CDMA系统中的扩频序列及其软件实现

扩频序列的构造和设计是CDMA系统与扩频通信系统中的关键技术之一。目前的许多扩频序列研究成果都是使用有限域上的迹函数来给出，这对工程应用十分不便。文章首先总结了目前国内外在扩频序列研究领域所取得的重要成果；然后重点讨论了有限域上的运算及迹函数的软件实现，并以此为基础研究了GMW序列和No序列的软件实现；最后总结了Gold序列、Kasami序列、Bent序列、交织序列和作者提出的一类序列的研究成果与实现的有关文献。

SPREADING CODES IN CDMA SYSTEMS AND THEIR SOFTWARE IMPLEMENTATION

The construction of spreading codes is a key technique for CDMA and SS systems. Many research results of spreading codes are presented by trace function on Galois fields and thus not convenient for engineering applications. This paper summarizes the main results of exiting sequence types and discusses the arithmetic operations on Galois fields and software realization, based on which the implementation of GMW and No sequences is also described. Gold,Kasami,Bent,interleaved sequences and the sequence type recently presented by the author as well as the literatures of realization methods are briefly discussed finally.