摘要
在研究精密测距系统(PDME)测距原理及工作模式的基础上,分析了因脉冲幅度或判决门限不稳引起测时误差从而导致测距误差的过程。分IA和FA两种模式,从测量脉冲前沿的数学表达式出发,研究因脉冲幅度或判决门限不稳引起的测时误差,依据PDME工作原理推算测距误差,进一步根据接收机输入端脉冲信号峰值电压与距离的关系分析了测距误差与距离的关系。最后根据对测距误差的分析,对两种模式的测距误差情况进行了仿真,给出了仿真结果。
Distance measuring theory and working patterns of precision distance measuring equipment （PDME） are studied. The distance error caused by the unstable state of pulse amplitude or decision threshold is analyzed. Aiming at working patterns of IA and FA, time measuring error caused by the unstable state of pulse amplitude or decision threshold is also studied based on the expression of measuring pulse. The distance error is reckoned based on theory of PDME. The relation between distance error and distance is analyzed ac cording to the relation between pulse amplitude and distance. The distance error is simulated and the results are given.
出处
《雷达科学与技术》
2013年第3期302-304,310,共4页
Radar Science and Technology
关键词
精密测距系统(PDME)
脉冲幅度
判决门限
测距误差
precision distance measuring equipment （PDME）
pulse amplitude
decision threshold
distance error
