Using multilevel complementary sets of sequences for acoustic signals emission in underwater links

Complementary Set of Sequences (CSS) are being widely used in communications due to the ideal correlation properties and the availability of efficient correlators that significantly reduce the number of computations in the detection process. In this paper, the performance of the acoustic signals encoded by multilevel CSS in an underwater horizontal link is analysed. For that, a channel propagation model based on ray tracing is used, where parameters for the San Jorge Gulf Argentina are included. The main goal of this is to analyse the transmission scheme based on acoustic encoded signals, in order to be used in a communication system, between a buoy in a surface and a group of sensors on the seabed, that form a sensor network for coastal monitoring. Other application of this scheme can be a positioning system, where a set of sensors of the network are deployed on the seabed in order to compute its position. The obtained results show a suitable robustness of the used encoding scheme based on Multilevel Complementary Sets of Sequences in a point-to-point link in shallow water, where it is possible to detect encoded signals even under hard conditions of attenuation and SNR.