一种孔径渡越时间补偿方法研究  

A Study on Compensation Method of the Aperture Fill Time

作　　者：周伟光[1] 王建明[1] 谢纪岭[1] 叶评[1] 王其冲[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2011年第1期41-46,共6页Modern Radar

摘　　要：在频谱合成法的基础上建立了线性相控阵雷达中调频步进频信号的处理模型,分析了孔径渡越时间对调频步进频信号带宽的限制,提出了基于移频原理的解决方法,并给出了相应的仿真结果。理论分析及仿真结果表明,在调频步进子脉冲信号带宽小于孔径渡越时间倒数的条件下,合成信号带宽仍受孔径渡越时间限制;利用移频的方法可以有效补偿孔径渡越时间的影响。Based on the spectrum-synthesizing method, a processing model of the chirp stepped-frequency is built for linear phased array. The effects of the aperture fill time on the bandwidth of the chirp stepped-frequency signal are analyzed. The solution of the frequency-shifting method is proposed and the corresponding simulation results are given. It shows that the bandwidth of the chirp stepped-frequency signal is still limited by the aperture fill time although the bandwidth of the subpulse is less than the reciprocal value of the aperture fill time. In addition, the problem can be effectively improved by the frequency-shifting method.

关 键 词：孔径渡越时间 移频 频谱合成 调频步进频 

分 类 号：TN958[电子电信—信号与信息处理] TN957.52[电子电信—信息与通信工程]