Details

Autor(en) / Beteiligte

• Li, Zenghui
• Xu, Bin
• Yang, Jian
• Song, Jianshe

Titel

A steady-state Kalman predictor-based filtering strategy for non-overlapping sub-band spectral estimation

Ist Teil von

• Sensors (Basel, Switzerland), 2015-01, Vol.15 (1), p.110-134

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2015

Quelle

MEDLINE

Beschreibungen/Notizen

• This paper focuses on suppressing spectral overlap for sub-band spectral estimation, with which we can greatly decrease the computational complexity of existing spectral estimation algorithms, such as nonlinear least squares spectral analysis and non-quadratic regularized sparse representation. Firstly, our study shows that the nominal ability of the high-order analysis filter to suppress spectral overlap is greatly weakened when filtering a finite-length sequence, because many meaningless zeros are used as samples in convolution operations. Next, an extrapolation-based filtering strategy is proposed to produce a series of estimates as the substitutions of the zeros and to recover the suppression ability. Meanwhile, a steady-state Kalman predictor is applied to perform a linearly-optimal extrapolation. Finally, several typical methods for spectral analysis are applied to demonstrate the effectiveness of the proposed strategy.