摘要
多载频MIMO雷达中,高速运动目标回波信号经通道分离后各通道的距离和多普勒频率均不在同一分辨单元,无法利用传统的超分辨算法对目标距离、角度等参数进行估计.本文根据目标回波特点提出一种基于级联Keystone变换的高速运动目标参数估计方法.该方法先在快时间维利用Keystone变换校正距离走动,再在慢时间维进行Keystone变换校正多普勒走动,最后用MUSIC算法进行距离、方位和俯仰等参数估计.仿真结果表明了所提方法的可行性和有效性.
In multi-carrier-frequency Multiple-Input Multiple-Output（MIMO） radar,the separated echoes of a target with high speed locate in neither the same range bin nor the same Doppler bin.As a result,the parameters（including range,azimuth and elevation） of the target can＇t be estimated using the traditional supper-resolution algorithms.A method based on cascaded Keystone transformation is presented to estimate the parameters of the targets moving at a high speed.Keystone transformation is used to correct range migration in the fast-time dimension,and then the Doppler migration is corrected in the slow-time dimension.Finally the Multiple Signal Classification（MUSIC） algorithm is applied on the corrected data to obtain the range,azimuth and elevation of targets.The simulation results indicate the feasibility and validity of the methods presented.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2010年第12期2763-2768,共6页
Acta Electronica Sinica
基金
国家预研项目(No.51307050102)
2006年教育部新世纪优秀人才支持计划(No.NCET-06-0856)
