一类新型智能码序列的相关函数研究

The Correlation Functions of New Smart Codes

智能码的生成方法和特性研究是当前移动通信中重点研究的关键技术之一。文中介绍一类特殊的智能码———桥函数序列。给出桥函数序列的几种特殊生成方式。研究桥函数序列的自相关和互相关函数特性,得到一类具有零自相关窗的桥函数序列和一类互相关函数恒为零的桥函数序列族。最后给出q=8和k=2时对应的一类智能码———桥函数序列族,它由64个不同的长度均为256的离散桥函数序列组成。这类桥函数序列族可望在移动通信CDMA中得到应用。

Smart code generation methods and its characteristics are among the key technologies of current mobile communication research.A kind of special smart code——the Bridge Function sequence are introduced in this paper.First,several special generation metbods of the Bridge Function sequence are given,and then the auto-correlation function and cross correlation function of the Bridge Function sequences are studied,wherein we find a kind of Bridge Function sequence having zero correlation window and a kind of Bridge Function sequence whose auto-correlation function value is always zero.At the end.a kind of Bridge Function sequence according to q=8,k=2 is given.It is made up of 64 different discrete Bridge Function sequences whose lengths are all 256.This kind of Bridge Function sequence is expecting to be applied in mobile CDMA communications.