發(fā)布時間：2018-05-07 11:26

  本文選題：二進制輸入信道 + M-PAM/M-QAM��； 參考：《電子科技大學(xué)學(xué)報》2017年02期

【摘要】：研究了當(dāng)采用最常用的M-QAM調(diào)制時極化碼構(gòu)造的問題。在M-QAM調(diào)制時無法確定極化碼的碼元噪聲功率,從而導(dǎo)致無法有效地進行信道極化。針對該問題,對M-QAM調(diào)制符號中的每個比特進行了研究,得到所有調(diào)制符號對應(yīng)的比特的變化規(guī)律,通過這一規(guī)律,可以將高階調(diào)制信道分解為多個平行的并具有固定噪聲功率的二進制輸入子信道,使得極化碼在M-QAM調(diào)制下的構(gòu)造問題變?yōu)榱顺Ｒ?guī)的二進制輸入信道下的構(gòu)造問題,并以此實現(xiàn)了M-QAM調(diào)制時極化碼的構(gòu)造。針對常用的格雷映射下的M-PAM/M-QAM調(diào)制進行了設(shè)計并仿真,仿真結(jié)果顯示該構(gòu)造方法能明顯地提升性能。
[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.
【作者單位】： 電子科技大學(xué)通信抗干擾技術(shù)國家級重點實驗室;
【基金】：國家973項目(2013CB329001) 國家自然科學(xué)基金(61371105) 高等學(xué)校博士學(xué)科點專項科研基金(20110185120025)
【分類號】：TN911.22
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本文編號：1856734