30 Jan
2014
30 Jan
'14
4:21 p.m.
On Thu, Jan 30, 2014 at 5:35 PM, keenerd <keenerd(a)gmail.com> wrote:
On 1/30/14, keenerd <keenerd(a)gmail.com> wrote:
I have also be playing around with the atan demodulators. gnuradio uses
fast-atan tables instead of the libC version.
I dunno how libc implements it, but they could be worth considering...
Nikos
On 1/30/14, Anders Lynge Esbensen
<anders(a)lyes.dk> wrote:
I've cleaned it up and it is in my repo. You can enable it with "-A ale"
https://github.com/keenerd/rtl-sdr/commit/025fb56dff98
Some quick benchmarks:
std: 10%
fast: 7%
lut: 7%
ale: 7%
Sound quality is also noticably worse with ale, but that might be from
an error in the fixed point conversion. How does the math look to
you?
I've implemented a faster FM demodulator for
rlt_fm.
Let me see if I can get a fixed-point version written.
-Kyle
http://kmkeen.com