Re: [Biosig-general] The Time domain parameters

[Bethel O. <b.o...@re...>]

Dear Alois,

Thank you very much for your reply. I will try to implement what you described. But what I am having problem with is the line in tdp() thus:

filter(B,A,d.^2)./filter(B,A,double(~isnan(d0)))
where
UC =0.0085;  //for example 
B = UC; 
A = [1, UC-1];
and 
d=d0    is the pth derivative

The line with the filter is the line confusing me due to the division because I do not know much about filters for now. But from your description, the line is low pass filtering. So will I achieve what this line is doing if I implement a simulink filter using only 'A' and 'B' (i.e doing only filter(B,A,d.^2))or do I need to divide by an output of another filter as in ./filter(B,A,double(~isnan(d0)))     ?

Thank you again for you time
Bethel
 
________________________________________
From: Alois Schloegl [alo...@is...]
Sent: 16 August 2012 09:06
To: Bethel Osuagwu
Cc: ; Reinhold Scherer
Subject: Re: [Biosig-general] The Time domain parameters

Dear Bethel,


the rtsBCI simulink implements currently only the time domain parameters
of Hjorth and Barlow. Implementing tdp.m in simulink is quite simple.
you just need to connect 1st order difference blocks in a sequential
manner (output of p-th difference block is the input of the next
differential block). Then connect the output of each block, take the
square, do a low-pass filter, and take the logarithm.

I'll forward your request also Reinhold, the maintainer of rtsBCI.


I hope this helps,
    Alois






On 08/14/12 17:12, Bethel Osuagwu wrote:
> Dear Sir,
>
> I just realized that there's no simulink block in rtsBCI  for
> calculating the Time Domain Parameter(TDP) Features implemented in
> Biosig. This TDP were used in 'demo2.m' of Biosig for demonstration.
> I tried reading the tdp() function so that I can implement the
> simulink block but I could not understand some part of the function
> when it takes multiple derivatives. Any help for implementing this
> TDP as a simulink block will be most appreciated.
>
> Thanks Bethel.
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