| 摘要 |
FIELD: information technology. ^ SUBSTANCE: invention relates to digital signal processing and measuring techniques. At the first approximation stage a fixed observation time interval is divided into local intervals. At each local interval the task of constructing local approximation models of signals is solved, on the basis of which local estimates are calculated for non-stationary parametric functions of composite oscillatory signals. At the second approximation stage the observation time interval with local models of parametric functions in form of piecewise continuous functions is divided into spline intervals on which the task of constructing a spline model is solved, which approximates piecewise continuous functions of estimates of non-stationary parametric functions. The result of spectral time analysis for estimation of non-stationary parametric functions is construction of spline approximating models. ^ EFFECT: provision for method of spectral time analysis, directed at effective estimation of parametric functions of non-stationary signals, as well as provision for a device for realising this method. ^ 2 cl, 5 dwg |
