摘要
针对固定单站定位问题,提出一种改进的长基线干涉仪测距方法。在分析长基线干涉仪测距方法基本原理的基础上,指出传统方法存在的基线较长、难以实现相参、传输损耗大等问题,提出通过两组较短的平行基线构成等效基线进行测距的方法,两组基线之间无需相位同步,降低了系统实现的难度,扩大了单站测距定位技术的应用范围。其次,推导了测距误差关于参数测量误差的公式,理论和仿真分析表明,相对基本的长基线干涉仪测距方法,在等效基线长度相等的前提下,改进的长基线干涉仪具有更高的测距精度,且具有相似的误差分布和模糊数分布特性。
By analyzing passive ranging using long baseline interferometer （LBI） for single station location, a new modified LBI ranging method is proposed aimed at avoiding the difficulty of phase synchro- nization and transmission loss for long baseline. New method uses two relatively short baselines whieh have no requirement on phase synchronization and can be configured easily to compose a long ranging baseline. New method extends the applicability of passive ranging technology. Then ranging precision is deduced. Theoretical analyse and simulation show that modified method has better ranging accuracy with the same equivalent baseline length. And error distribution and ambiguity characteristic of new method are similar to the traditional method.
出处
《航天电子对抗》
2017年第6期23-28,共6页
Aerospace Electronic Warfare
关键词
无源测距
单脉冲定位
长基线干涉仪
平行长基线对
passive ranging
mono-pulse location
long baseline interferometer （LBI）
coupled parallel long baseline
