Search found 2 matches

by KA9Q
Fri Nov 16, 2018 10:41 pm
Forum: SDRuno
Topic: What's This Minor Audio Distortion From?
Replies: 3
Views: 2939

Re: What's This Minor Audio Distortion From?

I've been noticing the very same thing on WWV, mainly at 10 MHz, using my own multicast-based SDR written from scratch and using the AMSAT UK Funcube Pro+ dongle. PY2SDR contributed a spectrum display program for my SDR, and on it I see a lot of distortion. I see harmonics of the audio tones, and in...
by KA9Q
Sat Sep 24, 2016 7:02 am
Forum: Code Corner
Topic: IQ DEMODULATION FM
Replies: 1
Views: 4054

Re: IQ DEMODULATION FM

I've just been working on this myself. There are several methods that give approximate results, but the only way I know to get exact results is the arctangent function, also available in complex math libraries as the carg (complex argument) function. Applying this to a complex sample gives you its p...

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