基于传播算子的近场源二维参数联合估计

发布时间：2018-01-26 16:14

  本文关键词： 近场源 四阶累积量 方向估计 距离估计 传播算子　出处：《系统仿真学报》2017年10期 　论文类型：期刊论文

【摘要】：提出一种基于四阶累积量和传播算子的近场源方向角和距离二维参数联合估计算法,算法利用均匀线阵接收的数据构造四阶累积量矩阵,采用传播算子方法估计出接收信号的噪声子空间,构造MUSIC谱函数,通过谱峰搜索方法,估计信源的方向角和距离二维参数。与传统MUSIC算法相比,所提出的算法利用传播算子方法直接估计出噪声子空间的最小二乘解,而非传统奇异值分解算法的正交解,在估计性能上略逊色于传统的奇异值分解算法,但是却具有较低的计算复杂度,仿真实验验证了所提出算法的有效性。
[Abstract]:Based on fourth-order cumulant and propagation operator, a two-dimensional joint estimation algorithm of near-field direction angle and distance is proposed. The algorithm constructs the fourth-order cumulant matrix from the data received by uniform linear array. The noise subspace of the received signal is estimated by using the propagation operator method, and the MUSIC spectral function is constructed, and the spectral peak search method is used. Compared with the traditional MUSIC algorithm, the proposed algorithm uses the propagation operator method to estimate the least square solution of the noise subspace directly. However, the orthogonal solution of the unconventional singular value decomposition algorithm is slightly inferior to the traditional singular value decomposition algorithm in estimation performance, but it has lower computational complexity. The simulation results show that the proposed algorithm is effective.
【作者单位】： 天津职业技术师范大学;北京交通大学;
【基金】：国家自然科学基金(61271412) 天津职业技术师范大学校级项目(KJ14-33,RC14-46,KJ1713)
【分类号】：TN911.7
【正文快照】： 引言1信源参数估计问题是阵列信号处理中一个重要的研究方向,在雷达、声纳、生物医学、地震勘探等诸多领域中都有着广泛的应用,根据信源距离接收阵列的远近,信源参数估计问题可分为近场源参数估计问题和远场源参数估计问题,在远场源参数估计中,信源假设为平面波,只需要用方向，

本文编号：1466050