摘要
分布式全相参雷达技术要求各单元雷达同时实现发射相参和接收相参,结合分布式全相参雷达的工作过程,归纳了接收相参和发射相参工作模式下的相位差闭环跟踪环路。通过理论分析可知,接收相参能实现相位差的理想跟踪,而发射相参的相位差跟踪结果会受到系统相位同步误差的影响,最后提出一种基于回波信噪比动态估计的相参差闭环跟踪算法,使得系统全相参合成信噪比改善不低于8dB。
Both transmitting coherent and receiving coherent are required in distributed aperture coherent radar system.The tracking loops of phase difference in the receiving coherent mode and the transmitting coherent mode were proposed based on the working mechanism of distributed aperture coherent radar.Theoretical analysis shows that the former method could track the phase difference accurately,while the tracking accuracy of the latter method was affected by the phase synchronization error between two base units of distributed aperture coherent radar.Finally,the closed-loop tracking technology of phase difference was proposed based on dynamic estimation of the SNR of reflected waves,system coherent synthesis SNR improvement is not less than 8dB.
出处
《制导与引信》
2015年第2期38-43,共6页
Guidance & Fuze
关键词
相参雷达
相位差
跟踪环路
phase parameter radar
phase difference
tracking loop
