GPS P码并行矩阵式直接捕获方法  

A Parallel Method in Matrix Form for GPS P Code Direct-acquisition

作　　者：曹进[1] 李荣冰[1] 徐昭[1] 谢非[1] 

机构地区：[1]南京航空航天大学导航研究中心,江苏南京210016

出　　处：《航空计算技术》2012年第5期111-114,共4页Aeronautical Computing Technique

基　　金：国家自然科学基金项目资助(60904091;91016019;61104188;61273057);航空科学基金项目资助(20100852010);国家重点基础研究发展计划(973计划)项目资助(2009CB724002);中央高校基本科研业务费专项资金资助;南京航空航天大学研究生创新基地(实验室)开放基金项目资助(kfjj120106)

摘　　要：弱信号环境下,GPS信号中P码具有很强的抗模仿和抗欺骗能力。为了解决P码直接捕获技术中P码序列特性与无周期性,提出一种快速实现P码捕获的矩阵式直接捕获方法。在对直接平均法进行原理分析的基础上,研究了矩阵式频域直接捕获方法的模型,并对提出的P码捕获算法进行硬件系统设计和实现,在弱信号环境下对矩阵处理器进行实际测试。结果表明,与传统方法相比,算法能提高硬件效率,缩短捕获时间,提高数据处理效率。Under the weak signal environment,GPS P-code is of high level of anti-deception and anti-spoofing.To deal with the features of long code and aperiodicity,we present a direct acquisition with matrix method in this paper.Based on the analysis of direct average method theoretically,a direct acquisition method with matrix is designed which is used to acquire the P-code fast.Therefore,on the basis of researching the relevant theory,a hardware system for verification based on the matrix direct acquisition method is achieved.After the test of the designed acquisition system in weak signal environment,the result shows the method we designed can improve the hardware efficiency by reducing the acquisition time and improve the efficiency of data processing.

关 键 词：P码直接捕获 矩阵处理器 FPGA IP核 信噪比 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]