级联编码在地空数据链信道编码中的应用研究

为了克服传统信道编码方式的缺点,提高地空数据链信道传输的可靠性和传输效率,同时降低信道编码的复杂度,采用了级联编码的方法,将重复累加码与喷泉码进行级联后,应用到地空通信数据链信道编码当中。首先阐述了重复累加码、喷泉码的基本原理和编解码方法,重点介绍了两种码的级联方法,并通过实验进行了论证和比较,实验证明,通过级联方式编码后,数据链信道的误帧率明显降低,通信效果得到明显改善。研究结果表明,级联编码方法不仅能充分发挥喷泉码的特点,而且无线数据传输的可靠性得到明显改善。

Channel Coding of Data Link Based on Concatenated Coding

In order to overcome the traditional shortcomings of the channel coding and improve the transmission reliability and efficiency of ground-air data link channel while reducing the complexity of channel codingthe method of concatenate encoding was applied in the ground-air data link channel coding.Firstthe basic principles and methods of encoding and decoding for the repeat accumulate codes and fountain codes were described.Thenthe concatenating methods for two kinds of code were introducedwhich were demonstrated by experiments.The experiments showed thatthrough the concatenated encodingthe frame error rate of data link channel was reduced significantlyand the communication effect was improved greatly.The result of study shows that the concatenate encoding method can not only give full play to the characteristics of fountain codesbut also improve the reliability of wireless data transmission significantly.