This paper propose one method of constructing direct spreading sequences based on one -dimensional chaotic maps with infinite collapse.

提出了一种基于一维无限折叠混沌映射的直接扩谱序列构造方法。

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By taking advantage of the characters of dyadic theory, a new method for constructing families of perfect periodic complementary binary sequences pairs (PCSPF) is proposed.

文中利用并元变换的不进位性质，给出了一种构造最佳周期互补二元序列偶族的新方法。

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It is pointed out that the design of sequences of degree distribution in bipartite graphs is one of the most important problems in constructing low-density erasure codes.

其中二部图度序列的设计是构造低密度纠删码的最关键问题之一。

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