基于LVD变换的参差重频解模糊  

Staggered PRF Solve Ambiguity Based on LVD Transform

作　　者：张一鸣 张磊[1] 井伟[1] ZHANG Yiming;ZHANG Lei;JING Wei(Xi'an Electronic Engineering Research Institute,Xi'an 710100,China)

机构地区：[1]西安电子工程研究所,陕西西安710100

出　　处：《电声技术》2023年第12期92-95,共4页Audio Engineering

摘　　要：在实际工程中,搜索转跟踪雷达在搜索模式下通常采用参差重频技术来解算目标的多普勒频率,但如果是带有高加速度的目标,单个脉冲波束驻留时间内会造成多普勒维的扩展,导致无法准确得出模糊频率,从而导致解不出或者解出的多普勒频率与实际值偏差较大。通过在搜索模式下使用吕氏分布(Lv’s Distribution,LVD)变换估计目标的加速度,以此对回波信号进行多普勒维的补偿,再通过参差重频法解算多普勒频率,即可解算出真实的多普勒频率。通过仿真验证了所提方法的有效性。In practical engineering,search-and-track radar usually uses staggered pulse repetition frequency technology to calculate the Doppler frequency of the target in search mode.If it's a target with high acceleration,the Doppler dimension will expand during the dwell time of a single pulse beam,which will lead to the inability to accurately obtain the fuzzy frequency,resulting in the inability to solve it or the large deviation between the calculated Doppler frequency and the actual value.By using Lv's Distribution(LVD)transform to estimate the acceleration of the target in search mode,the Doppler dimension of the echo signal can be compensated,and then the Doppler frequency can be calculated by staggered repetition frequency method,so that the real Doppler frequency can be calculated.The effectiveness of the proposed method is verified by simulation.

关 键 词：高加速度 多普勒模糊 参差重频技术 

分 类 号：TN95[电子电信—信号与信息处理]