archive: Re: SETI Some Questions

Re: SETI Some Questions

Peter J. Thompson ( (no email) )
Thu, 03 Sep 1998 08:04:25 -0400

At 11:50 PM 9/2/98 +0100, you wrote:
>
>It is being done at the IF; it just happens that the final IF is around
>1.5kHz (assuming SSB filters). There is nothing intrinsically audio
>in the signals, so the distinction between IF and audio is arbitrary
>and based on the original intended use of the receiver. If you
>custom designed the receiver, you could do the A/D conversion at any
>centre frequency you chose.
>
Thanks for the clarification, David -- and also Paul for your earlier comments.

Am I correct in assuming that with the existence of arbitrarilly fast A/D conversion coupled with arbitrarilly fast DSP engines that there is intrinsic benefit in doing the 'signal processing' in software. Specifically for SETI, I guess this would allow real-time processing of 'wide' blocks of spectrum with the appropriate level of granularity (bin-width or whatever) and processing algorithm selection. I was wondering how far away we are from doing something like this.

_Pete_

+---------------------------------------------------------------------------+
Peter J. Thompson *I speak only for myself* mailto:pthompson@taratec.com
Taratec Development Corporation http://www.taratec.com
220 Continental Drive, Suite 203
Newark, DE 19713
Phone: 302.368.4040
Amateur Radio: N3EVL
PGP Public Key Available On Request
+---------------------------------------------------------------------------+