| 一种脉组间步进频雷达速度估计误差的改进方法 |
| |
| 引用本文： | 尹华桥,王顺喜.一种脉组间步进频雷达速度估计误差的改进方法[J].雷达与对抗,2014(2):35-39,47. |
| |
| 作者姓名： | 尹华桥 王顺喜 |
| |
| 作者单位： | [1]中国电子科技集团公司第三十八研究所,合肥230088 [2]61195部队,南京210008 |
| |
| 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。
|
| 关 键 词： | 步进频 速度误差 合成距离像 快速傅里叶变换 |
A method of improving estimated velocity error using stepped frequency pulse trains |
| |
| YIN Hua-qiao,WANG Shun-xi.A method of improving estimated velocity error using stepped frequency pulse trains[J].Radar & Ecm,2014(2):35-39,47. |
| |
| Authors: | YIN Hua-qiao WANG Shun-xi |
| |
| Affiliation: | 1. No. 38 Research Institute of CETC, Hefei 230088 ; 2. Unit 61195 of the Chinese PLA, Nanjing 210008) |
| |
| Abstract: | 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. |
| |
| Keywords: | stepped frequency velocity error synthetic range profile Fast Fourier Transform |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
