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arXiv 0904.0879cs.ITmath.IT
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关于Wyner-Ziv问题的叠加编码

On Superposition Coding for the Wyner-Ziv Problem

Lorenzo Cappellari

摘要:

在具有边信息的有损源/噪声信道编码问题中,使用可以被划分为“好”信道/源代码的“好”源/信道代码来实现理论界限。在先前的工作中概述了在编码器处使用独立的信道和源代码利用边信息在信道编码中实现最优性的方案。在实践中,原来的问题被转化为一个多址接入问题,其中的两个独立的代码的叠加可以使用连续的干扰消除解码。受这项工作的启发,我们分析了在解码器侧边信息的信源编码的叠加方法。我们提出了一个随机编码的分析,显示的Wyner-Ziv界的可扩展性。然后,我们讨论了一些有关的问题,这种方法的实际实施。

英文摘要:

In problems of lossy source/noisy channel coding with side information, the theoretical bounds are achieved using "good" source/channel codes that can be partitioned into "good" channel/source codes. A scheme that achieves optimality in channel coding with side information at the encoder using independent channel and source codes was outlined in previous works. In practice, the original problem is transformed into a multiple-access problem in which the superposition of the two independent codes can be decoded using successive interference cancellation. Inspired by this work, we analyze the superposition approach for source coding with side information at the decoder. We present a random coding analysis that shows achievability of the Wyner-Ziv bound. Then, we discuss some issues related to the practical implementation of this method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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