DSP Robotics Support

Posted: **Sat May 05, 2018 9:50 am**

Hi there,

I've a collection of 100 samples that describe a discrete signal (from 1hz to 40hz), and I'd like to plot a graph that show the analog/continuos-bandlimited signal after an ideal DAC.

Is there any Whittaker–Shannon Interpolation module out of the box that will already draw it?
Or somethings made by community in these years that emulate this?

Thanks

Posted: **Sat May 05, 2018 7:37 pm**

Here is one for sample size power of two.

Posted: **Mon May 07, 2018 9:13 am**

martinvicanek wrote:Here is one for sample size power of two.

Thanks for the help and the fancy module

Tried to edit the input signal with a sin. But it messes the graph, not sure why:

: sine.png (41.57 KiB) Viewed 9632 times

Here's the DSP code:

Code: Select all

streamin sr;
streamin freq;
streamout x;
float i=0;
x = sin1(i/sr);
i = i + sr/freq;

Schematic:

SincInterpolation_Sine.fsm: (10.04 KiB) Downloaded 864 times

Sometimes, it draw correctly

Where's the bug? Thanks

Posted: **Mon May 07, 2018 9:28 am**

I think I've got it! I just need to retrigger the [F] SyncInterpolation module, so it propagates the changes

Thanks boss!!!!

DSP Robotics Support

Any Whittaker–Shannon Interpolation module?

Any Whittaker–Shannon Interpolation module?

Re: Any Whittaker–Shannon Interpolation module?

Re: Any Whittaker–Shannon Interpolation module?

Re: Any Whittaker–Shannon Interpolation module?