浅海声信道文本信息传输研究

论文首先介绍浅海声信道声传输的基本特性,指出在此类信道中进行多媒体信息传输的特殊困难.随后论述了文本信息传输所具有的抗噪声、抗起伏等优良性能,较能适应于水声信道的复杂性和多变性,但属于较高速率的文本信息传输,多途干扰仍然是文本信息正确检测的根本障碍.文中分析了频率跳变技术克服时域扩散较短的浅海多途的可行性和需解决的关键技术.海上获得的初步实验结果说明了文本信息传输所具有的优越性,值得今后继续深入的研究.

A research on the text data transferring in underwater acoustic channel

According to basic characteristics of the underwater acoustic channel, we can see the typical difficulties in transferring multimedia information through such channels, especially in shallow water. But still the text format information transferring has many advantages in such condition, like the excellent performance of noise-immune, and it is adaptable for complexity and flexibility of underwater acoustic channel. Even though, the multi-path interference still remains an ultimate holdback of correctly detecting of high speed text information. This paper analyzes the feasibility of using the frequency-hopping technique to overcome the short temporal spread, which is caused by the multi-path interference in the shallow water and the key techniques we need to further improve. The preliminary results of on-spot experiments proved the advantages of text format information transferring in underwater acoustic channel which is expecting our further research.