DSP

Digital Signal Processing

AMRAD has been actively involved with Digital Signal Processing for many years. Originally, we used the Motorola 56000EVM board, and various TI DSP evaluation boards.

As PC computing power has increased, the use of special-purpose DSP CPUs and boards has diminished significantly. Today, many DSP functions are being handled by the normal PC or MAC (desktops or laptops).

AMRAD (and Terry WB4JFI) still have some of the special-purpose DSP hardware and software, but is VERY RARELY used.

Some related DSP information (temporarily shown):

DOS-based spectrum analyzer: dosanalyzer

SM5BSZ hardware/software: sm5bsz

Additional information will appear here soon.

There is another important source, and that is YOU, dear web surfer, who may have the most exciting news yet! If so, send email to the webmaster (click on link at the bottom of the page) pronto.

Mel Seyle (W4MEL) and Terry Fox (WB4JFI) mods to Edson’s sdr_shell (Linux):

marp2.tar.gz

 

Related Links

DSP Guru – Lots of information on filters, multirate, FFT, CORDIC, …
DSP Related – Yet more DSP related information
The Scientist and Engineer’s Guide to Digital Signal Processing – Free online book
The Zynq Book –  Free online book and other Zynq resources
TAPR/HPSDR Content  – Video lecture, documents and links regarding SDR

Paper: “A Survey of CORDIC algorithms for FPGA based computers”, by Ray Andraka is one of the often-cited basic papers:
Paper: “Implementation of the CORDIC Algorithm in a Digital Down Converter”, by Chris K. Cockrum, compares a CORDIC-based downconverter to a Softrock:

Paper:  “DIGITAL DOWN CONVERSION IN SOFTWARE RADIO TERMINALS“

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