摘要
针对复杂多变、强多途和起伏干扰的浅海水声信道,建立了基于BELLHOP射线模型的时变衰落水声信道模型。在此基础上通过系统仿真的方法,分析了卷积码、RS码和串行级联码3种纠错编码方案在水声跳频通信系统中的性能,给出了信道下的仿真结果并进行了对比分析;研究了交织器位置对串行级联码纠错性能的影响。结果表明,交织器位于串行级联码编码之后具有更强的纠错能力,适合复杂多变的水声衰落信道。
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. Three ECC schemes： eonvolutional 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. Besides, the performance of the different local interleaves in the serial concatenated code is analyzed by simulation, which demonstrate that when the interleave is behind the serial concatenated code, it has more powerful error correction capability than the others and is suitable for the complex time-variant fading underwater acoustic channel.
出处
《舰船科学技术》
2011年第2期86-90,共5页
Ship Science and Technology
关键词
跳频通信
卷积码
RS码
串行级联码
交织器
frequency-hopping
convolutional code
RS code
serial concatenated code
interleave.
