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arXiv 1202.0309cs.ITmath.IT
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通过用户资源重新排序的协议编码,第II部分:实用编码策略

Protocol Coding through Reordering of User Resources, Part II: Practical Coding Strategies

Petar Popovski, Zoran Utkovski, Kasper F. Trillingsgaard

摘要:

我们使用术语协议编码来表示通信策略,其中信息通过特定通信协议所采取的动作进行编码。在这项工作中,我们调查的策略,通过组合排序的标签用户资源(数据包,通道)在现有的,主要的系统协议编码。这在现有系统中引入了一个新的辅助通信信道,该信道在先前的工作中专门在隐写上下文中被考虑。相反,我们专注于使用辅助信道与新引入的辅助设备进行可靠的通信,这些辅助设备是主设备的低复杂度版本,仅能够解码主信号中的鲁棒编码的报头信息。在第一部分的工作中,我们的特点是通过信息理论分析的能力的二级通道。在本文中,我们考虑实际策略的信息理论分析的启发,协议编码。事实证明,第一部分的见解有助于设计出更好的差错控制码。这一点可以通过将错误性能与“朴素”策略进行比较来证明,该策略可能在不进行第一部分中的分析的情况下可用。这些结果清楚地概述了所讨论的次级通道概念背后的概念新颖性及其实际适用性。

英文摘要:

We use the term protocol coding to denote the communication strategies in which information is encoded through the actions taken by a certain communication protocol. In this work we investigate strategies for protocol coding via combinatorial ordering of the labelled user resources (packets, channels) in an existing, primary system. This introduces a new, secondary communication channel in the existing system, which has been considered in the prior work exclusively in a steganographic context. Instead, we focus on the use of secondary channel for reliable communication with newly introduced secondary devices, that are low-complexity versions of the primary devices, capable only to decode the robustly encoded header information in the primary signals. In Part I of the work we have characterized the capacity of the secondary channel through information-theoretic analysis. In this paper we consider practical strategies for protocol coding inspired by the information-theoretic analysis. It turns out that the insights from Part I are instrumental for devising superior design of error-control codes. This is demonstrated by comparing the error performance to the "na"ıve" strategy which is presumably available without carrying out the analysis in Part I. These results are clearly outlining both the conceptual novelty behind the discussed concept of secondary channel as well as its practical applicability.

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