On 12/20/2019 10:39 AM, Joe K wrote:
Hi all,
Maybe this is a dumb question, but I didn't find any discussion on the
web or in the mailing list archives. The integrate block (e.g.,
blocks.integrate_ff) doesn't seem to operate as I'd expect.
What I'm looking for is a block that integrates from time 0 with no
decimation. So, an input stream of [1, 2, 3, 4, 5] would output [1,
3, 6, 10, 15], etc. A constant input K would generate a ramp with
slope K. That's what I thought the integrate_ff block, with
decimation=1, would do, but it does not.
The integrate_x blocks seem to only integrate over the previous N
samples, where N = decimation. Therefore, with decimation=1, the
integrate_x blocks simply relay the input to the output. If so...
what is the point of that?
Is there any block that accomplishes a true integration as described
above? It would be a quick block to implement in an OOT module but it
seems like this is a basic function. Also, is the operation of the
integrate_x blocks intended to be how it is? If so, it seems misnamed.
Thanks,
Joe
A IIR filter with Alpha and Beta both set to 1.0 will accomplish this.
Although, in real life, most people using integration functions in DSP want
something more like what the integrate block does, since without a
"dump" type operation, the integrator output will "rail" pretty quickly.
