Prévost, Raoul and Coulon, Martial and Bonacci, David and LeMaitre, Julia and Millerioux, Jean-Pierre and Tourneret, Jean-Yves Partial CRC-assisted error correction of AIS signals received by satellite. (2014) In: IEEE International Conference on Acoustics, Speech, and Signal Processing - ICASSP 2014, 4 May 2014 - 9 May 2014 (Florence, Italy).
(Document in English)
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Official URL: http://dx.doi.org/10.1109/ICASSP.2014.6853939
This paper deals with the demodulation of automatic identification system (AIS) signals received by a satellite. More precisely, an error correction algorithm is presented, whose computational complexity is reduced with respect to that of a previously considered approach. This latter approach makes use of the cyclic redundancy check (CRC) of a message as redundancy, in order to correct transmission errors. In this paper, the CRC is also considered as a correction tool, but only a part of it is used for that purpose; the remaining part is only used as an error detection means. This novel approach allows the decoding performance to be adapted to the noise power, and provides a reduction of the computational complexity. Simulation results obtained with and without complexity optimization are presented and compared in the context of the AIS system.
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