极化码在LTE系统中的应用

Application of polar code in LTE system

为了实现极化码在LTE系统中的应用,提出了两类LTE系统中的极化码编码调制方案:联合极化编码调制(MLC-PCM)方案和比特交织极化编码调制(BIPCM)方案。其中,MLC-PCM方案凸显了通信系统中联合极化设计对系统性能提升的重要作用。此外,由于极化码的编码码长不一定为2的幂次,因此提出了一套简单易行且性能优异的极化码速率适配打孔方案,使得极化码的码长可以任意变化。最后,将极化编码调制方案与LTE系统Turbo码编码调制方案在所有MCS等级上进行了对比,仿真结果显示,在所有MCS等级上,极化编码调制方案都有明显性能增益。

In order to implement the application of polar code in LTE system, two kinds of coding modulation schemes under LTE radio link were proposed, which were multilevel coding polar coded modulation（MLC-PCM） scheme and bit interleave polar coding modulation（BIPCM） scheme. MLC-PCM scheme highlights that multilevel polarization design is significant to the promotion of system performance in communication system. Furthermore, the length of polar code may not be the power of 2 for different business requirement, so a rate match scheme that was easy to implement and well property for polar codes was proposed, to make the length of polar codes change arbitrarily. Finally, compared with the Turbo code modulation scheme in LTE system on all the MCS level, polar code modulation can have a obvious gain.