How to detect pulses superimposed on a slow varying signals

Hi,


I have to detect pulses depicted in the following picture:

http://postimg.org/image/ud1usxcwr/


They are pulses superimposed on a slow varying signal.

Any ideas?


Thanks,
Enrico Migliore




---------------------------------------
Posted through http://www.DSPRelated.com

On Mon, 28 Sep 2015 12:42:36 -0500, wwwenrico wrote:

> Hi,
> 
> 
> I have to detect pulses depicted in the following picture:
> 
> http://postimg.org/image/ud1usxcwr/
> 
> 
> They are pulses superimposed on a slow varying signal.
> 
> Any ideas?

The easy way is to just run the whole shebang through a really low-pass 
filter, and set a threshold a bit above the baseline.  As long as you 
have a pretty good idea of how big the pulses are, as long as the 
baseline varies slowly, and as long as the pulse density is pretty 
constant, this works well.

Harder situations demand more elaborate solutions, but you need to make 
solutions on a case-by-case basis.

-- 
www.wescottdesign.com