卫星导航信号长码快速直接捕获算法研究  

Research on fast direct acquisition method of satellite navigation signal

作　　者：张琳[1] 初海彬 张乃通[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001 [2]深圳国际技术创新研究院,广东深圳518075

出　　处：《通信学报》2007年第3期120-124,129,共6页Journal on Communications

摘　　要：以对较低信噪比情况下的长码快速捕获算法进行了研究,分析比较了多种快速捕获算法,研究了一种基于FFT(快速傅立叶变换)的重叠平均块操作快速捕获算法,提出了该算法的工程实现方法,通过Matlab仿真分析了算法的捕获峰值、余量及捕获概率,并通过实验硬件平台分析了算法捕获时间。仿真实验表明该算法具有更快的捕获时间、更高的捕获概率。Fast long period code acquisition algorithm at low signal power was studied. It compared several fast P-code acquisition algorithms, and proposed an overlap average method based on FFT digital signal algorithm. It proposed the engineering realization method, analyzed correlation peak, acquisition margin, and correlation possibility by Matlab simulations, and analyzed acquisition period by hardware platform. The simulations demonstrate that the fast P-code acquisition algorithm designed could obtain shorter acquisition period and higher correlation possibility than other algorithms.

关 键 词：快速傅立叶变换 长码快速捕获 GPS 

分 类 号：TN927.23[电子电信—通信与信息系统]