Title: Parametric array differential Pattern time delay shift coding underwater acoustic communication in the under-ice environment

Author: YIN Jingwei; ZHANG Xiao; ZHU Guangping; TANG Shengyu; SUN Hui

Affiliation: 1. Acoustic Science and Technology Laboratory, Harbin Engineering University; 2. College of Underwater Acoustic Engineering, Harbin Engineering University

Abstract: In order to meet the demands of underwater acoustic communication in under ice environment, a differential Pattern time delay shift coding underwater acoustic communication method based on parametric array is introduced in this paper. The under ice underwater acoustic channel is characterized by heavy multipath transmission. Under this model, a parametric array emission method of Pattern signal is derived and the system performance is analyzed. A broadband low frequency sound waves with narrow beam-pattern, which will reduce the interface reflections and suppress the effects of multipath transmission, can be obtained by the emission method. The SongHua River under ice trial results show that there is an anti-multipath property and a higher data rate in the under-ice acoustic channel in proposed approach.