A packet level FEC code for deep space communications

Zhidong Xie, Gengxin Zhang, Hongpeng Zhu, Dongming Bian, Yong Jiang, Jing Hu
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引用次数: 2

Abstract

In space communications, some information is more important than others so that it necessitates a unequal error protection (UEP) to provide priority encoding transmission in limited channel capacity. Expanding Window Fountain (EWF) codes is a promising packet level FEC scheme for UEP. However, due to inherit from Fountain codes, its performance becomes very poor when source block size is small. In this work, we propose a novel framework to improve EWF based on the ideal that virtually increase the size of the source block by duplicating the information packets. Extending original packets virtually increase the block size, leading to distinct performance improvement in view of packet erasure rate (PER) with slight increase in complexity.
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深空通信的包级FEC代码
在空间通信中,有些信息比其他信息更重要,因此需要不等错误保护(UEP)来在有限信道容量下提供优先编码传输。扩展窗口喷泉(EWF)码是一种很有前途的分组级FEC方案。但是,由于继承了Fountain代码,在源块较小的情况下,其性能会变得很差。在这项工作中,我们提出了一个新的框架来改进EWF,该框架基于通过复制信息包实际上增加源块大小的理想。扩展原始数据包实际上增加了块大小,在数据包擦除率(PER)方面有明显的性能提高,但复杂性略有增加。
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