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Bounds and Constructions of Codes Over Symbol-Pair Read Channels

机译:符号对读取通道上代码的边界和构造

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摘要

Cassuto and Blaum recently studied the symbol-pair channel, a model where every two consecutive symbols are read together. This special channel structure is motivated by the limitations of the reading process in high density data storage systems, where it is no longer possible to read individual symbols. In this new paradigm, the errors are not individual symbol errors, but rather symbol-pair errors, where at least one of the symbols is erroneous. In this work, we study bounds and constructions of codes over the symbol-pair channel. We extend the Johnson bound and the linear programming bound for this channel and show that they improve upon existing bounds. We then propose new code constructions that improve upon existing results for pair-distance six, seven, and ten.
机译:Cassuto和Blaum最近研究了符号对通道,该模型将每两个连续的符号一起读取。这种特殊的通道结构是由高密度数据存储系统中读取过程的限制所驱动的,在该系统中,不再可能读取单个符号。在这种新范例中,错误不是单个符号错误,而是符号对错误,其中至少一个符号是错误的。在这项工作中,我们研究符号对通道上代码的范围和构造。我们扩展了此通道的Johnson边界和线性编程边界,并表明它们在现有边界上有所改进。然后,我们提出新的代码构造,以改进对距离六,七和十的现有结果。

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