摘要
针对无源定位中时延估计的问题,在研究循环二次相关时延估计算法的基础上,结合希尔伯特差值时延估计算法,提出了一种新的时延估计方法。该方法运用希尔伯特差值法对循环二次相关峰值进行锐化处理,提高了时延估计精度,能在低信噪比条件下取得更好的时延估计性能。仿真验证了算法的有效性。
Aiming at the problem of time decoy estimation（TDOA） in passive location, based on studying the circular second correlation TDOA algorithm, combining with Hilbert difference time delay estimation algorithm,this paper presents a kind of new time delay estimation method. This method applies the Hibert difference method to sharpen the circular second correlation peak,which raises the accuracy of time delay estimation, and makes it possible to fetch better time delay estimation performance under low signal noise ratio. The simulation validates the validaty of the algorithm.
出处
《舰船电子对抗》
2011年第4期58-61,共4页
Shipboard Electronic Countermeasure
关键词
时延估计
循环二次相关
希尔伯特差值法
time decoy estimation
circular second correlation
Hilbert difference method
