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WO2009038450A3 - Method and apparatus for detecting a narrow band signal immersed in a wideband signal - Google Patents

Method and apparatus for detecting a narrow band signal immersed in a wideband signal Download PDF

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Publication number
WO2009038450A3
WO2009038450A3 PCT/MY2008/000104 MY2008000104W WO2009038450A3 WO 2009038450 A3 WO2009038450 A3 WO 2009038450A3 MY 2008000104 W MY2008000104 W MY 2008000104W WO 2009038450 A3 WO2009038450 A3 WO 2009038450A3
Authority
WO
WIPO (PCT)
Prior art keywords
narrow band
band signal
frequency
signal
immersed
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/MY2008/000104
Other languages
French (fr)
Other versions
WO2009038450A2 (en
Inventor
Ayman Ahmed Mahmoud Abdel-Samad
Essam Abdel-Fattah Sourour Sourour
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mimos Bhd
Original Assignee
Mimos Bhd
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 Mimos Bhd filed Critical Mimos Bhd
Publication of WO2009038450A2 publication Critical patent/WO2009038450A2/en
Publication of WO2009038450A3 publication Critical patent/WO2009038450A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

There is disclosed a method and apparatus adapted for the detection of a narrow band signal immersed in a wide band signal. Generally, the center frequency of the narrow band signal is known to be within an ambiguity region of the signals. The ambiguity region will be partitioned into N sections. Each frame of the received composite signal (narrow band + wide band) is then frequency shifted N times digitally such that, after each shift, one of the N sections centered at zero frequency. The N frequency-shifted composite signals are filtered by the same low-pass filter (62) and the N outputs are buffered by the frame buffering means (54). With this procedure, the narrow band signal, if present, will be at one of the N filtered outputs. To detect the narrow band signal, each buffered filter output is multiplied by a delayed and conjugated version of itself. A moving average is then applied on the result of the multiplication and the maximum of the absolute value of the moving average is found. If the largest of the N maxima is larger than a threshold, the narrow band signal is detected and identified as the control channel. High SNR samples are subsequently selected for estimating the frequency offset of the narrow band signal.
PCT/MY2008/000104 2007-09-19 2008-09-19 Method and apparatus for detecting a narrow band signal immersed in a wideband signal Ceased WO2009038450A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20071568 2007-09-19
MYPI20071568A MY146218A (en) 2007-09-19 2007-09-19 Method and apparatus for detecting a narrow band signal immersed in a wideband signal

Publications (2)

Publication Number Publication Date
WO2009038450A2 WO2009038450A2 (en) 2009-03-26
WO2009038450A3 true WO2009038450A3 (en) 2009-06-04

Family

ID=40468663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2008/000104 Ceased WO2009038450A2 (en) 2007-09-19 2008-09-19 Method and apparatus for detecting a narrow band signal immersed in a wideband signal

Country Status (2)

Country Link
MY (1) MY146218A (en)
WO (1) WO2009038450A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9781675B2 (en) 2015-12-03 2017-10-03 Qualcomm Incorporated Detecting narrow band signals in wide-band interference

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6421099B1 (en) * 1998-11-28 2002-07-16 Samsung Electronics Co., Ltd. Automatic frequency tracking apparatus and method for a television signal receiving system
US20030189978A1 (en) * 2002-04-09 2003-10-09 Jingdong Lin Phase difference based frequency correction channel detector for wireless communication system
WO2004010624A1 (en) * 2002-07-19 2004-01-29 Open Solution Co., Ltd. Ofdm receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6421099B1 (en) * 1998-11-28 2002-07-16 Samsung Electronics Co., Ltd. Automatic frequency tracking apparatus and method for a television signal receiving system
US20030189978A1 (en) * 2002-04-09 2003-10-09 Jingdong Lin Phase difference based frequency correction channel detector for wireless communication system
WO2004010624A1 (en) * 2002-07-19 2004-01-29 Open Solution Co., Ltd. Ofdm receiver

Also Published As

Publication number Publication date
MY146218A (en) 2012-07-31
WO2009038450A2 (en) 2009-03-26

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