摘要
四阶累积量的盲高斯性改善了高斯噪声存在情况下的方位估计算法性能,四阶累积量切片同样具有盲高斯性,结合改进的传播算子法(MPM)不但可以降低算法的运算量,还可以改善算法的性能。首先利用旋转不变方法(RSS)对宽带信号进行聚焦处理,聚焦处理后的矩阵输出再求其四阶累积量切片矩阵,对该矩阵利用改进的传播算子法得到测向结果。论述了四阶累积量切片适用于改进的传播算子法的原理,并通过仿真验证了算法在盲高斯噪声、运算量及测向性能方面的优越性。
Using the 4^th-order cumulant＇s blindness to Gaussian noise, the performance of DOA estimation is improved. The matrix which is called the 4^th-order cumulant slice is derived from the 4^th-order cumulant, Based on the 4^th-order cumulant slice, which retains the peculiarity of Gaussian noise blindness, the modified propagator matrix method （MPM） is used to reduce the computational complexity and gain a better estimation result in DOA. First all the subspaces＇ signals are focused, and then the 4^th-order cumulant slice and MPM are applied to the output of focus. The basic principles of the method proposed is discussed, and then the performance of the method is illuminated by simulations.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第12期2022-2025,共4页
Systems Engineering and Electronics
基金
高等学校优秀青年教师教学科研奖励计划资助课题(2001-226)
关键词
四阶累积量切片
宽带信号
方位估计
传播算子法
4^th-order cumulant slice
wide-band signal
DOA estimation
propagator matrix
