TY - JOUR
N2 - This paper presents the general solution of the least-squares approximation of the frequency characteristic of the data window by linear functions combined with zero padding technique. The approximation characteristic can be discontinuous or continuous, what depends on the value of one approximation parameter. The approximation solution has an analytical form and therefore the results have universal character. The paper presents derived formulas, analysis of approximation accuracy, the exemplary characteristics and conclusions, which confirm high accuracy of the approximation. The presented solution is applicable to estimating methods, like the LIDFT method, visualizations, etc.
L1 - http://rhis.czasopisma.pan.pl/Content/89795/PDF/Journal10178-VolumeXVIII+Issue3_05paper.pdf
L2 - http://rhis.czasopisma.pan.pl/Content/89795
PY - 2011
IS - No 3
EP - 379-390
KW - data window
KW - spectrum approximation
KW - interpolated DFT
KW - LIDFT
KW - spectrum estimation
KW - zero padding
A1 - Borkowski, Józef
PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
SP - 379-390
T1 - Continuous and Discontinuous Linear Approximation of the Window Spectrum by Least Squares Method
DA - 2011
UR - http://rhis.czasopisma.pan.pl/dlibra/publication/edition/89795
DOI - 10.2478/v10178-011-0005-y
ER -