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arXiv 1604.04321cs.ITmath.IT
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基于交替低秩分解的有效降秩DOA估计算法

Efficient Reduced-Rank DOA Estimation Algorithms Using Alternating Low-Rank Decompositions

Yunlong Cai, Linzheng Qiu, Rodrigo C. de Lamare, Minjian Zhao

摘要:

在这项工作中,我们提出了一种交替低秩分解(ALRD)的方法和新的子空间算法的到达方向(DOA)估计。在ALRD方案中,降秩的分解矩阵由一组基向量组成。一个低秩的辅助参数向量,然后计算输出功率谱。交替优化策略的基础上递归最小二乘(RLS),表示为ALRD-RLS和修改的ALRD-RLS(MARLD-RLS),设计计算的基础向量和辅助参数向量。仿真结果表明,所提出的算法优于现有的技术。

英文摘要:

In this work, we propose an alternating low-rank decomposition (ALRD) approach and novel subspace algorithms for direction-of-arrival (DOA) estimation. In the ALRD scheme, the decomposition matrix for rank reduction is composed of a set of basis vectors. A low-rank auxiliary parameter vector is then employed to compute the output power spectrum. Alternating optimization strategies based on recursive least squares (RLS), denoted as ALRD-RLS and modified ALRD-RLS (MARLD-RLS), are devised to compute the basis vectors and the auxiliary parameter vector. Simulations for large sensor arrays with both uncorrelated and correlated sources are presented, showing that the proposed algorithms are superior to existing techniques.

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