摘要
针对机载传感器在对抗测向交叉定位系统时,定位精度不易直接评估的问题,开展了定位精度的缩比试验方法研究。介绍了测向交叉定位系统的原理并推导了定位精度的克拉美罗下界。设计了缩比试验场景并对比分析了缩比前后定位精度的克拉美罗下界,为开展定位精度的缩比试验提供了理论支撑。对缩比试验方法进行了仿真验证。仿真结果表明:测向交叉定位系统的缩比试验方法有效可行,可对100 km以外的真实场景开展缩比试验,缩比后的克拉美罗下界达到100 m量级。
Aiming at the problem that the positioning precision of airborne sensor is not easy to be directly evaluated when confronting lateral cross positioning system,shrink ratio experiment of positioning precision is studied.Principle of lateral cross positioning system is introduced and the Cramer-Rao lower bound(CRLB)of positioning precision is deduced.Scene of shrink ratio experiment is designed and the positioning precision before and after shrink ratio experiment is compared and analyzed.The results provide theoretical support for the shrink ratio experiment of positioning precision.Shrink ratio experiment is verified by simulation.Simulation results show that shrink ratio experiment of lateral cross positioning system is effective and feasible,and can carry out shrink ratio experiment on real scenes beyond 100 km.The shrink ratio Cramer-Rao Lower Bound will reach 100m magnitude.
作者
曾小东
ZENG Xiaodong(The 10th Research Institute of China Electronics Technology Group Corporation,Chengdu 610036,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第3期34-36,共3页
Transducer and Microsystem Technologies
基金
国家十三五装备预先研究共用技术基金资助项目。
关键词
机载传感器
测向交叉定位系统
克拉美罗下界
缩比试验
airborne sensor
lateral cross positioning system
Cramer-Rao Lower Bound
shrink ratio experiment
