FR2993123A1 - Method for detecting presence of coded clock signal by frequency offset in acoustic signal, involves calculating inflection points presented by filtered function, where presence of clock signal is detected if filtered function presents zero - Google Patents

Method for detecting presence of coded clock signal by frequency offset in acoustic signal, involves calculating inflection points presented by filtered function, where presence of clock signal is detected if filtered function presents zero Download PDF

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Publication number
FR2993123A1
FR2993123A1 FR1256369A FR1256369A FR2993123A1 FR 2993123 A1 FR2993123 A1 FR 2993123A1 FR 1256369 A FR1256369 A FR 1256369A FR 1256369 A FR1256369 A FR 1256369A FR 2993123 A1 FR2993123 A1 FR 2993123A1
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France
Prior art keywords
clock signal
signal
filtered
filtered function
frequency offset
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FR1256369A
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French (fr)
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FR2993123B1 (en
Inventor
Jean Perret
Clovis Picard
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Tvty Fr
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Distribeo
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Priority to FR1256369A priority Critical patent/FR2993123B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H04L7/007—Detection of the synchronisation error by features other than the received signal transition detection of error based on maximum signal power, e.g. peak value, maximizing autocorrelation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit

Abstract

The method involves estimating a function of power received in course of time (202) for each frequency used to code a clock signal on a received signal. An integrated power function for generating a curve of filtered power is calculated (203). Inflection points presented by a filtered function on a half-period of the clock signal are calculated (204). A presence of the clock signal is detected (205) if the filtered function presents zero or a single inflection point signal on a half-period of the clock signal, by processing the curve of filtered power. Independent claims are also included for the following: (1) a device for detecting presence of a coded clock signal by a frequency offset in an analog signal (2) a computer program comprising a set of instructions for detecting presence of a coded clock signal by a frequency offset in an analog signal (3) an information storage unit.
FR1256369A 2012-07-03 2012-07-03 METHOD, DEVICE AND COMPUTER PROGRAM FOR CLOCK DETECTION IN A FREQUENCY DISPLACEMENT ACOUSTIC SIGNAL Active FR2993123B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1256369A FR2993123B1 (en) 2012-07-03 2012-07-03 METHOD, DEVICE AND COMPUTER PROGRAM FOR CLOCK DETECTION IN A FREQUENCY DISPLACEMENT ACOUSTIC SIGNAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1256369A FR2993123B1 (en) 2012-07-03 2012-07-03 METHOD, DEVICE AND COMPUTER PROGRAM FOR CLOCK DETECTION IN A FREQUENCY DISPLACEMENT ACOUSTIC SIGNAL

Publications (2)

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FR2993123A1 true FR2993123A1 (en) 2014-01-10
FR2993123B1 FR2993123B1 (en) 2016-01-01

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FR1256369A Active FR2993123B1 (en) 2012-07-03 2012-07-03 METHOD, DEVICE AND COMPUTER PROGRAM FOR CLOCK DETECTION IN A FREQUENCY DISPLACEMENT ACOUSTIC SIGNAL

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FR (1) FR2993123B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003090400A1 (en) * 2002-04-19 2003-10-30 Conexant Systems, Inc. System for and method of determining timing information from a multi-carrier signal
JP2007166208A (en) * 2005-12-13 2007-06-28 Kenwood Corp Fsk signal detection apparatus, receiver, and fsk signal detection method
US20110007625A1 (en) * 2009-07-10 2011-01-13 Mitsubishi Electric Corporation Demodulator and frame synchronization method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003090400A1 (en) * 2002-04-19 2003-10-30 Conexant Systems, Inc. System for and method of determining timing information from a multi-carrier signal
JP2007166208A (en) * 2005-12-13 2007-06-28 Kenwood Corp Fsk signal detection apparatus, receiver, and fsk signal detection method
US20110007625A1 (en) * 2009-07-10 2011-01-13 Mitsubishi Electric Corporation Demodulator and frame synchronization method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GERALD GOERTZEL: "An Algorithm for the Evaluation of Finite Trigonometric Series", THE AMERICAN MATHEMATICAL MONTHLY, vol. 65, no. 1, January 1958 (1958-01-01), pages 34 - 35, XP002692918, Retrieved from the Internet <URL:http://www.cs.washington.edu/education/courses/cse466/12au/calendar/Goertzel-original.pdf> [retrieved on 20130227], DOI: 10.2307/2310304 *

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Publication number Publication date
FR2993123B1 (en) 2016-01-01

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