J4 ›› 2011, Vol. 29 ›› Issue (6): 523-528.

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Detection of Two Phase-Code Signal Based on Wavelet Transform

NING Hui1, CHEN Chao2   

  1. 1. Research Office of Special Equipment, Beijing Aviation Engineering Technique Research Center, Beijing 100076, China|
    2. Department of Aviation Electronical Engineering,Aviation University of Air Force, Changchun 130022,China
  • Online:2011-11-24 Published:2011-12-06

Abstract:

For the detection of phase-code signal with low SNR(Signal-to-Noise Ratio), two phase-code signal was studied based on  double-scale wavelet transform, according to the combination of rough orientation and accurate orientation. The modular maximum of big scale is used to find the range of the singularity, the exact point of the singularity is found on a small scale, so that the detection of two phasecode signal would be achieved. Through the computer emulation, this algorithm can realize the detection of the two phase-code signal accurately when the SNR exceeds 0 dB,detection probability would be upon 95% when the SNR exceeds 3 dB.

Key words: wavelet transform;double-scale;two phase-code signal;signal detection

CLC Number: 

  • TN957.51