一种脉组间步进频雷达速度估计误差的改进方法  

A method of improving estimated velocity error using stepped frequency pulse trains

作　　者：尹华桥[1] 王顺喜 

机构地区：[1]中国电子科技集团公司第三十八研究所 [2]61195部队

出　　处：《雷达与对抗》2014年第2期35-39,47,共6页Radar & ECM

摘　　要：在脉组间步进频信号的脉组内利用傅里叶变换测速时,针对测速误差对合成距离像的影响,提出了二分迭代法。该方法通过log2N次迭代操作便可使测速精度提高N倍(N为脉组个数),通过相关补偿后的合成距离像的走动不超过半个距离分辨单元。此外,由于测速精度提高速率是以2为底的指数增长,且每次迭代为脉组内FFT操作,因此该方法具有较少的运算量。仿真实验验证了该方法的有效性。The Dimidiate Iterative Method （DIM） is proposed to remove the impacts made by the velocity error on the synthetic range profile when the Fast Fourier Transform （FFT） is used in a pulse train of the stepped frequency pulse trains （SFPTs） signal. The estimated velocity precision can be increased by N times via log2N iteration processing using the DIM, where N is the number of pulse trains. Moreover, the migration of the synthetic range profile does not exceed half a range resolution bin after the compensation. Besides, this method can save computation since the precision is grown exponentially with log base 2 and the FFT processing in pulse trains is carried out for each iteration. The effectiveness of the method is verified through the simulation.

关 键 词：步进频 速度误差 合成距离像 快速傅里叶变换 

分 类 号：TN957.51[电子电信—信号与信息处理]