摘要
距离-多普勒域的双通道DPCA方法在检测动目标时能有效的抑制杂波,但是,当目标存在方位向速度时将会导致目标扩散,检测性能下降,特别在SNR较低,目标的方位向速度较大时,鉴于此,该文提出一种基于DPCA-FRFT相结合双通道检测的方法,该方法不仅能够在这种情况下有效的检测动目标,而且可以在目标的强度相差较大时,仍然能检测弱目标。考虑到一般DPCA条件很难满足,给出一种在方位时域插值,然后抽取的方法。仿真结果验证了该方法的有效性。
The two-channel DPCA method in range-Doppler domain can suppress clutters effectively in detection of moving targets. However, when a target has a velocity in azimuth, especially when the SNR is low but the azimuth velocity is great, the moving target will diffuse and its performance will decrease. To solve this problem, a method combining the DPCA with FrFt is proposed which not only detects the target effectively but also performs well in the detection of multiple moving targets whose scattering intensities differ evidently. Considering that the DPCA condition is not generally satisfied, a method is given in this paper that interpolation is made first in azimuth time domain and then samples are made. Computer simulation confirms the validity of this method.
出处
《火控雷达技术》
2008年第1期17-22,46,共7页
Fire Control Radar Technology
基金
国家自然科学基金资助项目(N0.60502045)
