| 朱丽军,陈玉坤.海面舰船目标微多普勒周期快速估计方法[J].电子测量与仪器学报,2020,34(6):169-175 |
| 海面舰船目标微多普勒周期快速估计方法 |
| Fast micro-doppler period estimation method for ship target |
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| DOI： |
| 中文关键词: 进动 微多普勒 参数估计 |
| 英文关键词:ship target micro-motion period estimation |
| 基金项目:浙江省教育厅科研项目(Y201636097)资助 |
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| 中文摘要: |
| 提出一种海面舰船目标微多普勒周期快速估计方法。 受海情影响,舰船目标处于微动状态中,导致雷达回波产生微多
普勒调制。 舰船微多普勒参数与舰船结构、目标动力等密切相关,是舰船目标识别的重要依据。 在建立海面舰船目标雷达回波
模型的基础上,分析了回波的调制特性,并提出一种微多普勒周期快速估计方法。 该方法首先基于最小熵方法实现舰船目标主
体平动的补偿,然后根据微多普勒区域与噪声区域的熵差异实现目标多普勒区间定位,最后计算截取区域的时频相关系数实现
微多普勒周期的估计。 其中微多普勒区间的定位降低了时频相关系数的计算量,使该方法的运算效率相比原有算法有较大的
提升。 在典型场景和雷达参数下,该方法计算效率获得 2. 5 倍的提升。 |
| 英文摘要: |
| A micro-doppler period estimation method for ship target is proposed. Under the influence of sea conditions, ship targets are in
the micro-motion state, which induces micro-doppler modulation on the radar echo. The micro-doppler parameters of the ship target are
closely related to ship structure, target dynamics and so on, which is an important basis for ship target recognition. In this paper, based
on the radar echo model of ship target, the modulation characteristics are analyzed, and a fast estimation method of micro-Doppler period
is proposed. Firstly, the main body translation of ship target is successfully compensated based on the minimum entropy method; then
the Doppler range is located according to the entropy difference between the micro-Doppler area and the noise area; finally, the timefrequency correlation coefficient is calculated to provide the micro-Doppler period estimation. The location of micro-doppler range reduces
the computation burden of the time-frequency correlation coefficient, which makes it fast compared to the original algorithm. Under the
typical scene and radar parameters, the efficiency of the method is improved by 2. 5 times. |
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