Efficient Estimation of Scatter Matrix with Convex Structure Under $T$ -Distribution.
ICASSP(2018)
摘要
This paper addresses structured covariance matrix estimation under t-distribution. Covariance matrices frequently reveal a particular structure due to the considered application and taking into account this structure usually improves estimation accuracy. In the framework of robust estimation, the t-distribution is particularly suited to describe heavy-tailed observation. In this context, we propose an efficient estimation procedure for covariance matrices with convex structure under t-distribution. Numerical examples for Hermitian Toeplitz structure corroborate the theoretical analysis.
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关键词
Robust estimation, structured covariance matrix, convex structure, t-distribution, M-estimators
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