纠错编码技术在水声跳频通信中的性能研究

A study of the performance of error correction coding underwater acoustic frequency-hopping communication system

将水声跳频通信系统与纠错编码技术相结合进行了研究,针对复杂多变、强多途和起伏干扰的浅水水声信道,建立了基于BELLHOP射线模型的时变衰落水声信道模型,该信道模型建立起了信道特性与海洋环境参数之间的关系,在海洋环境参数给定的条件下可以精确仿真信道。在此基础上通过系统仿真的方法研究了卷积码、RS码和串行级联码三种纠错编码方案在水声跳频通信系统中的性能,给出了两种典型信道下的仿真结果并进行了对比分析,结果表明串行级联码具有更强的纠错能力,比较适合复杂多变的水声衰落信道。

Underwater acoustic frequency-hopping communication with error correction coding（ECC） is studied.In order to simulate the complex time variant multi-path and fluctuation of shallow water acoustic communication channels,a time-variant multi-path fading channel model based on BELLHOP ray model is established,which gives the relationship between the ocean environment parameters and the channel characteristics,and the channel can be accurately simulated when the ocean environment parameters are known.Three ECC schemes： convolutional code,RS code and serial concatenated code are proposed.The performance of the ECC schemes in underwater acoustic frequency-hopping communication system is analyzed by simulation,and the results under two typical shallow water acoustic channels are given and compared,which demonstrate that the serial concatenated code has more powerful error correction capability than the two other code schemes and is rather suitable for the complex time-variant fading underwater acoustic channel.