[Premium-Rx] Filter phase response

[CHARLES HUTTON]

And of course that is because DRM uses OFDM, so phase accuracy is important 
to prevent symbol errors.

Going back to the theme of AM and CW reception, I think it is very incorrect 
to label "DSP filters" as third best. "DSP filters" says nothing about the 
filter characteristics and rather only tells us the implementation. 
Furthermore, a "DSP filter", in theory and practise, can exactly duplicate 
an analog filter given the same type (IIR) and the number of taps that 
matches the order of the desired analog filter.

But of course the major advantage of DSP is the easy implentation of an FIR 
filter.




Chuck




>From: Jon Iza <iapizloj at bi.ehu.es>
>To: premium-rx at ml.skirrow.org
>Subject: [Premium-Rx] Filter phase response
>Date: Wed, 08 Oct 2003 14:09:38 +0000
>
>Folks,
>I talked to one of the researchers on the Digital Radio Mondiale DRM 
>project, and they found that the filter phase and delay was important for 
>good reception (it has to be at least 12 kHz wide).
>I was ashamed to know how deep was the knowledge of that very young 
>engineer (a gal) on that matter. But she didn't know what a radio skip is 
>and why she was not able to receive some stations quite close to the 
>receiving site...
>Nobody's perfect. ;-)
>jon, ea2sn
>
>
>_______________________________________________
>
>Premium-Rx Mailing List
>To Post: premium-rx at ml.skirrow.org
>For Info: http://ml.islandnet.com/mailman/listinfo/premium-rx

_________________________________________________________________
Get MSN 8 Dial-up Internet Service FREE for one month.  Limited time offer-- 
sign up now!   http://join.msn.com/?page=dept/dialup