Design of a direction finder based on the output of parallel hydroacoustic surveillance system

The problem of synthesizing a direction finding algorithm based on a sample composed of the output signals of a limited number of channels of a scanning sonar system is considered. The problem is formulated as a search for the maximum of the likelihood function by its lattice representation. Options for using the optimal and quadratic interpolation are considered. The errors of displacement and loss of potential accuracy are estimated depending on sample dimension, angular step of scanning, and on the amount of the target movement within the measurement interval. The advantage of the proposed approach is shown in terms of its potential accuracy compared to the traditional approach to constructing direction finding paths based on Guanella’s technique.