[Elecraft] SDR filter improvement

[Hal Massey]

Digital Signal Processing is a field all unto itself. They are definitely *not* emulating mechanical filters. If they were they would be ringing like a mechanical filter. A great text is, "Discrete-Time Signal Processing <https://www.amazon.com/Discrete-Time-Signal-Processing-3rd-Prentice-Hall/dp/0131988425/ref=as_li_ss_tl?ie=UTF8&qid=1489936960&sr=8-1&keywords=Discrete-Time+Signal+Processing+by+A.+V.+Oppenheim+and+R.+W.+Schafer&linkCode=ll1&tag=dspgsm0f-20&linkId=9273a86cec7d4d591dbb9d679bd2afb0> by A. V. Oppenheim and R. W. Schafer.

This is good news because we have not plumbed the depths of what can and can’t be done with DSP yet. 


> On Jun 30, 2021, at 13:05, William Abernathy <wabernat at gmail.com> wrote:
> 
> Hi,
> Seems that SDR radios have software emulation of mechanical filters like
> noise reduction.  Do you think the future holds new filters written in
> software?  I would like a subtraction filter that pulls out the guy 2 KC's
> away.  Maybe the 2nd receiver could be tuned in on the station that needs
> to be subtracted from the primary.
> 
> What do you think?
> 
> Wiliam
> 
> -- 
> *William Abernathy*
> *AA8XX at arrl.net <AA8XX at arrl.net>*
> *AA8XX*
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to haljr.massey at gmail.com