Skip to Main content Skip to Navigation
Conference papers

Joint phase-recovery and demodulation-decoding of AIS signals received by satellite

Abstract : This paper presents a demodulation algorithm for automatic identification system (AIS) signals received by a satellite. The main contribution of this work is to consider the phase recovery problem for an unknown modulation index, coupled with a time-varying phase shift. The proposed method is based on a demodulator introduced in a previous paper based on a Viterbi-type algorithm applied to an extended trellis. The states of this extended trellis are composed of a trellis-code state and of a cyclic redundancy check state. The bit stuffing mechanism is taken into account by defining special conditional transitions in the extended trellis. This algorithm estimates and tracks the phase shift by modifying the Euclidean distance used in the trellis. Simulation results obtained with and without phase tracking are presented and compared in the context of the AIS system.
Complete list of metadata

Cited literature [16 references]  Display  Hide  Download
Contributor : Open Archive Toulouse Archive Ouverte (oatao) Connect in order to contact the contributor
Submitted on : Monday, May 4, 2015 - 1:51:01 PM
Last modification on : Tuesday, October 19, 2021 - 2:24:11 PM
Long-term archiving on: : Monday, September 14, 2015 - 6:15:33 PM


Files produced by the author(s)


  • HAL Id : hal-01148327, version 1
  • OATAO : 12727


Raoul Prévost, Martial Coulon, David Bonacci, Julia Lemaitre, Jean-Pierre Millerioux, et al.. Joint phase-recovery and demodulation-decoding of AIS signals received by satellite. IEEE International Conference on Acoustics, Speech, and Signal Processing - ICASSP 2013, May 2013, Vancouver, Canada. pp. 4913-4917. ⟨hal-01148327⟩



Record views


Files downloads