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电子学报  2013 

一种改善GNSS弱信号捕获性能的伪码优化设计

DOI: 10.3969/j.issn.0372-2112.2013.10.013, PP. 1953-1957

Keywords: GNSS,捕获,弱信号,多址干扰,伪码

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Abstract:

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.

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