Re: new FM demodulator

On 1/30/14, keenerd keenerd@gmail.com wrote:

On 1/30/14, Anders Lynge Esbensen anders@lyes.dk wrote:

...

I've implemented a faster FM demodulator for rlt_fm.

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

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?

-Kyle http://kmkeen.com