| LTPDA Toolbox™ | contents | ![]() |
CPSD estimates the cross-spectral density between elements of the vector. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% DESCRIPTION: CPSD estimates the cross-spectral density between the elements of the vector input. The elements are expected to be time-series AOs, otherwise an error will occur. The input should be a vector of time-series AOs of length N. CPSD will then compute all cross-spectral densities between the elements of the vector, resulting in a symmetric matrix of size NxN. NOTE: the lower diagonal elements are not computed; they are just copies of the upper diagonal elements. CALL: mo = cpsd(mi, pl) INPUTS: mi - input matrix object of size Nx1 (or 1xN) pl - input parameter list OUTPUTS: mo - output matrix object of size NxN Parameters Description %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
| Method Details | |
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| Access | public |
| Defining Class | matrix |
| Sealed | 0 |
| Static | 0 |
| Sets for this method … |
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| Default |
Default |
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| no description | |||
| Key | Default Value | Options | Description |
| NFFT | -1 | none | The number of samples in each fft [default: length of input data]. A string value containing the variable 'fs' can also be used, e.g., plist('Nfft', '2*fs') |
| WIN | 'Hanning' |
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The window to be applied to the data to remove the discontinuities at edges of segments. [default: taken from user prefs] Only the design parameters of the window object are used. Enter a string value containing the window name e.g. plist('Win', 'Kaiser', 'psll', 200) plist('Win', 'BH92') |
| PSLL | 200 | none | The peak sidelobe level for Kaiser windows. Note: it is ignored for all other windows |
| OLAP | -1 | none | The segment percent overlap [-1 == take from window function] |
| ORDER, N | 0 |
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The order of segment detrending:
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| NAVS | -1 | none | Force number of averages. If set, and if Nfft was set to 0 or -1, the number of points for each window will be calculated to match the request. |
| TIMES, SPLIT | [] | none | The time range to analyze. If not empty, sets the time interval to operate on. As in ao/split, the interval can be specified by:
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| Some information of the method matrix/cpsd are listed below: | |
|---|---|
| Class name | matrix |
| Method name | cpsd |
| Category | Signal Processing |
| Package name | ltpda |
| VCS Version | f3f3872c69c1252d198e87288372d1367fc6ceec |
| Min input args | 1 |
| Max input args | -1 |
| Min output args | 1 |
| Max output args | -1 |
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Method: matrix/consolidate | Method: matrix/crb | ![]() |
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