摘要
对单脉冲雷达测速系统的原理进行了描述,并针对回波信号的相位发生跳变致使频谱展宽,出现跟错谱线,导致测速出错的问题,提出了基于鉴频器输出信号能量判别的准则。通过对鉴频器输出信号进行判别,当回波信号的相位发生持续跳变时,鉴频器输出振荡,积分器输出就会超过门限,测速系统重新消模糊;当回波信号的相位稳定后,测速结果可以回到正确的结果上,从而可以修正跳谱线导致的测速误差。
In this paper,the principle of monopulse radar velocimeter system is described,and the criterion of energy discrimination based on frequency discriminator output signal is put forward because of the phase jump of echo signal,which leads to the broadening of spectrum,the occurrence of error line and the error of velocity measurement.By discriminating the output signal of the frequency discriminator,when the phase of the echo signal continues to jump,the output of the discriminator oscillates,the output of the integrator will exceed the threshold,and the speed measuring system will eliminate blurring again.When the phase of the echo signal is stable,the speed-measuring result can be returned to the correct result,so that the speed-measuring error caused by the jump line can be corrected.
作者
程望东
Cheng Wangdong(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)
出处
《电子技术应用》
2020年第5期50-52,58,共4页
Application of Electronic Technique
关键词
单脉冲雷达
测速
I、Q信号
模糊
monopulse radar
velocity measurement
I/Q signal
ambiguity
