拉普拉斯白噪声下的分组Turbo码
收稿日期: 2015-11-26
修回日期: 2016-02-21
网络出版日期: 2016-03-01
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
Received date: 2015-11-26
Revised date: 2016-02-21
Online 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
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。
党小宇 , 黄准 , 朱鲁军 , 虞湘宾 , 陈小敏 . 拉普拉斯白噪声下的分组Turbo码[J]. 航空学报, 2016 , 37(11) : 3494 -3501 . DOI: 10.7527/S1000-6893.2016.0050
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.
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