一种改进的长码直扩信号捕获算法研究  

Study on Some Improved Long Code DS Signal Acquisition Algorithm

作　　者：李春萍 李菊 刘晗超 于翔 

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《上海航天》2014年第4期37-40,共4页Aerospace Shanghai

摘　　要：针对直扩系统中长码直扩信号捕获问题,提出一种改进型捕获算法。算法基于扩展复制重叠法,对重叠段进行了平均化处理,采用快速傅里叶变换(FFT)算法进行相关性运算。仿真结果表明:该算法可明显缩短捕获时间,并改善了峰均比。A modified long code DS signal acquisition algorithm was put forward for the long code DS signal acquisition in DSSS in this paper. The replica average was applied to the folding acquisition based on the extended search algorithm. The fast Fourier transform was used in the correlation computation. The simulation results showed that this algorithm could reduce the acquisition time and improve the peak-average ratio.

关 键 词：长码直扩信号 扩展复制平均重叠法 捕获 

分 类 号：TN919[电子电信—通信与信息系统]