| Fountain码译码的改进方法 |
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| 引用本文： | 张冀,高宏峰,师春灵. Fountain码译码的改进方法[J]. 通信技术, 2011, 44(6): 54-56 |
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| 作者姓名： | 张冀 高宏峰 师春灵 |
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| 作者单位： | 1. 河南科技大学数学与统计学院,河南洛阳,471003
2. 河南科技大学电子信息工程学院,河南洛阳,471003 |
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| 摘 要： | Fountain码的无速率特性使得它可以在信道删除率未知的删除信道下高效传输信息。但是由于传统的Fountain码（主要是LT码和Raptor码）在译码过程中未对差异信息进行处理,丢失了部分可以被译出的信息,从而增加了译码代价。针对传统Fountain码这方面的缺点,提出一种利用消除度数为2的校验单元来处理差异信息的Fountain码译码的改进方法。仿真结果验证,采用该方法不但保证了Fountain码的无速率特性,而且提高了信息利用率和译码效率。
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| 关 键 词： | Fountain码 差异信息 校验单元 |
Improvement of Fountain-code Decoding |
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| ZHANG JI,GAO Hong-feng,SHI Chun-ling. Improvement of Fountain-code Decoding[J]. Communications Technology, 2011, 44(6): 54-56 |
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| Authors: | ZHANG JI GAO Hong-feng SHI Chun-ling |
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| Affiliation: | ZHANG JIa,GAO Hong-fengb,SHI Chun-lingb(a.Mathematics and Statistics College,b.Electronic & Information Engineering College,Henan University of Science and Technology,Luoyang Henan 471003,China) |
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| Abstract: | Fountain code,due to its rateless properties,could effectively transfer information over erasure channel with unknown erasure rates.However,traditional Fountain code(principally LT code and Raptor code)implements no processing on the discrepant information in the decoding process,thus resulting in certain loss of useful information.This paper describes a new decoding methods for Fountain code,which processes the discrepant information by eliminating the check symbol with a degree of 2.Simulation results sho... |
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| Keywords: | Fountain code discrepant information check symbol |
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