两种脉冲压缩实现方式对微动目标回波影响的研究

Effect of two pulse compression approaches on micro-motion target

基于脉冲体制雷达微动目标回波的两种脉冲压缩实现方式:直接法和Dechirp法,对旋翼微动目标回波脉压结果进行了对比研究.首先从理论上分析了直接法和Dechirp法的旋翼微动目标回波信号,并对两种脉压结果的幅度和相位进行了比较分析;其次针对回波相位模糊解缠,比较了两种脉压情况回波相位的差异,定量指出了Dechirp脉压方法引入的RVP项和"斜置"项对回波相位的影响程度.最后进行了仿真验证.

The two approaches of realizing pulse compression of micro-motion target echo of pulsed radar referto the direct method and Dechirp method, on the basis of which this paper makes a contrastive study of thepulse compression result of the rotor micro-motion target echo. Firstly, the paper theoretically analyzes the characteristicsof the rotor micro-motion target echo signal under the direct method and Dechirp method, and also comparativelyanalyzes the amplitude and phase of the pulse compression results in the two methods. Secondly, the paperaims at the echo-phase ambiguity unwrapping to compare the difference of echo-phase in the two cases ofpulse compression, and quantitatively points out the degree to which“slanting”and RVP introduced by theDechirp method produce on echo-phase. Finally the paper makes an emulation proof.