The general relationship in trellis complexity between two dimensional product codes and its component codes is proved and the trellis design of product codes is analyzed.

证明了二维乘积码与其分量码的网格图复杂度之间的一般关系，并分析了二维乘积码的网格图的设计。

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On the trellis complexity of two-dimensional product codes;

研究了线性等重码的格子复杂度 。

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