[IRCA] Broadband noise - (Getting rid of it)

["Bob Foxworth" <rfoxwor1@xxxxxxxxxxxxxxx>]

As I work backwards through many postings ...


>Like I posted earlier and only got "one" comment on it. I will repeat
>it. Why don't we put our heads together and come up with a noise
>blanker, notch filter, digital filter, or whatever we call it to get
rid
>the IBOC QRN.? If not get rid of it, cut it down. We already have
>phasing that does work in some situations. Now that is a topic that
>should have mass appeal. Getting rid of the noise instead of just
>complaining about it. Ant takers?
>
>Patrick


(I changed the header beacuse this is not about eye bock)

A filter device would be difficult to implement beacuse of two
reasons, the signal is on for 100% of the time in the time
domain (unlike electric fences, or rotating motor machinery
where the signal is "on" for only a few percent of the time.)

Secondly, the frequency domain is very wide so a notch
filter would not be able to remove more than a small
amount of the interference. I would think that phasing at the
antenna level is the best approach. Once it is in the receiver
chain, the constant-on, wideband aspect means it would
cover virtually all of the desired signal, all of the time.

A null at the antenna level is the best/only approach, I believe.

Sorry to be so negative. Hope s/o else has an idea.

- Bob


_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://arizona.hard-core-dx.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx