CDMA扩频信号的数模混合型解扩方法  

A Mixed Analog-Digital Algorithm of Despreading for CDMA Spread-Signals

作　　者：刘高辉[1] 陈静瑾[1] 余宁梅[1] 高勇[1] 牛兰奇[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《西安理工大学学报》2003年第4期326-330,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(60276017)

摘　　要：提出一种CDMA扩频信号的数模混合型解扩方法。该方法首先采用二阶采样实现中频信号的正交解调,再用数字控制的并行模拟运算电路实现的模拟匹配滤波器对基带信号进行相关解扩。仿真实验表明,该方法能实现CDMA扩频信号的相关解扩,而且实现电路结构简单,是一种有效的相关解扩技术。In this paper, a new mixed analog-digital algorithm of despreading for CDMA signals is described. First, the IF signal is directly sampled and held with the second order sampling method to implement the quadrature demodulation, and then is despread by matched filters implemented by digital-controlled analog parallel operational circuits. Simulation experiment results show that this method can realize not only the efficient correlation dispreading of CDMA spread-signals, but also the simplification of circuit structure. Accordingly, it is a kind of effective correlation despreading technique.

关 键 词：CDMA扩频信号 数模混合型解扩方法 二阶采样 匹配滤波器 

分 类 号：TN914.53[电子电信—通信与信息系统]