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工程科学与技术:2008,40(5):177-180
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TPC码纠错能力分析及一种改进的迭代译码算法
(1.中国民航飞行学院科研基地;2.国防科学技术大学 电子科学与工程学院, 湖南 长沙 410073)
The Correcting Capacity of TPC and An Improved Iterative Decoding Algorithm
(1.CAFUC Scientific Research Base of Civil Aviation Flight Technology and Safety,Sichuan Guanhan;2.School of Electronic Sci. and Eng., National Univ. of Defense Technol.,Changsha 410073,China)
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投稿时间:2008-03-24    修订日期:2008-07-11
中文摘要: 针对Turbo乘积码实际纠错能力与理论纠错能力的差距,在对Turbo乘积码的编码构造方法的研究基础上,推导证明了Turbo乘积码的理论纠错能力、实际能达到的纠错能力,得出了若分量码纠错能力均为t,则TPC纠错能力为(t+1)2+t的结论;提出了一种可串接在常规算法之后的改进的译码算法,可对常规算法可以检测但无法纠错的情况进行处理。仿真结果表明,在信噪比较低的情况下,本文译码算法可进一步提高译码性能。
Abstract:Contraposing the distance between the theoretic correcting capacity and the actual correcting capacity of TPC, on the base of studying the encoding and constructing methods of the TPC, this paper analysed the theoretic correcting capacity and the actual correcting capacity of TPC,and indicated that if the two component codes had error-correcting capacity t, the TPC had error-correcting capacity (t+1)2+t. An improved iterative decoding algorithm which could be used after usual decoding algorithms to improve the decoding performance was brought forward,and it can correct some errors which usual decoding algorithms could detect but could not correct. The simulation result showed that the improved iterative decoding algorithm could lower the BER, especially when the SNR was low.
文章编号:200800063     中图分类号:    文献标志码:
基金项目:国家自然科学基金
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引用文本:
傅强,王建辉.TPC码纠错能力分析及一种改进的迭代译码算法[J].工程科学与技术,2008,40(5):177-180.
Fu Qiang,王建辉.The Correcting Capacity of TPC and An Improved Iterative Decoding Algorithm[J].Advanced Engineering Sciences,2008,40(5):177-180.