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arXiv 2401.01161math.OC
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基于凸结构化低秩逼近的恒幅多通道频率估计

Multichannel Frequency Estimation with Constant Amplitude via Convex Structured Low-Rank Approximation

Xunmeng Wu, Zai Yang, Zongben Xu

AI总结:

针对恒幅复正弦波的多通道频率估计问题,提出一种利用恒幅特性的凸结构化低秩逼近方法SACA,通过半定规划实现原子范数最小化,理论分析与仿真验证了其优势。

摘要:

我们研究了从多通道叠加信号中估计多个具有恒定幅度(CA)(也称为恒定模量)的复正弦波频率的问题。为了在原子范数最小化(ANM)框架中利用CA性质进行频率估计,我们引入了由Hankel和Toeplitz子矩阵组成的多个正半定块矩阵,并将ANM问题表述为一个凸结构化低秩逼近(SLRA)问题。所提出的SLRA是一个半定规划,与不使用CA性质的现有此类公式有显著差异。所提出的方法被称为基于SLRA的CA频率估计ANM(SACA)。我们提供了理论保证和广泛的模拟,验证了SACA的优势。

英文摘要:

We study the problem of estimating the frequencies of several complex sinusoids with constant amplitude (CA) (also called constant modulus) from multichannel signals of their superposition. To exploit the CA property for frequency estimation in the framework of atomic norm minimization (ANM), we introduce multiple positive-semidefinite block matrices composed of Hankel and Toeplitz submatrices and formulate the ANM problem as a convex structured low-rank approximation (SLRA) problem. The proposed SLRA is a semidefinite programming and has substantial differences from existing such formulations without using the CA property. The proposed approach is termed as SLRA-based ANM for CA frequency estimation (SACA). We provide theoretical guarantees and extensive simulations that validate the advantages of SACA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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