There is no third grade level explanation of these concepts. All discussions I have ever read trying to understand IIR, FIR and DSP in general have used high level math (read calculus). I went as far as Algebra II in school and that was over forty years ago. I have no chance of reading about DSP in the ARRL Handbook or Experimental Methods in RF Design and understanding these functions.
How about a discussion of what these filters actually do for you and why you might want to use each one. Telling me IIR filters have feedback and FIR filters don't is good information but why do I care? What does each filter actually do for me and when should I use each one? Remember, no math and don't give me a source to go read about them unless that source doesn't use math in the explanation. --... ...-- Larry KB5DXY Don Wilhelm wrote: > > Lee, > > I do not know if it is 3rd grade level or not, but: > > Look at the ARRL Handbook chapter on DSP and Software Radio Design. In > my 2005 Handbook, I believe the first 2 paragraphs of the sub-section on > IIR Filters (page 16.6, last column) explains it about as well as any. > > In general, practical IIR filters can have steeper skirts, but do not > have the linear phase response of the FIR filters. That usually means > that the IIR filters will tend to ring while the FIR filters do not. At > extremely narrow bandwidths, the IIR filters could be a better choice > for your ears, but others find the ringing irritating - try both on your > ears and pick the one that does the most good for you. > > Now if one can just find a crowded band where the difference can be > adequately tested - that is another thing altogether, perhaps the > weekend activity will provide a suitable test arena. > > Lee Buller wrote: >> I've been doing some reading on the new firmware. I would like someone >> to explain (like I am a 3rd Grader) the different between IIR Filtering >> and FIR Filtering. Thanks. >> >> Lee - K0WA >> "Liberal Arts Major - Mathematically Challenged - Science Wannabe - >> Fascinated by Technology" >> >> > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://n2.nabble.com/Question---for-Educational-Purposes-tp580366p580526.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
