upfirdnΒΆ
upfirdn is a polyphase FIR resampling function.
-
y = upfirdn(x, h, p, q);
Return Value
y is erf(x).
Parameters
-
x x is the input signal.
-
h h is a FIR impulse response sequence vector.
-
p p upsampling factor.
-
q q downsampling factor.
Comment
The length of the output, y, is ceil(((len(x)-1)*p+len(h))/q);
- upsampling (that is, zero-insertion) of the input signal by an integer factor (call it P).
- applying an FIR (finite-impulse response filter) to the result of 1.
- downsampling (that is, decimation) of the result of 2. by an integer factor (call it Q).
License: upfirdn (Polyphase FIR Resampling).
Example
y = upfirdn([0:9], [0.5,1,0.5], 2, 3) // linear interpolation, rate 2/3
y -> [0.0 , 1.0 , 2.5, 4.0 , 5.5, 7.0 , 8.5]
History
| Version | Description |
|---|---|
| R2013.3 | New. |
See also
id-1317927