卫星干扰源定位技术的关键之一是定位参数的测量。目前传统的定位时延估计算法无法满足在低信噪比环境下的到达时间差(time difference of arrival,TDOA)参数估计。为了进一步提高定位性能,提出了基于四阶累积量的最小均方误差算法(least mean square algorithm based on fourth-order cumulant,CUM-LMS),在使用四阶累积量进行时延估计的基础上,提取峰值信息,计算均方误差,得到准确的TDOA参数。实验结果表明,所提出的算法有效地提高了时延参数估计的性能。
【英文摘要】
One of the key points of satellite interference source positioning is the location parameters measurement.The existing time delay estimation algorithm of positioning cannot satisfy the time difference of arrival(TDOA)parameter estimation under low signal-to-noise ratio(SNR)circumstance.In order to improve the performance of locating,the least mean square algorithm based on fourth-order cumulant(CUM-LMS)is presented.On the basis of the time delay estimation using forth-order cumulant,the method can extract p...