摘要
自适应置零是数字阵列雷达抗有源干扰的有效方法。分析了自适应置零技术中相消比与信号相关性的关系,针对低采样率导致自适应置零相消比下降的问题,提出了采用LMS自适应滤波来改善相消比的方法。仿真结果表明通过采用基于LMS算法的闭环形式的自适应置零技术,可以明显地改善自适应置零的性能,该方法在工程中也得到验证。
Adaptive nulling is an effective method against radar active jamming for digital array radar（DAR）.The relation between cancellation ratio of adaptive nulling and signal correlativity is studied,and then a method of adaptive filter based on LMS algorithm for improving performance of adaptive nulling is presented to overcome the descent of cancellation ratio resulted from lower sample frequency.Simulation results show that the performance can be improved by using closed-loop adaptive nulling technique based on LMS algorithm.The technical feasibility is proved by radar engineering.
出处
《中国电子科学研究院学报》
2013年第4期433-436,共4页
Journal of China Academy of Electronics and Information Technology
关键词
自适应置零
LMS算法
低采样率
相消比
adaptive nulling
LMS algorithm
low sample frequency
cancellation ratio
