ConfigureFftWindowPosition(string, RFmxLteMXModAccFftWindowType, double, double)
- Updated2025-10-13
- 1 minute(s) read
Configures the FFT window position used for an EVM calculation.
Refer to the LTE Modulation Accuracy (ModAcc) topic for more information about FFT window position.
Syntax
Namespace: NationalInstruments.RFmx.LteMX
public int ConfigureFftWindowPosition(string selectorString, RFmxLteMXModAccFftWindowType fftWindowType, double fftWindowOffset, double fftWindowLength)
Parameters
| Name | Type | Description |
|---|---|---|
| selectorString | string | Pass an empty string. The signal name that is passed when creating the signal configuration is used. |
| fftWindowType | RFmxLteMXModAccFftWindowType | Specifies the FFT window type used for an EVM calculation. |
| fftWindowOffset | double | Specifies the position of the FFT window used to calculate the EVM. The offset is expressed as a percentage of the cyclic prefix length. If you set this parameter to 0, the EVM window starts from the end of cyclic prefix. If you set this parameter to 100, the EVM window starts from the beginning of cyclic prefix. |
| fftWindowLength | double | Specifies the FFT window length. This value is expressed in a percentage of the cyclic prefix length. This parameter is used when you set the fftWindowType parameter to Type3GPP, where you need to calculate the EVM using two different FFT window positions, Delta_C-W/2, and Delta_C+W/2. |
Returns
Returns the status code of this method. The status code either indicates success or describes a warning condition.