“太极混一”——极化码原理及5G应用

发布时间:2019-03-15  作者:牛凯  阅读量:


[摘要] 极化码是第一种达到信道容量的构造性编码,已列入5G移动通信的控制信道编码标准,这是信道编码领域近年来的重大突破。旨在阐述极化码的基本原理与5G中的应用。基于信道极化观点,分析了极化码蝶形编码结构与基本的串行抵消译码算法,提出了级联极化编码结构,并归纳了高性能译码算法的特点。进一步,深入分析了5G移动通信中极化码设计的基本思想,概括了极化码实用编码的3种方式:凿孔、缩短与重复。最后,指出极化信息处理是未来通信系统优化的新型方法。

[关键词] 极化码;信道极化;串行抵消译码;串行抵消列表译码;串行抵消堆栈译码;极化信息处理

[Abstract] Polar code is the first error control code achieving the channel capacity and has been accepted as the coding scheme of the control channels of the 5G wireless communication systems, which is the great breakthrough of the channel coding field in recent years. In this paper, the primary principle of the polar code and the application in 5G systems are surveyed. First, based on the viewpoint of channel polarization, the butter-fly structure of polar coding and successive cancellation decoding are analyzed. Then, the concatenated polar code is proposed and the characteristics of high-performance decoding algorithms are summarized. Furthermore, the design of polar codes in 5G systems is addressed and three practical coding schemes of polar codes are overviewed, which is puncturing, shortening and repetition. In the end, it is pointed out that polar coded information processing will become the new diagram of the communication system optimization in the future.

[Keywords] polar code; channel polarization; successive cancellation decoding; successive cancellation list decoding; successive cancellation stack decoding; polar coded information processing

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