M-QAM调制下极化码的构造研究

发布时间：2018-05-07 11:26

  本文选题：二进制输入信道 + M-PAM/M-QAM　； 参考：《电子科技大学学报》2017年02期

【摘要】：研究了当采用最常用的M-QAM调制时极化码构造的问题。在M-QAM调制时无法确定极化码的码元噪声功率,从而导致无法有效地进行信道极化。针对该问题,对M-QAM调制符号中的每个比特进行了研究,得到所有调制符号对应的比特的变化规律,通过这一规律,可以将高阶调制信道分解为多个平行的并具有固定噪声功率的二进制输入子信道,使得极化码在M-QAM调制下的构造问题变为了常规的二进制输入信道下的构造问题,并以此实现了M-QAM调制时极化码的构造。针对常用的格雷映射下的M-PAM/M-QAM调制进行了设计并仿真,仿真结果显示该构造方法能明显地提升性能。
[Abstract]:The problem of constructing polarimetric codes when the most commonly used M-QAM modulation is used is studied. It is impossible to determine the symbol noise power of the polarimetric code during M-QAM modulation, which results in the channel polarization being unable to be effectively carried out. In order to solve this problem, every bit in the M-QAM modulation symbol is studied, and the change law of the bits corresponding to all the modulation symbols is obtained. The higher-order modulation channel can be decomposed into a plurality of parallel binary input subchannels with fixed noise power, so that the construction of polarization codes under M-QAM modulation becomes the construction problem of conventional binary input channels. The polarization code of M-QAM modulation is constructed with this method. The M-PAM/M-QAM modulation based on Gray map is designed and simulated. The simulation results show that the proposed method can improve the performance obviously.
【作者单位】： 电子科技大学通信抗干扰技术国家级重点实验室;
【基金】：国家973项目(2013CB329001) 国家自然科学基金(61371105) 高等学校博士学科点专项科研基金(20110185120025)
【分类号】：TN911.22
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本文编号：1856734