MT Apply Matched Filter (CPM)
- Updated2023-02-17
- 4 minute(s) read
MT Apply Matched Filter (CPM)
Applies a matched filter to a specified CPM-modulated waveform. The node first performs phase differentiation followed by matched filtering on the phase of the input complex waveform. The node returns the matched filtered output with a duration equal to an integer number of symbols, thus ensuring continuability from one iteration to the next.
Use MT Align To Ideal Symbols to locate and realign the matched-filtered waveform at the ideal symbol timing instant.
Inputs/Outputs
input complex waveform
The continuous-time modulated complex baseband waveform data.
t0
Trigger (start) time of the Y array.
Default value: 0.0
dt
Time interval between data points in the Y array.
Default value: 1.0
Y
The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.
matched filter coefficients
An ordered array containing sample-spaced coefficients for the desired matched filter. Wire the matched filter coefficients parameter of MT Generate Filter Coefficients to this parameter. Ensure that the value of samples per symbol matches the matched samples per symbol value used to generate the filter coefficients.
samples per symbol
Number of samples per information symbol in the input complex waveform.
Default value: 16
error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Default value: No error
reset?
A Boolean that determines whether the node continues matched filtering using the previous iteration states.
| TRUE | Resets the matched filtering process. |
| FALSE | Continues performing matched filtering from the previous iteration. Matched filtering begins from the last iteration state on subsequent calls. |
Default value: TRUE
output phase waveform
The output matched filtered continuous-time phase waveform.
t0
Trigger (start) time of the Y array.
Default value: 0
dt
Time interval between data values in the Y array.
Default value: 1.0
Y
The complex-valued signal-only baseband modulated waveform. The real and imaginary parts of this complex data array correspond to the in-phase (I) and quadrature-phase (Q) data, respectively.
error out
Error information.
The node produces this output according to standard error behavior.