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Owning Class: filter design
Requires: MathScript RT Module
x = fir_gaussps(bst)
x = fir_gaussps(bst, n)
x = fir_gaussps(bst, n, of)
Creates an FIR Gaussian pulse-shaping filter.
|bst||Specifies the 3-dB bandwidth-symbol time product.|
|n||Specifies the number of symbol periods between the start and the peak. The default is 3.|
|of||Specifies the oversampling factor, or the number of samples per symbol. The default is 2.|
|x||Returns the coefficients of the Gaussian pulse-shaping filter. The length of x equals 2*n*of + 1.|
The following equation represents the analog impulse response of the Gaussian pulse-shaping filter:
h(t) = sqrt(pi)*exp(-(pi*t / B)^2) / B
where B is the 3-dB bandwidth of the baseband Gaussian pulse-shaping filter, which LabVIEW uses the following equation to compute:
B = sqrt(log(2) / 2) / bst
After LabVIEW transforms the Gaussian pulse-shaping filter into a discrete signal, the following equation represents the signal:
h(k) = sqrt(pi)*exp(-(pi*k / B)^2) / B
where k ranges from -n*of to n*of.
You can use the Gaussian pulse-shaping filter to counter the effects of intersymbol interference (ISI).
The following table lists the support characteristics of this function.
|Supported in the LabVIEW Run-Time Engine||Yes|
|Supported on RT targets||Yes|
|Suitable for bounded execution times on RT||Not characterized|
x = fir_gaussps(0.13, 3, 5);