At 16:56 3/6/02 -0500, you wrote:
>I wonder if Doug Smith wrote the following very good explanation
>of the Kachina DSP rcvr design theory? Very well done, and
>I am getting close to "knowing" something about DSP rcvr's, but still
>quite a ways to go, hi. Have a look at:
>
>http://www.kachina-az.com/theory1.htm
>
>Guess I "know" what a roofing filter does, explained in the link,
>but why is it called a "roofing" filter?
>
>73, Jim KH7M
Hi Jim and list members,
The only thing I find interesting about the Kachina is that it doesn't use
a DSP chip. It uses a Motorola 16 bit micro-controller for the DSP
work. This does the job, but it is not the same as a dedicated DSP chip.
I have the ARRL book Digital Signal Processing Technology, that Doug Smith
wrote, and highly recommend it to anyone interested in DSP.
I would also like to point you all to the following file on Digital
Receivers, it's on my company's website at:
http://www.pentek.com/support/GetOTD.cfm/Dr_hbk2.pdf?Filename=Dr_hbk2.pdf
I's a small tutorial on how a digital receiver works versus an analog type.
73
Warren Walsh - K2BM
Pentek - Your source for DSP and Digital Receiver Boards.
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Warren J. Walsh (warrenw@pentek.com) Pentek, Inc.
Design Engineer One Park Way
Phone: (201) 818-5900 x 251 Upper Saddle River, NJ 07458
Fax: (201) 818-5941 http://www.pentek.com/
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