提高DSSS信号PN码相位测量精度的三点二次插值法  

Improving DSSS signal PN code phase measurement precision by 3-points quadratic interpolation

作　　者：龚国辉[1] 李思昆[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《通信学报》2007年第2期130-133,共4页Journal on Communications

基　　金：国家自然科学基金资助项目(90207019);国家高技术研究发展计划("863"计划)基金资助项目(2002AA1Z1480)~~

摘　　要：提出了利用三点二次插值法处理相关谱谱峰数据以提高DSSS(直序扩频)信号PN码相位测量精度的算法。该算法利用相关谱谱峰及其邻近的2个数据点确定二次插值多项式,然后求取插值多项式的极大值点以确定相关谱谱峰精确位置,有效地提高DSSS信号PN码相位的测量精度。实验结果表明,该算法实现了大幅度提高PN码相位测量精度的目的。A method using 3-points quadratic interpolation to process correlation spectrum peak data was proposed to improve precision of DSSS signal PIN code phase measurement. The method used data points around correlation spectrum peak to determine a quadratic interpolation function, then located the maximum point of the function so as to determine the precise position of correlation spectrum peak, thus effectively increased the precision of measurement. Experiments show that the method reaches the goal of greatly increasing the precision of DSSS signal PN code phase measurement.

关 键 词：直序扩频信号 PN码相位测量 快速傅立叶变换 三点二次插值 

分 类 号：TN91[电子电信—通信与信息系统]