[sdiy] Digital interpolation filtering

[Neil Johnson]

Hi Tom,

> I had a look at this page, and tried out the raised-cosine FIR  
> page, but a couple of things confused me:
>
> Beta. What the hell is beta? I'm told to enter a value between 0  
> and 1, but no clue is given as to what this is. I expect people  
> that know don't need to be told, but it just made me feel ignorant.

As it states on the page itself:

   "... which is known as the roll-off factor or the excess bandwidth"

> Why does the FIR impulse have to have an odd number of taps?

To use this page you don't need to understand that at this stage.   
Just poke in the numbers and out pops the answer.



--
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