摘要
针对跟踪阶段雷达高速目标的回波包络移动问题,分析了高速目标的回波特性,提出了一种新的基于发射信号预处理的距离走动补偿方法.该方法结合直接数字频率技术,充分发挥其采样灵活性,在发射时对信号进行伸缩变换,使回波包络能够在快慢时间域自动对齐;接收处理时,结合解线性调频法,补偿由加速度引起的二次相位项,可同时解决目标回波的跨多普勒走动问题.这种方法计算量小,简单易行.仿真结果证明了算法的有效性.
According to the echo range migration of the high speed moving target in the tracking phase,the characteristic of the echo is analyzed,then a novel method of compensating the envelop migration,based on transmit signal pre-process,is proposed.Based on the high Doppler tolerance of the echo,the method makes envelops of echo pulses neat automatically in the fast-slow time domain by stretching the transmit signals.At the receiver,combining the Dechirping method,two index phases caused by the acceleration can be compensated,echo＇s Doppler shifting be compensated simultaneously.This method requires tiny calculating quantities and is easy to achieve.The results of simulation proved the validity of the method presented.
出处
《电波科学学报》
EI
CSCD
北大核心
2013年第2期226-230,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(NSFC61032010)
中央高校基本科研业务费专项资金(ZYGX2010J015)资助课题
关键词
包络走动
移动补偿
预处理
envelop migration
migration compensation
pre-process
