Title: A novel spread spectrum underwater acoustic communication system for the inter-symbol interference reduction

Authors: Yan Li; Ning Jia; Jianchun Huang; Biao Liu; Shengming Guo

Addresses: Institute of Acoustics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, China ' Institute of Acoustics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, China ' Institute of Acoustics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, China ' Institute of Acoustics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, China ' Institute of Acoustics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, China

Abstract: A novel spread spectrum Underwater Acoustic (UWA) communication system is proposed to suppress the Inter-Symbol Interference (ISI) caused by the long time-delay spread underwater acoustic multipath channels in this paper. The Interleaved Hybrid Spread Spectrum (IHSS) communication method is combined with M-ary code shift spread spectrum and interleaving method, which has an excellent communication performance when the time-delay spread of the UWA channels is larger than the period of pseudo-noise sequences in the spread spectrum system. The BER performance of the proposed system and the Conventional M-ary Code Shift Spread Spectrum underwater communication system (CMCSSS) is evaluated through computer simulations and the sea trial. The results demonstrate the proposed system can effectively suppress ISI and has a better communication quality.

Keywords: underwater acoustic communication; long time-delay spread; interleaved hybrid spread spectrum.

DOI: 10.1504/IJCAT.2022.129381

International Journal of Computer Applications in Technology, 2022 Vol.69 No.4, pp.357 - 364

Received: 21 Aug 2021
Accepted: 24 Oct 2021
Published online: 07 Mar 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article