基于Plotkin构造和信息位重休眠的Polar码编码协作

Polar coded cooperation based on Plotkin construction and information bits refreezing

编码协作通过将虚拟MIMO传输和信道编码相结合,在取得分集增益的同时实现了前向纠错,是5G通信中极具应用前景的技术。由于Polar码是目前唯一的理论上可达到香农限传输的信道编码技术,成为编码协作中具体编码技术的优选。为提出衰落信道下高增益的Polar码编码协作方案,从分码字构造方式、性能优化等方面对基于Polar码的编码协作进行了研究,提出了基于Plotkin构造和信息位重休眠的Polar码编码协作方法。仿真结果表明,在慢衰落信道下,所提方法对256码长、0.25码率的Polar码性能有不同程度的提升。

By combining virtual MIMO transmission and channel coding, coded cooperation could do forward error cor-rection and obtain diversity gain simultaneously, making it a good candidate for the key technologies of 5G communica-tion. As the only channel coding technology theoretically achieving Shannon limit, Polar codes become the wonderful option of specific coding technology for coded cooperation. In order to propose Polar coded cooperation method with high performance gain in fading channel, comprehensive studies were carried out from two perspectives： codeword con-struction and performance optimization. Specifically, Polar coded cooperation based on Plotkin construction and infor-mation bits refreezing was proposed. Simulation results show that in slow fading channels, the proposed method signifi-cantly outperforms the original Polar code with 256 code length and 0.25 code rate.