In article ,
Rob Collis wrote:

I am attracted by the uses of DSP within amateur radio and would be
interested in any knowledge sources to get me started, both hardware and
software.

You could google for gmfsk which is a piece of software that is open
source, written for Linux, and runs most of the digital modes used in
amateur radio. Maybe studying that code will give you an idea how to
do it.
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jhhaynes at earthlink dot net