[关键词]
[摘要]
宽带Chirp雷达经去线性调频处理后的回波特性表明,运动目标回波脉间频率变化率与脉内剩余调频斜率一致。利用分数阶傅里叶变换(Fractional Fourier Transform,FrFT)处理Chirp信号的能量集聚性,提出基于FrFT的运动目标宽带Chirp雷达多周期回波相干积累方法。仿真结果表明该方法能实现匀速运动目标宽带雷达多次回波相干积累,并对机动目标的脉间能量相干积累具有较好的适应性。
[Key word]
[Abstract]
The characteristics of wideband Chirp radar echoes after dechirping indicate that the frequency change rate among moving target echoes is equal to residual Chirp rate in pulse.Taking advantage of fractional Fourier transform(FrFT) to process the energy concentration of Chirp signal,a novel multiple time-around echo pulses coherent integration method based on FrFT for wideband Chirp radar is proposed.Simulation results show the method's effectiveness of implementation of uniform speed target's multiple time-around echo pulses coherent integration and adaptability to maneuvering target.
[中图分类号]
TN958
[基金项目]
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