A tracking method based on particle filter for multistatic sonar system

For a multistatic active sonar system, a modified weight tracking method based on particle filter was provided in this paper. Multistatic sonar systems usually consist of bistatic detection geometries. The Geometrical Dilution of Precision (GDOP) of each bistatic has its own distribution characteristics. For a hyperbola location algorithm, the contacts near the baseline of the bistatic and the contacts far away from the true trajectory have so large location error that they will severely deteriorate the location precision. In this paper, we proposed a modified tracking method which gives these two types of the contacts low weights according to the distribution of GDOP map before the basic particle filter was used. This improved location method works better with high numbers of false contacts than basic particle filter. Numerical examples were used to demonstrate the effectiveness of this approach. It was proved that the enhanced multistatic sonar tracking performance was achieved.