A novel bit mapping scheme for high-order polar coded modulation systems  

作　　者：LI Zhiwei YUAN Jianguo ZHANG Rui HUANG Sheng 李志伟;袁建国;张瑞;黄胜(Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology of Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology of Chongqing University of Posts and Telecommunications,Chongqing 400065,China

出　　处：《Optoelectronics Letters》2021年第11期683-687,共5页光电子快报（英文版）

基　　金：supported by the National High Technology and Development Program of China (No.61971079);the Postgraduate Science Research Innovation project of Chongqing Municipal Education Commission (No.CYS20266)。

摘　　要：In order to improve the spectrum efficiency of the high-order polar coded modulation systems, the polar code is used as the component code of the bit-interleave coded modulation(BICM) system, a novel bit mapping scheme is proposed considering of the channel polarization and successive cancellation(SC) decoding principle of polar codes as well as the unequal protection of equivalent channels by modulator. In this scheme, the frozen bits on the unreliable split channel are allocated to the equivalent channel with the low protection of the modulator, while the equivalent channels with the high protection are used to transmit the information bits. Thus, the error-correcting performance of polar codes is improved. Compared with some bit mapping schemes, the proposed bit mapping scheme only needs to divide and choose the parameters of the split channels reliability measurement, the complexity does not increase obviously, and simulation results show that the proposed scheme has the better performance under the quadrature amplitude modulation(QAM) modulation based on the Gray mapping.

关 键 词：A novel bit mapping scheme for high-order polar coded modulation systems 

分 类 号：TN911.3[电子电信—通信与信息系统]