function FlatTop(const Src: TVec; WindowMode: TSignalWindowMode): TVec;
Flat-top window.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Src | TVec | |
| 2 | WindowMode | TSignalWindowMode |
Returns: TVec
Remarks:
Applies Flat top window to Src. Window functions are applied to the signal prior to conversion to frequency domain with the FFT algorithm, to reduce the spectral leakage. Their side-effect is a lower frequency resolution. Flat top window was used to get more accurate amplitude information when frequency interpolation routines where not yet common.
w[i] = 0.2810639 - 0.5208972*cos(2*Pi*i/(n-1)) + 0.1980399*cos(4*Pi*i/(n-1)))
0 < i < n-1
See Also: SignalUtils.Kaiser, SignalUtils.SignalWindow
Indexed: function FlatTop(const Src: TVec; WindowMode: TSignalWindowMode; Index: Integer; Len: Integer): TVec;
Flat top window.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Src | TVec | |
| 2 | WindowMode | TSignalWindowMode | |
| 3 | Index | Integer | start index |
| 4 | Len | Integer | element count |
Returns: TVec
Remarks:
Applies Flat top window to Src vector from element at Index to element at Index + Len - 1.