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WANG Shuo-zhong. PIECEWISE CORRELATOR IN DIGITAL CW SONAR[J]. ACTA ACUSTICA, 1988, 13(5): 349-355. DOI: 10.15949/j.cnki.0371-0025.1988.05.005
Citation: WANG Shuo-zhong. PIECEWISE CORRELATOR IN DIGITAL CW SONAR[J]. ACTA ACUSTICA, 1988, 13(5): 349-355. DOI: 10.15949/j.cnki.0371-0025.1988.05.005

PIECEWISE CORRELATOR IN DIGITAL CW SONAR

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  • Received Date: February 28, 1986
  • Revised Date: May 05, 1987
  • Available Online: August 08, 2022
  • Piecewise correlators can be used in sonars transmitting continuous narrow-band random signals to avoid decorrelation caused by phase fluctuation of received signals.Unlike a conventional heterodyne correlator,the piecewise correlator does not include a bandpass filter,making it particularly suitable to be used in a digital system.This paper derives the expressions of output signal-to-noise ratio for both analogue and polarity piecewise-correlators and gives some fundamental principles in choosing the number of pieces and their length.A polarity piecewise-correlator designed in accordance with these principles has been used in a practical system and produced satisfactory results.
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