Please download the dossier by clicking on the dossier button x
×

SYSTEM AND METHOD FOR DECODING AUTOMATIC IDENTIFICATION SYSTEM SIGNALS

  • US 20080304597A1
  • Filed: 06/08/2007
  • Published: 12/11/2008
  • Est. Priority Date: 06/08/2007
  • Status: Active Grant
First Claim
Patent Images

1. A method for detecting and decoding Automatic Identification System (AIS) signals, the method comprising:

  • receiving a plurality of AIS signals at a satellite in space and pre-processing the plurality of AIS signals to produce digital input data;

    processing the digital input data by correlating the digital input data with a plurality of predefined signals having different Doppler offsets to compute a plurality of corresponding correlation signals and identifying one or more candidate AIS message signals based on the correlation signals;

    determining Doppler offset estimates and time estimates for the one or more candidate AIS message signals;

    decoding the one or more candidate AIS message signals to obtain corresponding message segments; and

    validating decoded message segments for proper AIS formatting.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×