Download Help (Windows Only) |
Owning Class: filter design
Requires: MathScript RT Module
b = fir_fs(n, f, a)
b = fir_fs(n, f, a, w)
Legacy Name: fir2
Uses frequency sampling to design a linear phase FIR filter. fir_fs windows the impulse response with a Hamming window.
Name | Description |
---|---|
n | Specifies the filter order. n is a nonnegative integer. n must be even for filters with a non-zero gain at the Nyquist frequency. If n does not meet this condition, LabVIEW increases n by 1. |
f | Specifies the frequencies at which you want to take samples. 1 represents the Nyquist frequency. f is a real vector of ascending values in the interval [0, 1]. length(f) must equal length(a). |
a | Specifies the magnitudes at each of the f frequencies. a is a real vector. length(a) must equal length(f). |
w | Specifies the symmetric window to apply to the impulse response. w is a real vector of length n + 1. |
Name | Description |
---|---|
b | Returns the filter coefficients of order n. b is a real vector. |
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 |
N = 13;
F = [0, 0.1, 0.5, 0.7, 1];
A = [0, 1, 1, 0, 0];
B = fir_fs(N, F, A)