摘要
为降低X射线脉冲星导航定位(XPNAV)系统解脉冲周期模糊的复杂度,提高其工程实用性,该文提出一种新的XPNAV系统解脉冲周期模糊算法。以脉冲星自身属性确定的量作为因子,以每次测量的脉冲到达时间差(TDOA)相位余值确定的量作为常数项,基于正交原理建立了新的脉冲整周期数关系式。理论分析与仿真实验结果表明,新的解脉冲周期模糊算法可以有效降低系统运算量,且可将脉冲整周期数关系式中的参数项固化入运算系统硬件或存储于处理器的存储单元中,便于工程实现。
For reducing the computation complexity of pulse period ambiguity resolution for X-ray Pulsars NAVigation （XPNAV） and improving its convenience in engineering implementation, the Optimization Model for 4 X-ray pulsars localization is presented based on the orthogonality principle. A new relation formula of period number of the Time Difference Of Arrival （TDOA） of pulses is presented, whose factors are decided by the characteristics of X-ray pulsars and whose constancy is decided by TDOA phase residue. Theoretical analysis and experimental simulation show that the new method can reduce the complexity of computation obviously. Meanwhile the relation formula of the new ambiguity resolution has constants, which can be solidified into hardware or be stored into memory unit, so that the new ambiguity resolution is easy to implement in engineering.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第9期2124-2127,共4页
Journal of Electronics & Information Technology
基金
国家高技术研究发展计划项目(2007AA12Z323)
国家自然科学基金(60472085)
陕西省自然科学基金(2006F04)资助课题
关键词
自主天文导航
X射线脉冲星
XPNAV
解脉冲周期模糊
正交性原理
Autonomous celestial navigation
X-ray pulsars
XPNAV
Pulse period ambiguity resolution
Orthogonality principle
