摘要
分析了回波信号以及其共轭信号的FRFT幅值特性,并利用此特性提出了一种基于共轭FRFT模函数对消的海面运动目标检测方法。该方法利用回波信号在最佳变换角度有较好的能量聚集,而其共轭信号在此最佳变换角度没有能量聚集。利用两者FRFT模函数之差对消部分杂波,在保证信号能量基本不被削弱的前提下达到抑制杂波、提高检测概率的目的。高斯噪声与IPIX雷达数据实验表明该方法在低信杂比条件下有较好的检测性能。
The amplitude characteristic of echo signal and its conjugate signal are analysis,based on that a detection method based on conjugated FRFT in sea clutter is proposed.The echo signal have good energy congregate at the best angle,but its conjugate signal have no energy congregate at the angle.Make difference of the two FRFT models to weakened partly clutter,and restrain clutter,the detect probability is increased.Experiment using the gauss noise and IPIX data shows that the method have good detect probability in low SCR.
出处
《科学技术与工程》
2011年第29期7118-7122,共5页
Science Technology and Engineering
