一种改善GNSS弱信号捕获性能的伪码优化设计  

A PN-Code Optimal Design for Better Performance of Code Acquiring in MAI Environment

作　　者：张祥莉[1,2] 胡修林[1] 唐祖平[1] 

机构地区：[1]华中科技大学电信系,湖北武汉430074 [2]中国地质大学(武汉)机电学院,湖北武汉430074

出　　处：《电子学报》2013年第10期1953-1957,共5页Acta Electronica Sinica

基　　金：教育部高等学校博士点专项科研基金(No.20110142120076)

摘　　要：强多址干扰下的弱信号捕获是高灵敏度GNSS接收机比较常见又难以解决的问题.本文提出一种非等长的伪码设计方法,通过使各路导航信号调制伪码码长互质,从时域上降低了伪码的互相关值,从频域上降低了目标信号和干扰信号的谱分离系数.理论分析和仿真表明,基于非等长的伪码优化方法,能够改善强多址干扰环境中弱信号的捕获性能.A PN code optimal design based on unequal-length code modulation is proposed in this paper for better perfor- mance of code acquiring for weak signals. The principle is that by using un-equal-length code in spread-spectrum modulation the cross-correlations between different signals have been sliding, thus suppressing multiple access interference effectively. Theoretical analysis and simulation show that this design has predictive power for compressing multi access interference.

关 键 词：GNSS 捕获 弱信号 多址干扰 伪码 

分 类 号：TN911.23[电子电信—通信与信息系统]