Gamma-Gamma信道下基于并行交织极化码的误码性能研究  

Research on error performance of parallel interleavedpolar codes in Gamma-Gamma channels

作　　者：蒋青芳 姚海峰 刘智[3] 刘树通 王宏利 郭昱佑 JIANG Qingfang;YAO Haifeng;LIU Zhi;LIU Shutong;WANG Hongli;GUO Yuyoug(School of Electronic Information Engineering,Changchun University of Science and Technology,Changchun 130022,P.R.China;School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,P.R.China;National-Local Joint Engineering Research Center of Space Optoelectronic Technology,Changchun University of Science and Technology,Changchun 130022,P.R.China)

机构地区：[1]长春理工大学电子信息工程学院,长春130022 [2]北京理工大学光电学院,北京100081 [3]长春理工大学空间光电技术国家地方联合工程研究中心,长春130022

出　　处：《重庆邮电大学学报（自然科学版）》2024年第1期145-152,共8页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金叶企孙科学基金项目(U2141231);中国博士后科学基金项目(2021TQ0035,2021M700415);应用光学国家重点实验室开放基金项目(SKLA02022001A11)~~。

摘　　要：为了降低大气湍流引起的衰落影响,同时减少长片误码干扰,提出一种基于并行交织极化码(polar code)的编码方法。通过蒙特卡洛模拟Gamma-Gamma分布的随机数构建大气湍流信道,以成对差错概率(pairwise error probability, PEP)和极化谱确定极化信道的误差概率上限,采用乘积距离准则最小化差错概率,建立了并行交织的设计准则。对极化码在湍流信道中的误码率(bit error rate, BER)性能进行了评估,仿真结果表明,基于极化码的并行交织方法获得了一个量级的误码性能提升,在信噪比为5 dB时,误码率从5.11×10-6降低为2.13×10-7,有效缓解了湍流引起的长片误码问题。实验验证了所提准则的可靠性和适用性。This paper proposes a coding method based on parallel interleaved polar codes to mitigate the impact of fading caused by atmospheric turbulence and reduce the bit error interference of long slices.The method constructs an atmospheric turbulence channel using Monte Carlo simulation of Gamma-Gamma distributed random numbers,and determines the upper limit of the error probability of the polarized channel using pairwise error probability(PEP)and polarization spectrum.The method minimizes the error probability using the product distance criterion and establishes design criteria for parallel interleaving.The bit error rate(BER)performance of polar codes in turbulent channels is evaluated.Simulation results show that the parallel interleaving method based on polar codes has achieved an order of magnitude improvement in bit error performance.When the signal-to-noise ratio is 5 dB,the bit error rate is reduced from 5.11×10-6 to 2.13×10-7,effectively alleviating the long-slice bit error caused by turbulence.The reliability and applicability of the simulation results are verified through experiments.

关 键 词：Gamma-Gamma信道 极化码 并行交织 成对差错概率 

分 类 号：TN929[电子电信—通信与信息系统]