Performance Simulation of Underwater Acoustic Spread Spectrum Communication Based on LDPC Code

Autor:	Jin Chen, Xiao Fei Wei
Rok vydání:	2021
Předmět:	Spread spectrum History Thesaurus (information retrieval) Computer engineering Computer science Underwater Low-density parity-check code Computer Science::Information Theory Computer Science Applications Education
Zdroj:	Journal of Physics: Conference Series. 1873:012018
ISSN:	1742-6596 1742-6588
Popis:	As we all know, the underwater acoustic channel is a time-varying, space-changing, and frequency-varying fading channel with limited bandwidth and severe noise interference. This paper studies and analyzes the main factors restricting the transmission of underwater acoustic channels, and establishes an underwater acoustic multipath time-varying fading channel. The channel coding adopts Quasi-Cyslic Low-Density Parity-Check Codes (QC-LDPC), combined with spread spectrum technology and high-order modulation technology, and utilizes Log-likelihood Ratios Belief Propagation (LLR-BP) is decoded, the simulation results show that LDPC codes have stronger error correction capabilities in underwater acoustic spread spectrum communication systems, ensuring that the system can operate reliably under low SNR conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4c331b47ee573222d7d9bf35bf8cd95f https://doi.org/10.1088/1742-6596/1873/1/012018 Zobrazit plný text záznamu