航空学报 > 2016, Vol. 37 Issue (11): 3494-3501   doi: 10.7527/S1000-6893.2016.0050

拉普拉斯白噪声下的分组Turbo码

党小宇, 黄准, 朱鲁军, 虞湘宾, 陈小敏   

  1. 南京航空航天大学 电子信息工程学院, 南京 210016
  • 收稿日期:2015-11-26 修回日期:2016-02-21 出版日期:2016-11-15 发布日期:2016-03-01
  • 通讯作者: 党小宇,男,博士,教授,硕士生导师。主要研究方向:卫星导航、信道编码理论、深空通信、航空航天测控。Tel.:025-84892402,E-mail:dang@nuaa.edu.cn E-mail:dang@nuaa.edu.cn
  • 作者简介:党小宇,男,博士,教授,硕士生导师。主要研究方向:卫星导航、信道编码理论、深空通信、航空航天测控。Tel.:025-84892402,E-mail:dang@nuaa.edu.cn;黄准,男,硕士研究生。主要研究方向:信道编码理论、调制解调技术。E-mail:2702121416@qq.com;朱鲁军,男,硕士研究生。主要研究方向:调制解调技术、计算机网络。E-mail:zhulujuna@163.com
  • 基金资助:

    国家自然科学基金(61172078、61571224、61571225);中央高校基本科研业务费(NS2014038);南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20150404);教育部留学回国人员科研启动基金;江苏省六大人才高峰项目

Block Turbo code in white Laplacian noise

DANG Xiaoyu, HUANG Zhun, ZHU Lujun, YU Xiangbin, CHEN Xiaomin   

  1. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2015-11-26 Revised:2016-02-21 Online:2016-11-15 Published:2016-03-01
  • Supported by:

    National Natural Science Foundation of China (61172078, 61571224, 61571225); Fundamental Research Funds for the Central Universities (NS2014038); Foundation of Graduate Innovation Center in NUAA (kfjj20150404); Scientific Research Foundation for the Returned Overseas Chinese Scholars of Ministry of Education of China; Six Talent Peaks Project in Jiangsu

摘要:

目前,传统航空测控通信所采用的纠错码大多是建立在高斯信道基础上的。然而,航空测控环境中不可避免存在着多种尖锐的噪声,测控通信纠错码的可靠性能在非高斯信道中尚未得到充分的研究。分析了一类国际航空遥测的分组Turbo码(BTC)在拉普拉斯白噪声信道下的译码和性能。将传统Chase迭代译码算法引入到拉普拉斯白噪声信道中,建立相应的数学模型,同时,基于该数学模型设计了3种不同的译码接收器下的BTC译码方案。仿真结果验证了该数学模型的正确性与可行性,在误码率为10-4时最佳译码方案相比于硬限幅接收机有3.7 dB的增益,相比原有的高斯信道下的接收机仅有0.6 dB的性能损失。

关键词: 分组Turbo码, 拉普拉斯白噪声, 误码率(BER), 码字可靠性, 迭代译码算法

Abstract:

Recently, most error correcting codes used in aeronautical telemetry and control communication are based on white Gaussian channel. However, there are unavoidably multiple kinds of sharp noises in aeronautical measurement and control communication, and reliability of error correcting codes with non-Gaussian channel has not been fully studied. In this paper, the decoding and performance of the block Turbo code in white Laplacian channel is analyzed. The mathematical model is established by introducing conventional Chase iterative decoding algorithm to white Laplacian channel. At the same time, three kinds of BTC decoding schemes with different detectors are proposed. Simulation results verify the availability of the model. It is found that when the bit error rate is 10-4, the optimal detector provides 3.7 dB of gain compared with the hard limit detector in white Laplacian channel, and only 0.6 dB of performance loss in contrast with the traditional detector in white Gaussian channel.

Key words: block Turbo code, white Laplacian noise, bit error rate (BER), code reliability, iterative decoding algorithm

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