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首页> 外文期刊>IEEE transactions on wireless communications >Adaptive Capacity-Achieving Channel Coding for Fountain-Coded Multicast Transmission in Packet Radio Systems
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Adaptive Capacity-Achieving Channel Coding for Fountain-Coded Multicast Transmission in Packet Radio Systems

机译：分组无线系统中用于喷泉编码多播传输的自适应容量实现信道编码

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摘要

For time-varying fading, adaptation of the physical-layer channel code greatly enhances the throughput of a multicast transmission system, even if the system employs an application-layer fountain code for packet erasure correction. Performance evaluations for adaptive channel-coding protocols typically require extensive simulations of the fading channel, the iterative decoding process, and the generation of the control information that is used for the adaptation of the channel code. We present a method for the evaluation of such protocols that avoids a substantial amount of the computation required by traditional simulations, and we demonstrate that some important performance measures can be evaluated entirely by analysis. By the use of capacity-achieving channel codes in our investigation, we also decouple the performance of the adaptive coding protocol from the performance of a particular type of channel code and decoding method, which facilitates comparisons among different protocols. The application of our methods is demonstrated for two adaptive channel-coding protocols that are candidates for fountain-coded multicast transmission in packet radio systems.
机译：对于随时间变化的衰落，即使系统使用应用层源代码进行分组擦除校正，对物理层信道代码的适应也可以大大提高多播传输系统的吞吐量。自适应信道编码协议的性能评估通常需要对衰落信道，迭代解码过程以及用于信道码自适应的控制信息进行广泛的仿真。我们提出了一种评估此类协议的方法，该方法避免了传统仿真所需要的大量计算，并且我们证明了一些重要的性能指标可以通过分析完全评估。通过在我们的研究中使用可实现容量的信道代码，我们还将自适应编码协议的性能与特定类型的信道代码和解码方法的性能分离开来，这有利于不同协议之间的比较。我们的方法的应用针对两种自适应信道编码协议进行了演示，这两种协议是分组无线系统中喷泉编码的多播传输的候选者。

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