new FM demodulator

[keenerd]

On 1/30/14, Anders Lynge Esbensen <anders at lyes.dk> wrote:
> Hi and thanks for a great tool set.
>
> I've implemented a faster FM demodulator for rlt_fm. Its an
> instantaneous frequency demodulator, like the already implemented atan
> method, but it uses some math tricks to get rid of the the actual atan
> calculation. Feel free to use it if you wish

Nice, thank you.

It should probably be under the -A option with all the other types of
FM demodulator math.  Maybe benchmark it against the other FM
demodulators, "-A fast" or "-A lut".  The default "-A std" was not
designed to be very quick, just accurate.  Being faster than "-A std"
is not very difficult.

Let me see if I can get a fixed-point version written.

-Kyle
http://kmkeen.com