一类新型准同步CDMA系统扩频序列

基于广义Chirp—like序列族，用序列乘积的方法，构造了一类新型扩频序列族，并讨论了它的相关特性．研究结果表明：该序列族存在一类具有零相关区的子序列族，适用于准同步CDMA通信系统；当取广义Chrip-like序列中调制的复数为复数单位根时，要构造的复数扩频序列只需通过简单的整数求和及模运算就能生成．

New Class of Spreading Sequences for Quasi-synchronous CDMA Systems

Based on the generalized Chirp-like sequences, a new class of spreading sequences was constructed with the help of the product technique and its correlation properties were discussed. The research results show that among the proposed sequences, there is a subclass of sequences with zero correlation zone which can be used in quasi-synchronous CDMA systems; a complex spreading sequence can be constructed only through complex number summing and module operating when the complex number generated in the generalized Chirp-like sequences is taken as a complex unit root.