joint coding of underwater acoustic communication source channel based on polar code
Chunyan Zhou, Hao Cao, Qiyun Li · 2022
It is difficult to improve underwater acoustic communication due to the long delay extension of underwater acoustic channel and serious selective fading in frequency domain. At the same time, there is residual redundancy in the actual source of underwater acoustic communication, which is difficult to be utilized by traditional methods, resulting in a certain broadband waste. In order to improve the reliability of underwater acoustic communication, a joint coding method based on Polar code is proposed in this paper. According to the characteristics of source coding and channel coding, this method uses redundancy in source coding to resist channel errors. In addition, the unequal error protection mechanism is added, which can improve transmission efficiency by adopting the code with good error correction ability for important code streams and adopting the code with poor error correction ability or not for non-important code streams according to the different importance of the output code streams of the source. In this way, a joint encoder responsible for both source compression and channel error protection is realized.