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首页> 外文期刊>IEEE Transactions on Information Theory >Zero-Error Source–Channel Coding With Side Information
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Zero-Error Source–Channel Coding With Side Information

机译:带有辅助信息的零误差源-信道编码

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摘要

This correspondence presents a novel application of the theta function defined by LovÁsz. The problem of coding for transmission of a source through a channel without error when the receiver has side information about the source is analyzed. Using properties of the LovÁsz theta function, it is shown that separate source and channel coding is asymptotically suboptimal in general. By contrast, in the case of vanishingly small probability of error, separate source and channel coding is known to be asymptotically optimal. For the zero-error case, it is further shown that the joint coding gain can in fact be unbounded. Since separate coding simplifies code design and use, conditions on sources and channels for the optimality of separate coding are also derived.
机译:这种对应关系代表了LovÁsz定义的theta函数的新颖应用。分析了当接收器具有关于源的辅助信息时通过信道传输源而没有错误的编码问题。利用LovÁsztheta函数的性质,可以看出,单独的源和通道编码通常在渐近性上不是最佳的。相比之下,在错误概率逐渐减小的情况下,已知单独的源和通道编码是渐近最优的。对于零误差情况,进一步表明联合编码增益实际上可以是无界的。由于单独的编码简化了代码的设计和使用,因此,还得出了单独编码的最优性的源和信道条件。

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