Of-Band and a mehtod receiving thereof
EP1605587A1 (en) * 2004-06-07 2005-12-14 Infineon Technologies AG A receiver comprised in a radio communication system
US7702044B2 (en) * 2005-12-05 2010-04-20 Marvell World Trade, Ltd. Radar detection and dynamic frequency selection
US7653368B2 (en) * 2006-06-14 2010-01-26 Intel Corporation Radio receiver and a method thereof
TW200945808A (en) 2008-04-23 2009-11-01 Sunplus Technology Co Ltd Wireless receiving system and method thereof with automatic gain control function
EP4391395A1 (en) * 2022-12-22 2024-06-26 STMicroelectronics (Grand Ouest) SAS Method for demodulating a rf signal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5999561A (en) * 1997-05-20 1999-12-07 Sanconix, Inc. Direct sequence spread spectrum method, computer-based product, apparatus and system tolerant to frequency reference offset
US6067293A (en) * 1996-12-11 2000-05-23 Nec Corporation Receiver
US6134430A (en) * 1997-12-09 2000-10-17 Younis; Saed G. Programmable dynamic range receiver with adjustable dynamic range analog to digital converter
US6219334B1 (en) * 1997-03-14 2001-04-17 Kabushiki Kaisha Toshiba Receiving apparatus for receiving orthogonal frequency division multiplexing signal and receiving method thereof
US6324387B1 (en) * 1998-12-29 2001-11-27 Philips Electronics N.A. Corp. LNA control-circuit for receive closed loop automatic gain control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067293A (en) * 1996-12-11 2000-05-23 Nec Corporation Receiver
US6219334B1 (en) * 1997-03-14 2001-04-17 Kabushiki Kaisha Toshiba Receiving apparatus for receiving orthogonal frequency division multiplexing signal and receiving method thereof
US5999561A (en) * 1997-05-20 1999-12-07 Sanconix, Inc. Direct sequence spread spectrum method, computer-based product, apparatus and system tolerant to frequency reference offset
US6134430A (en) * 1997-12-09 2000-10-17 Younis; Saed G. Programmable dynamic range receiver with adjustable dynamic range analog to digital converter
US6324387B1 (en) * 1998-12-29 2001-11-27 Philips Electronics N.A. Corp. LNA control-circuit for receive closed loop automatic gain control

Also Published As

Publication number Publication date
AU2002340525A1 (en) 2002-11-18
WO2002091104A2 (en) 2002-11-14
TW577197B (en) 2004-02-21

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