基于微波多普勒雷达谱特征的目标检测与抑制方法

Target Detection and Suppression Based on Spectral Characteristics of Microwave Doppler Radars

利用含目标信号的海杂波多普勒谱幅度显著增强的特点,采用频域滑窗比较不同距离元多普勒谱幅度的方法检测有目标的距离元,得到雷达探测海域中目标的位置,并对被干扰的数据进行目标抑制处理.实测数据处理结果表明,目标检测结果和实际情况一致,对目标所在距离元数据的目标抑制处理减小了由目标引起的多普勒谱中心频率的偏差,提高了反演结果的准确度,验证了此算法的有效性.

Based on the fact that the amplitude of Doppler spectra significantly enhances when target exists in the radar illumination area,the location of target is found and suppressed by comparing spectra amplitude from different range gates making use of a sliding window in frequency domain. Processing of the measured data shows that the detection results are consistent with the fact,and the suppression algorithm reduces the error in center frequency estimation and improves the accuracy of inversion algorithm. The effectiveness of this algorithm is verified by measured data.