一种改进的机载双基雷达多普勒频移算法-《郑州大学学报(工学版)》

文章信息/Info

作者:: 赵军1沈明威2朱岱寅3; 1.南京航空航天大学电子信息工程学院,江苏南京210016;2.空军第一航空学院,河南信阳464000;3.河海大学计算机与信息学院,江苏南京211000;4.淮阴工学院计算机工程学院,江苏淮安223003

Author(s):: ZHAO Jun1; 2; SHEN Ming-wei3; ZHU Dai-yin1; ZHAO Jian-yang4; 1.College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;2.The First Aeronautical Institute of Air force,Xinyang 464000 , China; 3.College of Computer & Information ,HohaiU-niversity,Nanjing 211100,China; 4.College of Computer,Huaiyin Institute of Technology,Huaian 223003,Chinma

Keywords:: airborne bistatic radar; doppler warping; clutter suppression; space time adaptive processing

摘要:: 机载双基雷达由于载机之间的相对运动,造成其杂波分布随距离变化而变化,直接导致杂波协方差矩阵估计不准确,进而使得空时自适应处理技术的杂波抑制和动目标检测性能下降.提出一种杂波非均匀补偿技术,该方法先采用多普勒频移预处理,使得主波束方向上的杂波谱重合,然后通过对多个空间角方向上的归一化多普勒频率进行补偿,使各距离单元的杂波谱保持一致.仿真结果表明该方法能有效改善机载双基雷达的杂波非均匀情况,性能明显优于原有算法.

Abstract:: The clutter distribution of airborne bistatic radar varie with ranges due to the relative motion be-tween the transmiter and the receiver and the covariance matrix estimation is no longer accuate ,so that the sta-tistical STAP methods degrade. In this paper,a new clutter compensation algorithm for airborne bistatic radar is proposeu. This methou involves frist a pre-processing with Doppler warping methou to bring the clutter spectra together in the deriction of main beam and subquently Doppler compensation of different range gates in thedirection of multiple space angels.Simulation results show the proposed method can reduce the clutter nonho-mogeneity of bistatic radar effectively and is spuerior to the traditional compensation methods.