摘要
鉴于我国的北斗卫星具有可对我国实现连续覆盖、产生的多普勒频移不明显、邻近信道的干扰单一、安全性高等特征,利用北斗卫星作为机会辐射源进行无源定位。考虑大气折射引起的定位误差,提出一种定位误差修正方法,使定位精度进一步提高。仿真结果表明,随着仰角增大或目标高度减小,雷达定位误差也相应减小。经大气折射误差修正后的无源雷达定位精度大大提高。
Beidou satellite has been used as external illuminator due to its features such as continuous coverage to our country, less motion relative to the earth, unapparent Doppler frequency, simple disturbance of adjacent channel and high security. Taking account of the location error caused by atmospheric refraction, a location error correction method was given, to further improve the position accuracy. The simulation results show that radar position errors could reduce correspondingly with the increase of elevation or the decrease of target altitude. Passive radar position accuracy is improved greatly by correcting atmospheric refraction.
出处
《计算机应用》
CSCD
北大核心
2013年第3期611-613,共3页
journal of Computer Applications
基金
国家自然科学基金资助项目(61077037)
关键词
北斗卫星
无源定位
大气折射
误差修正
仿真
Beidou satellite
passive location
atmospheric refraction
error correction
simulation
