喷泉码不等错误保护的策略研究
首发时间:2009-11-20
摘要:数字喷泉码是针对大规模数据分发和可靠广播的应用特点而提出的一种新的信道编码方案,近年来成为了专家学者们的研究热点。在某些多媒体应用中,要求喷泉码具备不等错误保护(UEP)的传输策略。本文以喷泉码中的LT码为例,对喷泉码不等错误保护的实现方案做了分析与研究,提出了相应的改进方法,并进行了仿真比较。仿真结果表明,当接收端收到较少的编码符号时,改进的UEP实现方法比原有的方案表现出了更好的性能。
关键词: 数字喷泉码 不等差错保护(UEP) LT码 BP译码算法
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A Study of Fountain Code for Unequal Error Protection Strategy
Abstract:Digital Fountain code is proposed as a new channel coding scheme for the application characteristics of large scale data distribution and reliable broadcasting, and it becomes a research hotspot to experts and scholars in recent years. In some multimedia applications, it raises a need for fountain code with unequal error protection (UEP) transmission strategy. Using LT code as an example, this paper provides analysis and research for implementation of unequal error protection fountain code, proposes a improved method. The simulation results show that the improved method of UEP achieves better performance than the original method when the receiver gets few coding symbols.
Keywords: Digital Fountain Code UEP LT Code BP Decoding Algorithm
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No.3687450217512586****
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